Publications (104)
The Properties of the Circumgalactic Medium in Red and Blue Galaxies: Results from the COS-GASS+COS-Halos Surveys
Sanchayeeta Borthakur, Timothy Heckman, Jason Tumlinson +7
We use the combined data from the COS-GASS and COS-Halos surveys to characterize the Circum-Galactic Medium (CGM) surrounding typical low-redshift galaxies in the mass range $\rm~M…
Shining a Light on the Connections between Galactic Outflows Seen in Absorption and Emission Lines
Xinfeng Xu, Alaina Henry, Timothy Heckman +14
Galactic outflows provide important feedback effects to regulate the evolution of host galaxies. Two primary diagnostics of outflows are broad and/or blueshifted emission and absor…
A Simulated Galaxy Laboratory: Exploring the Observational Effects on UV Spectral Absorption Line Measurements
R. Michael Jennings, Alaina Henry, Valentin Mauerhofer +13
Ultraviolet absorption line spectroscopy is a sensitive diagnostic for the properties of interstellar and circumgalactic gas. Down-the-barrel observations, where the absorption is…
Tracing Radio AGN-Driven Quenching in Post-Starburst Galaxies at Cosmic Noon
Pallavi Patil, Kate Rowlands, Katherine Alatalo +14
We present a radio continuum study of photometrically selected cosmic noon (0.5<z<3) post-starburst galaxies (PSBs) in the UKIDSS Deep Survey (UDS) field to assess if radio-mode Ac…
PEARLS: NuSTAR and XMM-Newton Extragalactic Survey of the JWST North Ecliptic Pole Time Domain Field VI: Multiwavelength SED Analysis
Rafael Ortiz, Francesca Civano, Rogier A. Windhorst +27
We model spectral energy distributions of 261 X-ray sources to in the North Ecliptic Pole Time Domain Field, extending prior XMM-Newton and NuSTAR analyses. Using the st…
Shocked POststarburst Galaxy Survey. IV. Outflows in Shocked Post-Starburst Galaxies Are Not Responsible For Quenching
Antoniu Fodor, Taylor Tomko, Mary Braun +13
Shocked POst-starburst Galaxies (SPOGs) exhibit both emission lines suggestive of shock-heated gas and post-starburst-like stellar absorption, resulting in a unique subset for gala…
CLASSY XII: Nitrogen Enrichment Shaped by Gas Density and Feedback
Karla Z. Arellano-Córdova, Danielle A. Berg, Matilde Mingozzi +25
We investigate the chemical evolution of N/O using a sample of 45 local star-forming galaxies (SFGs) from the CLASSY survey. This sample spans a wide range of galaxy properties, wi…
First results from the JWST Early Release Science Program Q3D: Turbulent times in the life of a extremely red quasar revealed by NIRSpec IFU
Dominika Wylezalek, Andrey Vayner, David S. N. Rupke +20
Extremely red quasars, with bolometric luminosities exceeding erg s, are a fascinating high-redshift population that is absent in the local universe. They are the…
First results from the JWST Early Release Science Program Q3D: Powerful quasar-driven galactic scale outflow at
Andrey Vayner, Nadia L. Zakamska, Yuzo Ishikawa +25
Quasar-driven galactic outflows are a major driver of the evolution of massive galaxies. We report observations of a powerful galactic-scale outflow in a extremely red, intri…
The COS Legacy Archive Spectroscopy SurveY (CLASSY) Treasury Atlas
Danielle A. Berg, Bethan L. James, Teagan King +46
Far-ultraviolet (FUV; ~1200-2000 angstroms) spectra are fundamental to our understanding of star-forming galaxies, providing a unique window on massive stellar populations, chemica…
The Low-Redshift Lyman Continuum Survey I: New, Diverse Local Lyman-Continuum Emitters
Sophia R. Flury, Anne E. Jaskot, Harry C. Ferguson +44
The origins of Lyman continuum (LyC) photons responsible for the reionization of the universe are as of yet unknown and highly contested. Detecting LyC photons from the epoch of re…
Nitrogen Production in Starburst Galaxies Detected by GALEX
Ryan P. Mallery, Lisa Kewley, R. Michael Rich +22
We investigate the production of nitrogen in star forming galaxies with ultraviolet (UV) radiation detected by the Galaxy Evolution Explorer Satellite (GALEX). We use a sample of 8…
CLASSY XI: Tracing Neutral Gas Properties using UV Absorption Lines and 21-cm Observations
Kaelee S. Parker, Danielle A. Berg, Simon Gazagnes +15
Rest-frame far-ultraviolet (FUV) observations from JWST are revolutionizing our understanding of the high-z galaxies that drove reionization and the mechanisms by which they accomp…
A Chandra observation of the ultraluminous infrared galaxy IRAS 19254--7245 (the Superantennae): X-ray emission from the Compton-thick AGN and the diffuse starburst
Jianjun Jia, Andrew Ptak, Timothy Heckman +2
We present a {\it Chandra} observation of IRAS 19254--7245, a nearby ULIRG also known as {\it the Superantennae}. The high spatial resolution of {\it Chandra} allows us to disentan…
CLASSY III: The Properties of Starburst-Driven Warm Ionized Outflows
Xinfeng Xu, Timothy Heckman, Alaina Henry +18
We report the results of analyses of galactic outflows in a sample of 45 low-redshift starburst galaxies in the COS Legacy Archive Spectroscopic SurveY (CLASSY), augmented by five…
The morphology and kinematics of the gaseous circumgalactic medium of Milky Way mass galaxies -- II. comparison of IllustrisTNG and Illustris simulation results
Guinevere Kauffmann, Dylan Nelson, Sanchayeeta Borthakur +5
We have carried out a controlled comparison of the structural and kinematic properties of the circumgalactic medium (CGM) around Milky Way mass galaxies in the Illustris and Illust…
Stellar Population in LLAGN.I: Ground-based observations
Roberto Cid Fernandes, Rosa M. Gonzalez Delgado, Henrique Schmitt +6
(Abridge): We present a spectroscopic study of the stellar populations of Low Luminosity AGN (LLAGN). Our main goal is to determine whether the stars who live in the innermost (100…
Lighting Up the CGM: Strong, Jet-Aligned Emission around Radio Galaxies
Namrata Roy, Sanchayeeta Borthakur, Timothy Heckman +1
A primary question within galaxy evolution is how active galactic nuclei (AGN) feedback modifies the circumgalactic medium (CGM). We present a search for faint H emission from…
Stellar Population in LLAGN.II: STIS observations
Rosa M. Gonzalez Delgado, Roberto Cid Fernandes, Enrique Perez +5
We present a study of the stellar population in Low Luminosity AGN (LLAGN). Our goal is to search for spectroscopic signatures of young and intermediate age stars, and to investiga…
Empirical determination of the shape of dust attenuation curves in star-forming galaxies
Vivienne Wild, Stephane Charlot, Jarle Brinchmann +4
We present a systematic study of the shape of the dust attenuation curve in star-forming galaxies from the far ultraviolet to the near infrared (0.15-2microns), as a function of sp…
Unprecedented Constraints on Gas Flows at High Redshift Using Deep JWST/NIRSpec Observations from the LyC22, EXCELS, and AURORA Surveys
Emily Kehoe, Alice E. Shapley, Adam C. Carnall +25
We investigate how low-ionization gas flows in typical star-forming galaxies at depend on galaxy intrinsic properties and viewing angle. For this analysis we use JWST/NIRS…
Lower-Luminosity Obscured AGN Host Galaxies are Not Predominantly in Major-Merging Systems at Cosmic Noon
Erini Lambrides, Marco Chiaberge, Timothy Heckman +15
For over 60 years, the scientific community has studied actively growing central super-massive black holes (active galactic nuclei -- AGN) but fundamental questions on their genesi…
Evidence for the Accretion of Gas in Star-Forming Galaxies: High N/O Abundances in Regions of Anomalously-Low Metallicity
Yuanze Luo, Timothy Heckman, Hsiang-Chih Hwang +11
While all models for the evolution of galaxies require the accretion of gas to sustain their growth via on-going star formation, it has proven difficult to directly detect this inf…
Timing the starburst-AGN connection
Vivienne Wild, Timothy Heckman, Stephane Charlot
The mass of super massive black holes at the centre of galaxies is tightly correlated with the mass of the galaxy bulges which host them. This observed correlation implies a mechan…
The short and long of iPhoton science for a boosted Hubble
Stephan R. McCandliss, Jack Ford, Anne E. Jaskot +7
Boosting the Hubble Space Telescope (HST) will provide unique opportunities to carry out precursor science for the Habitable Worlds Observatory (HWO). Chief among them are science…
Physical Origins of Outflowing Cold Clouds in Local Star-forming Dwarf Galaxies
Zixuan Peng, Crystal L. Martin, Zirui Chen +10
We study the physical origins of outflowing cold clouds in a sample of 14 low-redshift dwarf ( ) galaxies from the COS Legacy Archive Spectros…
First results from the JWST Early Release Science Program Q3D: The Warm Ionized Gas Outflow in z ~ 1.6 Quasar XID 2028 and its Impact on the Host Galaxy
Sylvain Veilleux, Weizhe Liu, Andrey Vayner +26
Quasar feedback may regulate the growth of supermassive black holes, quench coeval star formation, and impact galaxy morphology and the circumgalactic medium. However, direct evide…
Spatially Resolved Physical Properties of Young Star Clusters and Star-forming Clumps in the Brightest z>6 Galaxy, the Strongly Lensed Cosmic Spear at z=6.2
Abdurro'uf, Dan Coe, Tom Resseguier +49
We present spatially resolved analysis of stellar populations in the brightest galaxy known to date (AB mag 23), the strongly lensed MACS0308zD1 (dubbed the ``Cosmic Spear…
Pulling back the curtain on shocks and star-formation in NGC 1266 with Gemini-NIFS
Justin Atsushi Otter, Katherine Alatalo, Kate Rowlands +21
We present Gemini near-infrared integral field spectrograph (NIFS) K-band observations of the central 400 pc of NGC 1266, a nearby (D30 Mpc) post-starburst galaxy with a p…
Equilibrium Star Formation In A Constant Q Disk: Model Optimisation and Initial Tests
Zheng Zheng, Gerhardt Meurer, Timothy Heckman +2
We develop a model for the distribution of the ISM and star formation in galaxies based on recent studies that indicate that galactic disks stabilise to a constant stability parame…
Synergistic Radiative Transfer Modeling of MgII and Lyα Emission in Multiphase, Clumpy Galactic Environments: Application to Low-Redshift Lyman Continuum Leakers
Zhihui Li, Max Gronke, Timothy Heckman +9
We conducted systematic radiative transfer (RT) modeling of the Mg II doublet line profiles for 33 low-redshift Lyman continuum (LyC) leakers, and Ly modeling for a subset of s…
Tracing Lyman-alpha and Lyman Continuum Escape in Galaxies with Mg II Emission
Xinfeng Xu, Alaina Henry, Timothy Heckman +29
Star-forming galaxies are considered the likeliest source of the H I ionizing Lyman Continuum (LyC) photons that reionized the intergalactic medium at high redshifts. However, abov…
A complete census of AGN and their hosts from optical surveys?
Vivienne Wild, Timothy Heckman, Paule Sonnentrucker +6
Large optical surveys provide an unprecedented census of galaxies in the local Universe, forming an invaluable framework into which more detailed studies of objects can be placed.…
The Metal Content of Dwarf Starburst Winds: Results from Chandra Observations of NGC 1569
Crystal Martin, Henry Kobulnicky, Timothy Heckman
(Abridged) We present deep, Chandra spectral imaging of the dwarf starburst galaxy NGC 1569. The unprecedented spatial resolution allows us to spatially identify the components of…
A Multiwavelength Evaluation of AGN in the Post-Starburst Phase
Yuanze Luo, Kate Rowlands, Katherine Alatalo +14
The quenching of star formation is a crucial phase in galaxy evolution. Although active galactic nuclei (AGN) feedback has been proposed as a key driver of this transition, the lac…
Synthetic spectra of H Balmer and HeI absorption lines. II: Evolutionary synthesis models for starburst and post-starburst galaxies
Rosa M. Gonzalez Delgado, Claus leitherer, Timothy Heckman
We present evolutionary stellar population synthesis models to predict the spectrum of a single-metallicity stellar population, with a spectral sampling of 0.3 A in five spectral r…
The Impact of Starbursts on the Circumgalactic Medium
Sanchayeeta Borthakur, Timothy Heckman, David Strickland +2
We present a study exploring the impact of a starburst on the properties of the surrounding circum-galactic medium (CGM): gas located beyond the galaxy's stellar body and extending…
CLASSY XIV: The Nitrogen Exception -- Multi-Phase Enrichment and Feedback in High- Analogs
Bethan L. James, Valentina Abril-Melgarejo, Karla Z. Arellano-Córdova +13
We present a first-of-its-kind analysis of the metal content across two interstellar medium (ISM) phases in a sample of 31 local star-forming galaxies from the COS Legacy Archive S…
Ultraviolet-Optical observations of the Seyfert 2 Galaxies NGC 7130, NGC 5135 and IC 3639: Implications for the Starburst-AGN Connection
Rosa M. Gonzalez Delgado, Timothy Heckman, Claus Leitherer +5
We present and discuss HST (WFPC2 and FOC) images and UV GHRS spectra plus ground-based near UV through to near IR spectra of three Seyfert 2 nuclei (NGC 7130, NGC 5135 and IC 3639…
DIISC-III: Signatures of Stellar Disk Growth in Nearby Galaxies
Mansi Padave, Sanchayeeta Borthakur, Hansung B. Gim +8
We explore the growth of the stellar disks in 14 nearby spiral galaxies as part of the Deciphering the Interplay between the Interstellar medium, Stars, and the Circumgalactic medi…
Forming Stars in a Dual AGN Host: Molecular and Ionized Gas in the Nearby, Luminous Infrared Merger, Mrk 266
Damien Beaulieu, Andreea Petric, Carmelle Robert +5
We present star formation rates based on cold and ionized gas measurements of Mrk 266 (NGC 5256), a system composed of two colliding gas-rich galaxies, each hosting an active galac…
An Archival Chandra and XMM-Newton Survey of Type 2 Quasars
Jianjun Jia, Andrew Ptak, Timothy Heckman +1
(Abridged) We analyzed the {\it Chandra} and {\it XMM-Newton} archival observations for 72 type 2 quasars at . These objects were was selected based on the [O III]5007 opt…
The formation of bulges and black holes: lessons from a census of active galaxies in the SDSS
Guinevere Kauffmann, Timothy Heckman
We examine the relationship between galaxies, supermassive black holes and AGN using a sample of 22,000 narrow-emission-line AGN drawn from a a sample of 122,000 galaxies from the…
The Effect of Radiation and Supernovae Feedback on LyC Escape in Local Star-forming Galaxies
Cody A. Carr, Renyue Cen, Claudia Scarlata +25
Feedback is widely recognized as an essential condition for Lyman continuum (LyC) escape in star-forming galaxies. However, the mechanisms by which galactic outflows clear neutral…
MSA-3D: Uncovering Weak AGNs and Resolved Outflows in Disguise in Star-Forming Galaxies
Namrata Roy, Alaina Henry, Tucker Jones +11
We present spatially resolved rest-optical spectroscopy of 38 star-forming galaxies at 0.5 < z < 1.7 from the JWST/NIRSpec MSA-3D survey, which uses slit-stepping to build IFU-like…
The Massive Stellar Content in the Starburst NGC3049: A Test for Hot-Star Mode
Rosa M. Gonzalez Delgado, Claus Leitherer, Grazyna Stasinka +1
We have obtained high-spatial resolution ultraviolet and optical STIS spectroscopy and imaging of the metal-rich nuclear starburst in NGC3049. The stellar continuum and the absorpt…
CLASSY II: A technical Overview of the COS Legacy Archive Spectroscopic SurveY
Bethan L. James, Danielle A. Berg, Teagan King +45
The COS Legacy Archive Spectroscopic SurveY (CLASSY) is designed to provide the community with a spectral atlas of 45 nearby star-forming galaxies which were chosen to cover simila…
Detection of a Multiphase Intragroup Medium: Results from the COS-IGrM Survey
Tyler McCabe, Sanchayeeta Borthakur, Timothy Heckman +3
We present the results of the COS Intragroup Medium (COS-IGrM) Survey that used the Cosmic Origins Spectrograph on the Hubble Space Telescope to observe a sample of 18 UV bright qu…
Interaction-induced star formation in a complete sample of 10^5 nearby star-forming galaxies
Cheng Li, Guinevere Kauffmann, Timothy Heckman +2
We investigate the clustering properties of a complete sample of 10^5 star-forming galaxies drawn from the SDSS DR4. On scales less than 100 kpc, the amplitude of the correlation f…
Power-law Emission-line Wings and Radiation-Driven Superwinds in Local Lyman Continuum Emitters
Lena Komarova, Sally Oey, Rui Marques-Chaves +27
We investigate broad emission-line wings, reaching , observed in 26 galaxies with Lyman continuum (LyC) observations, primarily from the Low-redshift Lyman C…
Lyman Continuum leakage from massive leaky starbursts: A different class of emitters?
Namrata Roy, Timothy Heckman, Alaina Henry +11
The origin of Lyman Continuum (LyC) photons responsible for reionizing the universe remains a mystery, with the fraction of escaping LyC photons from galaxies at z 6 to 12 be…
Optical vs. infrared studies of dusty galaxies and AGN: (I) Nebular emission lines
Vivienne Wild, Brent Groves, Timothy Heckman +6
Optical nebular emission lines are commonly used to estimate the star formation rate of galaxies and the black hole accretion rate of their central active nucleus. The accuracy of…
What are the Radial Distributions of Density, Outflow Rates, and Cloud Structures in the M 82 Wind?
Xinfeng Xu, Timothy Heckman, Michitoshi Yoshida +2
Galactic winds play essential roles in the evolution of galaxies through the feedback they provide. Despite intensive studies of winds, the radial distributions of their properties…
Chandra Observations of the Evolving Core of the Starburst Galaxy NGC 253
Kimberly Weaver, Timothy Heckman, David Strickland +1
Chandra observations of the core of the nearby starburst galaxy NGC 253 reveal a heavily absorbed source of hard X-rays embedded within the nuclear starburst region. The source has…
CLASSY VI: Density, Structure and Size of Galactic Outflows
Xinfeng Xu, Timothy Heckman, Alaina Henry +12
Galaxy formation and evolution are regulated by the feedback from galactic winds. Absorption lines provide the most widely available probe of winds. However, since most data only p…
The Low-Redshift Lyman Continuum Survey: The Roles of Stellar Feedback and ISM Geometry in LyC Escape
Sophia R. Flury, Anne E. Jaskot, Alberto Saldana-Lopez +30
One of the fundamental questions of cosmology is the origin and mechanism(s) responsible for the reionization of the Universe beyond . To address this question, many studie…
Mergers, Radio Jets, and Quenching Star-Formation in Massive Galaxies: Quantifying their Synchronized Cosmic Evolution & Assessing the Energetics
Timothy Heckman, Namrata Roy, Philip Best +1
The existence of a population of massive quiescent galaxies with little to no star-formation poses a challenge to our understanding of galaxy evolution. The physical process that q…
A Multiwavelength view of IC 860: What Is in Action inside Quenching Galaxies
Yuanze Luo, Kate Rowlands, Katherine Alatalo +15
We present a multiwavelength study of IC 860, a nearby post-starburst galaxy at the early stage of transitioning from blue and star-forming to red and quiescent. Optical images rev…
Merger or Not: Accounting for Human Biases in Identifying Galactic Merger Signatures
Erini Lambrides, Duncan J. Watts, Marco Chiaberge +9
Significant galaxy mergers throughout cosmic time play a fundamental role in theories of galaxy evolution. The widespread usage of human classifiers to visually assess whether gala…
The Role of Nuclear Starburst in Luminous Infrared Seyfert 2 Galaxies
Rosa Gonzalez Delgado, Timothy Heckman
We present HST (WFPC2 and FOC) images and UV GHRS spectra plus ground-based optical spectra of four Luminous Infrared Galaxies (LIRGs) that have Seyfert 2 nuclei (Mrk 477, NGC 7130…
Kinematically Coherent Multiphase Galactic Winds in Star-Forming Galaxies Revealed by Unified Radiative Transfer Modeling of UV Emission and Absorption Lines
Zhihui Li, Timothy Heckman, Max Gronke +8
We present PEACOCK, a three-dimensional Monte Carlo radiative transfer (RT) framework designed to self-consistently model rest-frame ultraviolet emission and absorption lines arisi…
Is a minor-merger driving the nuclear activity in the Seyfert 2 galaxy NGC 2110?
Rosa M. Gonzalez Delgado, Santiago Arribas, Enrique Perez +1
We report on a detailed morphological and kinematic study of the isolated non-barred nearby Seyfert 2 galaxy NGC 2110. We combine Integral Field optical spectroscopy, with long-sli…
Multivariate Predictors of LyC Escape I: A Survival Analysis of the Low-redshift Lyman Continuum Survey
Anne E. Jaskot, Anneliese C. Silveyra, Anna Plantinga +19
To understand how galaxies reionized the universe, we must determine how the escape fraction of Lyman Continuum (LyC) photons (fesc) depends on galaxy properties. Using the z~0.3 L…
First results from the JWST Early Release Science Program Q3D: The Fast Outflow in a Red Quasar at z=0.44
Weizhe Liu, Sylvain Veilleux, Swetha Sankar +26
Quasar feedback may play a key role in the evolution of massive galaxies. The dust-reddened quasar, F2M110648.35480712 at is one of the few cases at its redshift th…
The Low-Redshift Lyman Continuum Survey II: New Insights into LyC Diagnostics
Sophia R. Flury, Anne E. Jaskot, Harry C. Ferguson +44
The Lyman continuum (LyC) cannot be observed at the epoch of reionization (z {\gtrsim} 6) due to intergalactic H I absorption. To identify Lyman continuum emitters (LCEs) and infer…
The Prevalence of Turbulence-Regulated Multiphase Galactic Winds in Star-Forming Galaxies
Zhihui Li, Timothy Heckman, Max Gronke +8
We build upon our previously developed multi-ion radiative transfer (RT) framework, PEACOCK, to investigate the kinematic and energetic structure of cool-to-warm galactic winds in…
JWST Reveals Powerful Feedback from Radio Jets in a Massive Galaxy at z = 4.1
Namrata Roy, Timothy Heckman, Roderik Overzier +11
We report observations of a powerful ionized gas outflow in a z = 4.1 luminous () radio galaxy TNJ1338-1942 hosting an obscured quasar usi…
Young and Intermediate Stellar population in Seyfert 2 galaxies
Rosa M. Gonzalez Delgado, Timothy Heckman, Claus Leitherer
We present and discuss near-ultraviolet and optical ground-based spectra of the 20 brightest Seyfert 2 nuclei, and HST ultraviolet images and ultraviolet spectroscopy for a few of…
CLASSY VII Lyα Profiles: The Structure and Kinematics of Neutral Gas and Implications for LyC Escape in Reionization-Era Analogs
Weida Hu, Crystal L. Martin, Max Gronke +22
Lyman-alpha line profiles are a powerful probe of ISM structure, outflow speed, and Lyman continuum escape fraction. In this paper, we present the Ly line profiles of the COS L…
Indirect Evidence for Escaping Ionizing Photons in Local Lyman Break Galaxy Analogs
Rachael Alexandroff, Timothy Heckman, Sanchayeeta Borthakur +2
A population of early star-forming galaxies is the leading candidate for the re-ionization of the universe. It is still unclear what conditions and physical processes would enable…
The Multi-Object, Fiber-Fed Spectrographs for SDSS and the Baryon Oscillation Spectroscopic Survey
Stephen Smee, James E. Gunn, Alan Uomoto +61
We present the design and performance of the multi-object fiber spectrographs for the Sloan Digital Sky Survey (SDSS) and their upgrade for the Baryon Oscillation Spectroscopic Sur…
Emission-line Diagnostics of Low Metallicity AGN
Brent Groves, Timothy Heckman, Guinevere Kauffmann
Current emission-line based estimates of the metallicity of active galactic nuclei (AGN) at both high and low redshifts indicate that AGN have predominantly solar to supersolar met…
Supernovae Driven Winds Impede Lyman Continuum Escape from Dwarf Galaxies in First 10 Myr
Cody Carr, Renyue Cen, Stephan McCandliss +25
Observations suggest that UV-bright, compact star-forming galaxies produce enough ionizing (Lyman continuum; LyC) photons to reionize the Universe. Yet, the efficiency of LyC escap…
DIISC -- VI (COS-DIISC): UV Metal Absorption Relative to the H I disk of Galaxies
Brad Koplitz, Sanchayeeta Borthakur, Timothy Heckman +5
As part of the Deciphering the Interplay between the Interstellar medium, Stars, and the Circumgalactic medium (DIISC) survey, we present the UV metal absorption features in the Ci…
Clumpy, dense gas in the outflow of NGC 1266
Justin Atsushi Otter, Katherine Alatalo, Kate Rowlands +23
Outflows are one of the most spectacular mechanisms through which active galactic nuclei (AGN) impact their host galaxy, though the role of AGN-driven outflows in global star forma…
A systematic study of the inner rotation curves of galaxies observed as part of the GASS and COLD GASS surveys
Guinevere Kauffmann, Mei-ling Huang, Sean Moran +1
We present a systematic analysis of the rotation curves of 187 galaxies with masses greater than 10^10 M_sol, with atomic gas masses from the GALEX Arecibo Sloan Survey (GASS), and…
Detectors and cryostat design for the SuMIRe Prime Focus Spectrograph (PFS)
James E. Gunn, Michael Carr, Stephen A. Smee +20
We describe the conceptual design of the camera cryostats, detectors, and detector readout electronics for the SuMIRe Prime Focus Spectrograph (PFS) being developed for the Subaru…
CLASSY XIII. Cutting through the Clouds - Comparing Indirect Tracers of Ionizing Photon Escape
Kaelee S. Parker, Danielle A. Berg, John Chisholm +25
The Epoch of Reionization (EoR) provides critical insights into the role of early galaxies in shaping the ionization state of the universe. However, because of the opacity of the i…
The JWST EXCELS survey: Insights into the nature of quenching at cosmic noon
Maya Skarbinski, Kate Rowlands, Katherine Alatalo +19
We study 24 massive quiescent galaxies with at with JWST/NIRSpec medium-resolution observations from the Early eXtragalactic C…
Lyman continuum observations across cosmic time: recent developments, future requirements
Stephan R. McCandliss, Daniela Calzetti, Henry C. Ferguson +19
Quantifying the physical conditions that allow radiation emitted shortward of the hydrogen ionization edge at 911.7 Ã to escape the first collapsed objects and ultimately reionize…
On the Structure and Morphology of the `Diffuse Ionized Medium' in Star-Forming Galaxies
Jing Wang, Timothy Heckman, Matthew Lehnert
Deep H images of a sample of nearby late-type spiral galaxies have been analyzed to characterize the morphology and energetic significance of the ``Diffuse Ionized Medium'' (DI…
Linking Mg II and [O II] spatial distribution to ionizing photon escape in confirmed LyC leakers and non-leakers
Floriane Leclercq, John Chisholm, Wichahpi King +29
The geometry of the neutral gas in and around galaxies is a key regulator of the escape of ionizing photons. We present the first statistical study aiming at linking the neutral an…
DIISC-II: Unveiling the Connections between Star Formation and ISM in the Extended Ultraviolet Disk of NGC 3344
Mansi Padave, Sanchayeeta Borthakur, Hansung B. Gim +6
We present our investigation of the Extended Ultraviolet (XUV) disk galaxy, NGC 3344, conducted as part of Deciphering the Interplay between the Interstellar medium, Stars, and the…
Resolved Molecular Gas Observations of MaNGA Post-starbursts Reveal a Tumultuous Past
Justin Atsushi Otter, Kate Rowlands, Katherine Alatalo +24
Post-starburst galaxies (PSBs) have recently and rapidly quenched their star-formation, thus they are an important way to understand how galaxies transition from star-forming late-…
The Co-Evolution of Galaxies and Supermassive Black Holes: Insights from Surveys of the Contemporary Universe
Timothy Heckman, Philip Best
We summarize what large surveys of the contemporary universe have taught us about the physics and phenomenology of the processes that link the formation and evolution of galaxies a…
Multivariate Predictors of LyC Escape II: Predicting LyC Escape Fractions for High-Redshift Galaxies
Anne E. Jaskot, Anneliese C. Silveyra, Anna Plantinga +19
JWST is uncovering the properties of ever increasing numbers of galaxies at z>6, during the epoch of reionization. Connecting these observed populations to the process of reionizat…
Extragalactic Science, Cosmology and Galactic Archaeology with the Subaru Prime Focus Spectrograph (PFS)
Masahiro Takada, Richard Ellis, Masashi Chiba +27
The Subaru Prime Focus Spectrograph (PFS) is a massively-multiplexed fiber-fed optical and near-infrared 3-arm spectrograph (N_fiber=2400, 380<lambda<1260nm, 1.3 degree diameter Fo…
The Small-scale Structures in the Wind of Messier 82
Yucheng Guo, Timothy Heckman, Sanchayeeta Borthakur +10
Small-scale multiphase structure plays a central role in galactic-wind evolution, yet the parsec-scale morphology and excitation of the warm ionised gas remain poorly constrained.…
Resolving the Unresolved Galactic Winds in Multi-phase Models. I. Methodology and Application
Xinfeng Xu, Drummond Fielding, Timothy Heckman +12
Galactic winds shape galaxy evolution; however, the outflowing gas is complex: it consists of multiple ionization phases, and its properties vary spatially. Therefore, methods that…
DIISC Survey: Deciphering the Interplay Between the Interstellar Medium, Stars, and the Circumgalactic Medium Survey
Sanchayeeta Borthakur, Mansi Padave, Timothy Heckman +13
We present the Deciphering the Interplay between the Interstellar medium, Stars, and the Circumgalactic medium (DIISC) Survey. This survey is designed to investigate the correlatio…
MusE GAs FLOw and Wind (MEGAFLOW) XIV: Background-Galaxy Absorption Reveals Kiloparsec-Scale Structure in the Cool Circumgalactic Medium
Yucheng Guo, Nicolas F. Bouché, Martin Wendt +9
The properties of the cool (~K) gas in the circumgalactic medium (CGM) are closely linked to the physical mechanisms that create and maintain this multiphase medium. The…
COS-Burst: Observations of the Impact of Starburst-Driven Winds on the Properties of the Circum-Galactic Medium
Timothy Heckman, Sanchayeeta Borthakur, Vivienne Wild +2
We report on observations made with the Cosmic Origins Spectrograph (COS) on the Hubble Space Telescope (HST) using background QSOs to probe the circum-galactic medium (CGM) around…
DIISC-IV: DIISCovery of Anomalously Low Metallicity H II Regions in NGC 99: Indirect Evidence of Gas Inflows
Alejandro J. Olvera, Sanchayeeta Borthakur, Mansi Padave +6
As a part of the Deciphering the Interplay between the Interstellar medium, Stars, and the Circumgalactic medium (DIISC) survey, we investigate indirect evidence of gas inflow into…
Narrow associated QSO absorbers: clustering, outflows and the line-of-sight proximity effect
Vivienne Wild, Guinevere Kauffmann, Simon White +8
Using data from the Sloan Digital Sky Survey data release 3 (SDSS DR3) we investigate how narrow (<700km/s) CIV and MgII quasar absorption line systems are distributed around quasa…
Galaxies with Background QSOs, I: A Search for Strong Galactic H-alpha Lines
Donald G. York, Lorrie A. Straka, Michael Bishof +12
A search for emission lines in foreground galaxies in quasar spectra (z(gal) < z(QSO)) of the Sloan Digital Sky Survey (SDSS) data release 5 (DR5) reveals 23 examples of quasars sh…
CLASSY V: The impact of aperture effects on the inferred nebular properties of local star-forming galaxies
Karla Z. Arellano-Córdova, Matilde Mingozzi, Danielle A. Berg +23
Strong nebular emission lines are an important diagnostic tool for tracing the evolution of star-forming galaxies across cosmic time. However, different observational setups can af…
The Low-Redshift Lyman Continuum Survey: Optically Thin and Thick Mg II Lines as Probes of Lyman Continuum Escape
Xinfeng Xu, Alaina Henry, Timothy Heckman +14
The Mg II 2796, 2803 doublet has been suggested to be a useful indirect indicator for the escape of Ly-alpha and Lyman continuum (LyC) photons in local star-forming galaxies. Howev…
CLASSY VIII: Exploring the Source of Ionization with UV ISM diagnostics in local High- Analogs
Matilde Mingozzi, Bethan L. James, Danielle A. Berg +27
In the current JWST era, rest-frame UV spectra play a crucial role in enhancing our understanding of the interstellar medium (ISM) and stellar properties of the first galaxies in t…
The Complex X-ray Obscuration Environment in the Radio Loud Type 2 Quasar 3C 223
Stephanie M. LaMassa, Tahir Yaqoob, Panayiotis Tzanavaris +4
3C 223 is a radio loud, Type 2 quasar at with an intriguing XMM-Newton spectrum that implicated it as a rare, Compton-thick ( cm$^…
A Large Population of Obscured AGN in Disguise as Low Luminosity AGN in Chandra Deep Field South
Erini Lambrides, Marco Chiaberge, Timothy Heckman +3
Population synthesis models of actively accreting super-massive black holes (or active galactic nuclei -- AGN) predict a large fraction that must grow behind dense, obscuring scree…