55 citations · 140 across the 22 of their papers we have counts for
23 papers
Tracing Warm Gas through C IV Radiative Transfer
Jin Lim, Seok-Jun Chang, Max Gronke +3
The C IV resonance doublet is a key tracer of warm gas () within and around galaxies. Recent observations have detected this line in both ab…
The Impact of Circumgalactic Rotation on Ly Radiative Transfer
Hee-Gyeong Kym, Seok-Jun Chang, Max Gronke +1
Hydrogen Lyman-alpha (Ly) is a prominent emission line from the circumgalactic medium (CGM). Due to its resonant nature, Ly carries imprints of the physical properties and ki…
A Cosmic Archipelago of lensed metal-poor galaxies at
A. Bolamperti, M. Messa, A. Zanella +21
The Cosmic Archipelago is an ensemble of galaxies, strongly lensed by the cluster MACSJ0416, showing extreme physical properties at . We combine JWST/NIRCam with deep VL…
SPURS: Evidence for Clumpy Neutral Envelopes and Ionized IGM Surrounding Little Red Dots in Abell 2744 from Ultra-Deep Rest-UV Spectroscopy
Mengtao Tang, Daniel P. Stark, Charlotte A. Mason +14
Rest-frame ultraviolet (UV) spectra of Little Red Dots (LRDs) often show Ly emission. Along with broad Balmer emission, LRDs are expected to produce broad Ly emission. Howeve…
The MUSE Ultra Deep Field (MUDF) VIII. The cool gas distribution surrounding galaxies at redshifts z ~ 0.5-2
Edoardo Santo, Michele Fumagalli, Seok-Jun Chang +5
We use deep MUSE data from the MUDF survey to investigate the cool gas around galaxies at redshifts 0.5 < z < 2. We constructed two samples: one sample for a down-the-barrel analys…
The Engine and its Flows: Little Red Dot spectra are shaped by the column densities of their gas envelopes
Jorryt Matthee, Alberto Torralba, Gabriele Pezzulli +23
JWST data have enabled the abundant identification of compact broad Balmer line sources nicknamed the Little Red Dots. While they share broad lines with active galactic nuclei, the…
The warm outer layer of a Little Red Dot as the source of [Fe II] and collisional Balmer lines with scattering wings
Alberto Torralba, Jorryt Matthee, Gabriele Pezzulli +22
The population of the Little Red Dots (LRDs) may represent a key phase of supermassive black hole (SMBH) growth. A cocoon of dense excited gas is emerging as key component to expla…
Lyman- Escape through Anisotropic Media
Silvia Almada Monter, Max Gronke, Seok-Jun Chang
The escape of Lyman- (Ly) radiation encodes valuable information on the neutral interstellar medium and is often used as a proxy for the escape of ionizing photons. Yet, the…
Impact of Resonance, Raman, and Thomson Scattering on Hydrogen Line Formation in Little Red Dots
Seok-Jun Chang, Max Gronke, Jorryt Matthee +1
Little Red Dots (LRDs) are compact sources at discovered through JWST spectroscopy. Their spectra exhibit broad Balmer emission lines (), alongside…
Simulating realistic Lyman- emitting galaxies including the effect of radiative transfer
Hasti Khoraminezhad, Shun Saito, Max Gronke +1
We present an empirical yet physically motivated simulation of realistic Lyman- emitters (LAEs) at , crucial for ongoing and forthcoming cosmological LAE surveys. We c…
A weak Ly halo for an extremely bright Little Red Dot: Indications of enshrouded SMBH growth
Alberto Torralba, Jorryt Matthee, Gabriele Pezzulli +13
The abundant population of "Little Red Dots" (LRDs)-compact objects with red UV to optical colors and broad Balmer lines at high redshift-is unveiling new insights into the propert…
A "Black Hole Star" Reveals the Remarkable Gas-Enshrouded Hearts of the Little Red Dots
Rohan P. Naidu, Jorryt Matthee, Harley Katz +48
The physical processes that led to the formation of billion solar mass black holes within the first 700 million years of cosmic time remain a puzzle. Several theoretical scenarios…
Disentangling the galactic and intergalactic components in 313 observed Lyman-alpha line profiles between redshift 0 and 5
Siddhartha Gurung-López, Chris Byrohl, Max Gronke +5
Lyman-Alpha (Lya) photons emitted in star-forming galaxies undergo complex radiative transfer through the interstellar (ISM), circumgalactic (CGM), and intergalactic medium (IGM),…
Constraining the geometry of the gas surrounding a typical galaxy at with Ly polarization
A. Bolamperti, S. -J. Chang, J. Vernet +6
Ly emission is the strongest tracer of recombining ionized hydrogen in young, star-forming galaxies, but its origin is still debated. Ly arises when emitted photons scatter i…
zELDA II: reconstruction of galactic Lyman-alpha spectra attenuated by the intergalactic medium using neural networks
Siddhartha Gurung-Lopez, Chris Byrohl, Max Gronke +5
The observed Lyman-Alpha (Lya) line profile is a convolution of the complex Lya radiative transfer taking place in the interstellar, circumgalactic and intergalactic medium (ISM, C…
Modeling Mg II resonance doublet spectra from galaxy haloes at z 1
Seok-Jun Chang, Rajeshwari Dutta, Max Gronke +3
We investigate the properties of cold gas at around star-forming galaxies at using Mg II spectra through radiative transfer modeling. We utilize a comprehen…
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 si…
Deciphering spatially resolved Lyman-alpha profiles in reionization analogs: the Sunburst Arc at cosmic noon
Erik Solhaug, Hsiao-Wen Chen, Mandy C. Chen +7
The hydrogen Lyman-alpha (Lya) emission line, the brightest spectral feature of a photoionized gas, is considered an indirect tracer of the escape of Lyman continuum (LyC) photons,…
Crossing walls and windows: the curious escape of Lyman- photons through ionised channels
Silvia Almada Monter, Max Gronke
The diverse Lyman-alpha (Ly) line profiles are essential probes of gas in and around galaxies. While isotropic models can successfully reproduce a range of Ly observables, th…
Probing cold gas with Mg II and Ly radiative transfer
Seok-Jun Chang, Max Gronke
The Mg II resonance doublet at 2796 Å and 2803 Å is an increasingly important tool to study cold, K, gas -- an observational driven development requiring theoretic…
Directly constraining the spatial coherence of the circumgalactic medium
A. Afruni, S. Lopez, P. Anshul +9
One of the biggest puzzles regarding the circumgalactic medium (CGM) is the structure of its cool ( K) gas phase. While the kinematics of quasar absorption systems sugge…
First Detection and Modeling of Spatially Resolved Ly in TW Hya
Seok-Jun Chang, Nicole Arulanantham, Max Gronke +2
Lyman- (Ly) is the strongest emission line in the accretion-generated UV spectra from T-Tauri stars and, as such, plays a critical role in regulating chemistry within the sur…
Slicing the cool circumgalactic medium along the major-axis of a star-forming galaxy at
S. Lopez, N. Tejos, L. F. Barrientos +13
We present spatially-resolved echelle spectroscopy of an intervening MgII-FeII-MgI absorption-line system detected at toward the giant gravitational arc PSZ1…