199 citations · 3.7k across the 72 of their papers we have counts for
24 papers · 1 filter
Reionization with star-forming galaxies: insights from the Low-z Lyman Continuum Survey
Maxime Trebitsch, Pratika Dayal, John Chisholm +18
The fraction of ionizing photons escaping from galaxies, , is at the same time a crucial parameter in modelling reionization and a very poorly known quantity, especially a…
DUVET: Spatially Resolved Observations of Star Formation Regulation via Galactic Outflows in a Starbursting Disk Galaxy
Bronwyn Reichardt Chu, Deanne B. Fisher, Alberto D. Bolatto +14
We compare 500~pc scale, resolved observations of ionised and molecular gas for the starbursting disk galaxy IRAS08339+6517, using measurements from KCWI and NOEMA. We…
The VANDELS survey: the ionizing properties of star-forming galaxies at using deep rest-frame ultraviolet spectroscopy
A. Saldana-Lopez, D. Schaerer, J. Chisholm +13
To better understand the ionizing properties of galaxies in the EoR, we investigate deep, rest-frame ultraviolet (UV) spectra of star-forming galaxies at $3 \leq z \le…
The Ionizing Spectra of Extremely Metal-Poor O Stars: Constraints from the Only HII Region in Leo P
O. Grace Telford, Kristen B. W. McQuinn, John Chisholm +1
Metal-poor, star-forming dwarf galaxies produce extreme nebular emission and likely played a major role in cosmic reionization. Yet, determining their contribution to the high-reds…
The connection between galactic outflows and the escape of ionizing photons
Ramesh Mainali, Jane R. Rigby, John Chisholm +13
We analyze spectra of a gravitationally lensed galaxy, known as the Sunburst Arc, that is leaking ionizing photons, also known as the Lyman continuum (LyC). Magnification from grav…
An extreme blue nugget, UV-bright starburst at z=3.613 with ninety per cent of Lyman continuum photon escape
R. Marques-Chaves, D. Schaerer, J. Alvarez-Marquez +9
We present the discovery and analysis of J1316+2614 at z=3.6130, a UV-bright star-forming galaxy () with large escape of Lyman continuum (LyC) radiation. J…
CLASSY IV: Exploring UV diagnostics of the interstellar medium in local high- analogs at the dawn of the JWST era
Matilde Mingozzi, Bethan L. James, Karla Z. Arellano-Córdova +22
The COS Legacy Archive Spectroscopic SurveY (CLASSY) HST/COS treasury program provides the first high-resolution spectral catalogue of 45 local high-z analogues in the UV (1200-200…
CLusters in the Uv as EngineS (CLUES): I. Survey presentation \& FUV spectral analysis of the stellar light
M. Sirressi, A. Adamo, M. Hayes +17
The CLusters in the Uv as EngineS (CLUES) survey is a Cosmic Origins Spectrograph (COS) campaign aimed at acquiring the 1130 to 1770 Å, restframe spectroscopy of very young (<20 My…
A JWST/NIRCam Study of Key Contributors to Reionization: The Star-forming and Ionizing Properties of UV-faint Galaxies
Ryan Endsley, Daniel P. Stark, Lily Whitler +5
Spitzer/IRAC imaging has revealed that the brightest galaxies often exhibit young ages and strong nebular line emission, hinting at high ionizing efficiency among early…
A First Look at the Abundance Pattern -- O/H, C/O, and Ne/O -- in Galaxies with JWST/NIRSpec
Karla Z. Arellano-Córdova, Danielle A. Berg, John Chisholm +9
We analyze the rest-frame near-UV and optical nebular spectra of three galaxies from the Early Release Observations taken with the Near-Infrared Spectrograph (NIRSpec) on t…
Understanding the spatial variation of \ion{Mg}{II} and ionizing photon escape in a local LyC leaker
Thomas Seive, John Chisholm, Floriane Leclercq +1
Ionizing photons must have escaped from high-redshift galaxies, but the neutral high-redshift intergalactic medium makes it unlikely to directly detect these photons during the Epo…
The Far-Ultraviolet Continuum Slope as a Lyman Continuum Escape Estimator at High-redshift
J. Chisholm, A. Saldana-Lopez, S. Flury +25
Most of the hydrogen in the intergalactic medium (IGM) was rapidly ionized at high-redshifts. While observations have established that reionization occurred, observational constrai…
Lyman alpha and Lyman continuum emission of MgII-selected star-forming galaxies
Y. I. Izotov, J. Chisholm, G. Worseck +3
We present observations with the Cosmic Origins Spectrograph onboard the Hubble Space Telescope of seven compact low-mass star-forming galaxies at redshifts, z,in the range 0.3161-…
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…
No correlation of the Lyman continuum escape fraction with spectral hardness
R. Marques-Chaves, D. Schaerer, R. O. Amorín +25
The properties that govern the production and escape of hydrogen ionizing photons (Lyman continuum, LyC; with energies >13.6 eV) in star-forming galaxies are still poorly understoo…
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…
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…
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 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 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…
Strong Lyman continuum emitting galaxies show intense CIV 1550 emission
D. Schaerer, Y. I. Izotov, G. Worseck +7
Using the Space Telescope Imaging Spectrograph, we have obtained ultraviolet (UV) spectra from to 2000 Å of known Lyman continuum (LyC) emitting galaxies at low redshif…
The DUVET Survey: Resolved Maps of Star Formation Driven Outflows in a Compact, Starbursting Disk Galaxy
Bronwyn Reichardt Chu, Deanne B. Fisher, Nikole M. Nielsen +9
We study star formation driven outflows in a starbursting disk galaxy, IRAS08339+6517, using spatially resolved measurements from the Keck Cosmic Web Imager (KCWI). We…
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…
The Low-Redshift Lyman Continuum Survey. Unveiling the ISM properties of low- Lyman continuum emitters
Alberto Saldana-Lopez, Daniel Schaerer, John Chisholm +24
Combining 66 ultraviolet (UV) spectra and ancillary data from the Low-Redshift Lyman Continuum Survey (LzLCS) and 23 LyC observations by earlier studies, we form a statistical samp…