Matthew Hayes
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View article: Power-law Emission-line Wings and Radiation-driven Superwinds in Local Lyman Continuum Emitters
Power-law Emission-line Wings and Radiation-driven Superwinds in Local Lyman Continuum Emitters Open
We investigate broad emission-line wings, reaching ≤800 km s −1 , observed in 26 galaxies with Lyman continuum (LyC) observations, primarily from the Low-redshift Lyman Continuum Survey. Using Magellan/MIKE, Very Large Telescope/X-shooter,…
View article: Parallel Application of Slitless Spectroscopy to Analyze Galaxy Evolution (PASSAGE): Survey Overview
Parallel Application of Slitless Spectroscopy to Analyze Galaxy Evolution (PASSAGE): Survey Overview Open
During the second half of Cycle 1 of the James Webb Space Telescope (JWST), we conducted the Parallel Application of Slitless Spectroscopy to Analyze Galaxy Evolution (PASSAGE) program. PASSAGE received the largest allocation of JWST obser…
View article: The Sunburst Arc with JWST. IV. The importance of interaction, turbulence, and feedback for Lyman-continuum escape
The Sunburst Arc with JWST. IV. The importance of interaction, turbulence, and feedback for Lyman-continuum escape Open
At present, the best opportunity for detailed Lyman Continuum escape studies is in gravitationally lensed galaxies at z >~ 2. Only one such galaxy currently exists in the literature with sufficient spatial magnification: The Sunburst Arc a…
View article: The Parallel Ionizing Emissivity Survey (PIE). I. Survey Design and Selection of Candidate Lyman Continuum Leakers at 3.1 < <i>z</i> < 3.5
The Parallel Ionizing Emissivity Survey (PIE). I. Survey Design and Selection of Candidate Lyman Continuum Leakers at 3.1 < <i>z</i> < 3.5 Open
We present the survey design and initial results from the Parallel Ionizing Emissivity (PIE) survey. PIE is a large Hubble Space Telescope survey designed to detect Lyman continuum (LyC) emitting galaxies at 3.1 < z < 3.5 and stack their i…
View article: Lyman Continuum Leakage from Massive Leaky Starbursts: A Different Class of Emitters?
Lyman Continuum Leakage from Massive Leaky Starbursts: A Different Class of Emitters? Open
The origin of Lyman continuum (LyC) photons responsible for reionizing the Universe remains largely unknown, with the fraction of escaping LyC photons from galaxies at z ∼ 6 to 12 still uncertain. Direct detection of LyC photons from this …
View article: CLASSY XII: nitrogen enrichment shaped by gas density and feedback
CLASSY XII: nitrogen enrichment shaped by gas density and feedback Open
We investigate the chemical evolution of N/O using a sample of 45 local star-forming galaxies from the CLASSY survey. This sample spans a wide range of galaxy properties, with robust determinations of nitrogen and oxygen abundances via the…
View article: Modeling Emission-Line Surface Brightness in a Multiphase Galactic Wind: An O VI Case Study
Modeling Emission-Line Surface Brightness in a Multiphase Galactic Wind: An O VI Case Study Open
We present a fast and robust analytic framework for predicting surface brightness (SB) of emission lines in galactic winds as a function of radius up to $\sim 100$ kpc out in the circum-galactic medium. We model multi-phase structure in ga…
View article: Feedback and dynamical masses in high- <i>z</i> galaxies: the advent of high-resolution NIRSpec spectroscopy
Feedback and dynamical masses in high- <i>z</i> galaxies: the advent of high-resolution NIRSpec spectroscopy Open
Stellar feedback is an essential step in the baryon cycle of galaxies, but it remains unconstrained beyond Cosmic Noon. We study the dynamical mass and gas-flow properties of a sample of 16 sub-$L^{\star }$ star-forming galaxies at $4\le z…
View article: Glimmers in the Cosmic Dawn. II. A Variability Census of Supermassive Black Holes across the Universe<sup>*</sup>
Glimmers in the Cosmic Dawn. II. A Variability Census of Supermassive Black Holes across the Universe<sup>*</sup> Open
Understanding the origin and evolution of supermassive black holes (SMBHs) stands as one of the most important challenges in astrophysics and cosmology, with little current theoretical consensus. Improved observational constraints on the c…
View article: The Ly$α$ and Continuum Origins Survey. III. Investigating the link between galaxy morphology, merger properties and LyC escape
The Ly$α$ and Continuum Origins Survey. III. Investigating the link between galaxy morphology, merger properties and LyC escape Open
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 identify the sources that powered it. The Lyman-alpha and C…
View article: The ambiguous AT2022rze: changing-look AGN mimicking a supernova in a merging galaxy system
The ambiguous AT2022rze: changing-look AGN mimicking a supernova in a merging galaxy system Open
AT2022rze is a luminous, ambiguous transient located south-east of the geometric centre of its host galaxy at redshift $z = 0.08$. The host appears to be formed by a merging galaxy system. The observed characteristics of AT2022rze are remi…
View article: The emergence and ionizing feedback of Pop III.1 stars as progenitors for supermassive black holes
The emergence and ionizing feedback of Pop III.1 stars as progenitors for supermassive black holes Open
Recent observations by James Webb Space Telescope reveal an unexpectedly abundant population of rapidly growing supermassive black holes (SMBHs) in the early Universe, underscoring the need for improved models for their origin and growth. …
View article: CLUES. III. Do User Choices Impact the Results of SED Fitting? Tests of “Off-the-shelf” Stellar Population and Dust Extinction Models in the CLUES Sample
CLUES. III. Do User Choices Impact the Results of SED Fitting? Tests of “Off-the-shelf” Stellar Population and Dust Extinction Models in the CLUES Sample Open
The simple stellar population models produced by stellar population and spectral synthesis (SPS) codes are used as spectral templates in a variety of astrophysical contexts. In this paper, we test the predictions of four commonly used stel…
View article: The Emergence and Ionizing Feedback of Pop III.1 Stars as Progenitors for Supermassive Black Holes
The Emergence and Ionizing Feedback of Pop III.1 Stars as Progenitors for Supermassive Black Holes Open
Recent observations by JWST reveal an unexpectedly abundant population of rapidly growing supermassive black holes (SMBHs) in the early Universe, underscoring the need for improved models for their origin and growth. Employing new full rad…
View article: Identifying the contributors to cosmic reionization with the Habitable World Observatory: LyC escape calibration in faint galaxies
Identifying the contributors to cosmic reionization with the Habitable World Observatory: LyC escape calibration in faint galaxies Open
Investigating how small-scale physical processes shape large-scale astrophysical phenomena is one of the key science themes of the Astro2020 decadal Survey. An example of this interplay is Cosmic Reionization, where ionizing photons from g…
View article: Challenging the LyC–Ly<i>α</i> Relation: Strong Ly<i>α</i> Emitters without LyC Leakage at <i>z</i> ∼ 2.3
Challenging the LyC–Ly<i>α</i> Relation: Strong Ly<i>α</i> Emitters without LyC Leakage at <i>z</i> ∼ 2.3 Open
The escape fraction of Lyman continuum (LyC) ionizing radiation ( ) is crucial for understanding reionization, yet difficult to measure at z ≳ 4. Recently, studies have focused on calibrating indirect indicators of at z ∼ 0…
View article: CLUES III: Do User Choices Impact The Results of SED Fitting? Tests of 'Off-The-Shelf' Stellar Population and Dust Extinction Models in the CLUES Sample
CLUES III: Do User Choices Impact The Results of SED Fitting? Tests of 'Off-The-Shelf' Stellar Population and Dust Extinction Models in the CLUES Sample Open
The simple stellar population models produced by stellar population and spectral synthesis (SPS) codes are used as spectral templates in a variety of astrophysical contexts. In this paper, we test the predictions of four commonly used stel…
View article: Exploring the Mysterious High-ionization Source Powering [Ne<scp> v</scp>] in High-<i>z</i> Analog SBS0335-052 E with JWST/MIRI
Exploring the Mysterious High-ionization Source Powering [Ne<span> v</span>] in High-<i>z</i> Analog SBS0335-052 E with JWST/MIRI Open
Nearby blue compact dwarf galaxies (BCDs) are considered analogs to objects from the Epoch of Reionization revealed by JWST, having similarly low stellar masses, low metallicities, and high specific star formation rates. Thus, they represe…
View article: Systematic Bias in Ionizing Radiation Escape Fraction Measurements from Foreground Large-scale Structures
Systematic Bias in Ionizing Radiation Escape Fraction Measurements from Foreground Large-scale Structures Open
We investigate the relationship between the Ly α forest transmission in the intergalactic medium (IGM) and the environmental density of galaxies, focusing on its implications for the measurement of ionizing radiation escape fractions. Usin…
View article: The Low-redshift Lyman Continuum Survey: The Roles of Stellar Feedback and Interstellar Medium Geometry in LyC Escape
The Low-redshift Lyman Continuum Survey: The Roles of Stellar Feedback and Interstellar Medium Geometry in LyC Escape Open
One of the fundamental questions of cosmology is the origin and mechanism(s) responsible for the reionization of the Universe beyond z ∼ 6. Many studies have focused on Hubble Space Telescope (HST) Cosmic Origins Spectrograph (COS) observa…
View article: The JWST/PASSAGE Survey: Testing Reionization Histories with JWST’s First Unbiased Survey for Ly<i>α</i> Emitters at Redshifts 7.5–9.5
The JWST/PASSAGE Survey: Testing Reionization Histories with JWST’s First Unbiased Survey for Ly<i>α</i> Emitters at Redshifts 7.5–9.5 Open
Ly α emission is one of a few observable features of galaxies that can trace the neutral hydrogen content in the Universe during the Epoch of Reionization (EoR). To accomplish this, we need an efficient way to survey for Ly α emitters (LAE…
View article: BEACON: JWST NIRCam Pure-parallel Imaging Survey. I. Survey Design and Initial Results
BEACON: JWST NIRCam Pure-parallel Imaging Survey. I. Survey Design and Initial Results Open
We introduce the Bias-free Extragalactic Analysis for Cosmic Origins with NIRCam (BEACON) survey, a JWST Cycle 2 program allocated up to 600 pure-parallel hours of observations. BEACON explores high-latitude areas of the sky with JWST/NIRC…
View article: The Sunburst Arc with JWST
The Sunburst Arc with JWST Open
Context. The peculiar object known as Godzilla resides within the gravitationally lensed Sunburst Arc at z = 2.37. Despite being very bright, it appears in only one of the twelve lensed images of the source galaxy, exhibiting unusual spect…
View article: Erratum: “The Impact of Cosmic Variance on Inferences of Global Neutral Fraction Derived from Ly<i>α</i> Luminosity Functions during Reionization” (2023, ApJ, 953, 29)
Erratum: “The Impact of Cosmic Variance on Inferences of Global Neutral Fraction Derived from Ly<i>α</i> Luminosity Functions during Reionization” (2023, ApJ, 953, 29) Open
View article: The Parallel Ionizing Emissivity Survey (PIE). I. Survey design and selection of candidate Lyman Continuum leakers at 3.1
The Parallel Ionizing Emissivity Survey (PIE). I. Survey design and selection of candidate Lyman Continuum leakers at 3.1 Open
We present the survey design and initial results from the Parallel Ionizing Emissivity (PIE) survey. PIE is a large HST survey designed to detect Lyman continuum (LyC) emitting galaxies at 3.1$<$ z $<$3.5 and stack their images in order to…
View article: The Effect of Radiation and Supernovae Feedback on LyC Escape in Local Star-forming Galaxies
The Effect of Radiation and Supernovae Feedback on LyC Escape in Local Star-forming Galaxies Open
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 gas and dust remain unclear. In this paper, we model the Mg…
View article: The JWST/PASSAGE Survey: Testing Reionization Histories with JWST's First Unbiased Survey for Lyman alpha Emitters at Redshifts 7.5-9.5
The JWST/PASSAGE Survey: Testing Reionization Histories with JWST's First Unbiased Survey for Lyman alpha Emitters at Redshifts 7.5-9.5 Open
Lyman $α$ (Ly$α$) emission is one of few observable features of galaxies that can trace the neutral hydrogen content in the Universe during the Epoch of Reionization (EoR). To accomplish this we need an efficient way to survey for Ly$α$ em…
View article: Exploring the mysterious high-ionization source powering [Ne V] in high-z analog SBS0335-052 E with JWST/MIRI
Exploring the mysterious high-ionization source powering [Ne V] in high-z analog SBS0335-052 E with JWST/MIRI Open
Nearby blue compact dwarf galaxies (BCDs) share similar properties with objects from the Epoch of Reionization revealed by JWST, in terms of low stellar mass, low metallicity and high specific star-formation rate. Thus, they represent idea…
View article: The Lyman Continuum Escape Fraction of Star-forming Galaxies at 2.4 ≲ <i>z</i> ≲ 3.0 from UVCANDELS
The Lyman Continuum Escape Fraction of Star-forming Galaxies at 2.4 ≲ <i>z</i> ≲ 3.0 from UVCANDELS Open
The UltraViolet Imaging of the Cosmic Assembly Near-infrared Deep Extragalactic Legacy Survey Fields (UVCANDELS) survey is a Hubble Space Telescope (HST) Cycle-26 Treasury Program, allocated in total 164 orbits of primary Wide-Field Camera…
View article: The Sunburst Arc with JWST. III. An Abundance of Direct Chemical Abundances
The Sunburst Arc with JWST. III. An Abundance of Direct Chemical Abundances Open
We measure the gas-phase abundances of the elements He, N, O, Ne, S, Ar, and Fe in an individual H ii region known to be leaking Lyman-continuum photons in the Sunburst Arc, a highly magnified galaxy at redshift z = 2.37. We detect the tem…