Xinfeng Xu

CLASSY. XV. Kinematics and Spatial Distributions of Outflows in Local Highly Star-Forming Galaxies

Mason S. Huberty, Cody A. Carr, Claudia Scarlata +17

Star-forming galaxies drive massive outflows that play an important role in galaxy evolution by regulating feedback and influencing the dynamics of surrounding media. Measuring gal…

Scaling Relations of Galactic Outflows Across Cosmic Time: New Insights from Cosmic Noon

Tiffany Liou, Xinfeng Xu, Allison L. Strom +8

Galactic outflows play a significant role in regulating galaxy evolution. Scaling relations between stellar mass ( $M_{*}$ ), star formation (SFR), and outflow properties have been…

Discovery of four Narrow-line Type-1 Quasars at z = 2.54 -- 6.06 with Subaru 'Onohi'ula PFS-SSP

Ayumi Takahashi, Yoshiki Matsuoka, Yoshiki Toba +21

We report the discovery of four narrow-line type-1 quasars (NLQ1s) from the Subaru 'Onohi'ula Prime Focus Spectrograph Subaru Strategic Program (PFS-SSP). To extend a comprehensive…

The Importance of Galaxy-Wide Star Formation in Driving Winds at z~1

Weichen Wang, Susan A. Kassin, S. M. Faber +11

In this work, we study winds for a representative sample of 86 star-forming galaxies (SFGs) at z~1 with $M_{⋆} = 1 0^{9.0} - 1 0^{11.5} M_{⊙}$ , by measuring the Mg II line profiles…

astro-ph.GA2026★ 1 cited

Galactic Archaeology with the Subaru `Ōnohi`ula Prime Focus Spectrograph Strategic Program

Masashi Chiba, Rosemary F. G. Wyse, Evan N. Kirby +48

The recently commissioned Subaru `Ōnohi`ula Prime Focus Spectrograph (PFS) will obtain spectra from nearly 2,400 fibers that cover 1.24 square degrees. The 360 night Subaru Strateg…

A Comprehensive JWST/NIRSpec Census of Broad-line Active Galactic Nuclei: Faint, Low-mass Accretors and a Population of Little Red Dots

Caroline Baccus, Xinfeng Xu

We present a sample of 227 broad-line active galactic nuclei (BLAGNs), incorporating 148 newly identified sources, spanning a redshift interval from z = 0.8 to 7.2. We analyze spec…

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…

astro-ph.GA2025★ 1 cited

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…

astro-ph.GA2025★ 4 cited

The Ly $α$ and Continuum Origins Survey. III. Investigating the Link between Galaxy Morphology, Merger Properties and LyC Escape

Alexandra Le Reste, Anne E. Jaskot, Jordanne Brazie +20

Characterizing the mechanisms and galaxy properties conducive to the emission and escape of ionizing (LyC) emission is necessary to accurately model the Epoch of Reionization, and…

Spatially Resolving the Fundamental Elements of Reionization in Galaxies

Xinfeng Xu, Stephan McCandliss, Allison Strom +10

Cosmic reionization marks a critical epoch when the first galaxies ionized the intergalactic medium through the escape of Lyman continuum (LyC) radiation. Young, massive star clust…

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…

astro-ph.GA2025★ 1 cited

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 $\leq 800 km s^{- 1}$ , observed in 26 galaxies with Lyman continuum (LyC) observations, primarily from the Low-redshift Lyman C…

astro-ph.GA2025★ 7 cited

The Lyman-alpha and Continuum Origins Survey. I. Survey description and Ly $α$ imaging

Alexandra Le Reste, Claudia Scarlata, Matthew Hayes +25

Understanding the mechanisms driving the escape of ionizing or Lyman continuum (LyC) emission from the interstellar medium of galaxies is necessary to constrain the evolution of re…

astro-ph.GA2024★ 7 cited

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 ( $M_{*} ≲ 1 0^{10}$ $M_{⊙}$ ) galaxies from the COS Legacy Archive Spectros…

astro-ph.GA2024★ 5 cited

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…

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 $α$ modeling for a subset of si…

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 $\sim$ 6 to 12 be…

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…

astro-ph.GA2024★ 1 cited

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 $z \sim 6$ . To address this question, many studie…

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…