B. C. Lemaux
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View article: LATIS Data Release: ∼4200 Spectra of <i>z</i> ∼ 2–3 Galaxies, Redshifts, and Intergalactic Medium Tomography Maps
LATIS Data Release: ∼4200 Spectra of <i>z</i> ∼ 2–3 Galaxies, Redshifts, and Intergalactic Medium Tomography Maps Open
We present the data release of the Ly α Tomography IMACS Survey (LATIS), one of the largest optical spectroscopic surveys of faint high-redshift galaxies. The survey provides 7408 optical spectra of candidate z ∼ 2–3 galaxies and QSOs in t…
View article: LATIS: Galaxy–Environment Relations at Cosmic Noon and the Role of Sample Selection
LATIS: Galaxy–Environment Relations at Cosmic Noon and the Role of Sample Selection Open
We investigate the environmental dependence of galaxy properties at z ∼ 2.5 using the Ly α Tomography IMACS Survey (LATIS), which provides high-resolution three-dimensional maps of intergalactic medium (IGM) overdensity via Ly α forest tom…
View article: A Deep Dive down the Broad-line Region: Permitted O <scp>I</scp> , Ca <scp>II,</scp> and Fe <scp>II</scp> Emission in an Active Galactic Nucleus Little Red Dot at <i>z</i> = 5.3
A Deep Dive down the Broad-line Region: Permitted O <span>I</span> , Ca <span>II,</span> and Fe <span>II</span> Emission in an Active Galactic Nucleus Little Red Dot at <i>z</i> = 5.3 Open
We present a spectroscopic analysis of a broad-line active galactic nucleus (AGN) selected as a little red dot (LRD) at z = 5.3 behind the Bullet cluster (Bz5.3) based on JWST/NIRCam and NIRSpec data. The detection of strong Fe ii , O i , …
View article: LATIS: Galaxy-Environment Relations at Cosmic Noon and the Role of Sample Selection
LATIS: Galaxy-Environment Relations at Cosmic Noon and the Role of Sample Selection Open
We investigate the environmental dependence of galaxy properties at $z\sim2.5$ using the Ly$α$ Tomography IMACS Survey (LATIS), which provides high-resolution three-dimensional maps of intergalactic medium (IGM) overdensity via Ly$α$ fores…
View article: The ALPINE-CRISTAL-JWST survey: Spatially resolved star formation relations at <i>z</i> ∼ 5
The ALPINE-CRISTAL-JWST survey: Spatially resolved star formation relations at <i>z</i> ∼ 5 Open
Context. Star formation governs galaxy evolution, shaping stellar mass assembly and gas consumption across cosmic time. The Kennicutt-Schmidt (KS) relation, linking the star formation rate (SFR) and gas surface densities, is fundamental to…
View article: Quantifying the Impact of Incompleteness on Identifying and Interpreting Galaxy Protocluster Populations with the TNG-Cluster Simulation
Quantifying the Impact of Incompleteness on Identifying and Interpreting Galaxy Protocluster Populations with the TNG-Cluster Simulation Open
We use the TNG-Cluster simulation to investigate how stellar mass and star formation rate (SFR) incompleteness affect the identification of density peaks within galaxy protoclusters at different redshifts. Our analysis focuses on a sample …
View article: Extended enriched gas in a multi-galaxy merger at redshift 6.7
Extended enriched gas in a multi-galaxy merger at redshift 6.7 Open
View article: LATIS: Comparing Galaxy and IGM Tomography Maps as Tracers of Large-scale Structure and Protoclusters at <i>z</i> ∼ 2.5
LATIS: Comparing Galaxy and IGM Tomography Maps as Tracers of Large-scale Structure and Protoclusters at <i>z</i> ∼ 2.5 Open
We investigate the consistency of intergalactic medium (IGM) tomography and galaxy surveys as tracers of the cosmic web and protoclusters at z ∼ 2.5. We use maps from the Ly α Tomography IMACS Survey (LATIS), which trace the distributions …
View article: LATIS: A Sample of IGM-selected Protoclusters and Protogroups at <i>z</i> ∼ 2.5
LATIS: A Sample of IGM-selected Protoclusters and Protogroups at <i>z</i> ∼ 2.5 Open
The Ly α Tomography IMACS Survey (LATIS) has produced large 3D maps of the intergalactic medium (IGM), providing a new window on the cosmic web at z ∼ 2.5. A key advantage of Ly α tomography is that it enables the discovery of overdense re…
View article: The HST-Hyperion Survey: Grism Observations of a <i>z</i> ∼ 2.5 Protosupercluster
The HST-Hyperion Survey: Grism Observations of a <i>z</i> ∼ 2.5 Protosupercluster Open
We present the first results and catalogs from the HST-Hyperion survey. This survey has collected 50 orbits of WFC3/F160W imaging and WFC3/G141 grism spectroscopy in the most overdense regions of the Hyperion protosupercluster at z ∼ 2.45,…
View article: Gas properties as a function of environment in the proto-supercluster Hyperion at <i>z</i> ∼ 2.45
Gas properties as a function of environment in the proto-supercluster Hyperion at <i>z</i> ∼ 2.45 Open
The cosmic star formation rate density, molecular gas density, and active galactic nucleus (AGN) activity of the Universe peak at z ∼2–3, demonstrating the Universe is most active at this epoch. The nature of the galaxies at these redshift…
View article: Quantifying the Impact of Incompleteness on Identifying and Interpreting Galaxy Protocluster Populations with the TNG-Cluster Simulation
Quantifying the Impact of Incompleteness on Identifying and Interpreting Galaxy Protocluster Populations with the TNG-Cluster Simulation Open
We use the TNG-Cluster simulation to investigate how stellar mass and star formation rate (SFR) incompleteness affect the identification of density peaks within galaxy protoclusters at different redshifts. Our analysis focuses on a sample …
View article: Discovering Large-scale Structure at 2 < z < 5 in the C3VO Survey
Discovering Large-scale Structure at 2 < z < 5 in the C3VO Survey Open
The Charting Cluster Construction with VUDS and ORELSE (C3VO) survey is an ongoing imaging and spectroscopic campaign aiming to map out the growth of structure up to z ∼ 5 and was born from the combination of the Visible Multi-Object Spect…
View article: The Discovery and Characterization of Minimoon 2024 PT<sub>5</sub>
The Discovery and Characterization of Minimoon 2024 PT<sub>5</sub> Open
Minimoons are asteroids that become temporarily captured by the Earth–Moon system. We present the discovery of 2024 PT 5 , a minimoon discovered by the Asteroid Terrestrial-impact Last Alert System Sutherland telescope on 2024 August 7. Th…
View article: MAGAZ3NE: Evidence for Galactic Conformity in z ≳ 3 Protoclusters*
MAGAZ3NE: Evidence for Galactic Conformity in z ≳ 3 Protoclusters* Open
We examine the quiescent fractions of massive galaxies in six z ≳ 3 spectroscopically confirmed protoclusters in the COSMOS field, one of which is newly confirmed and presented here. We report the spectroscopic confirmation of MAGAZ3NE J10…
View article: The ALPINE-ALMA [CII] Survey: Unveiling the baryon evolution in the ISM of $z\sim5$ star-forming galaxies
The ALPINE-ALMA [CII] Survey: Unveiling the baryon evolution in the ISM of $z\sim5$ star-forming galaxies Open
Recent observations reveal a rapid dust build-up in high-redshift galaxies (z > 4), challenging current models of galaxy formation. While our understanding of dust production and destruction in the interstellar medium (ISM) is advancing, p…
View article: MAGAZ3NE: Evidence for Galactic Conformity in $z\gtrsim3$ Protoclusters
MAGAZ3NE: Evidence for Galactic Conformity in $z\gtrsim3$ Protoclusters Open
We examine the quiescent fractions of massive galaxies in six $z\gtrsim3$ spectroscopically-confirmed protoclusters in the COSMOS field, one of which is newly confirmed and presented here. We report the spectroscopic confirmation of MAGAZ3…
View article: The discovery and characterization of minimoon 2024 PT$_5$
The discovery and characterization of minimoon 2024 PT$_5$ Open
Minimoons are asteroids that become temporarily captured by the Earth-Moon system. We present the discovery of 2024 PT$_5$, a minimoon discovered by the Asteroid Terrestrial-impact Last Alert System (ATLAS) Sutherland telescope on 2024 Aug…
View article: A super-Eddington-accreting black hole ~1.5 Gyr after the Big Bang observed with JWST
A super-Eddington-accreting black hole ~1.5 Gyr after the Big Bang observed with JWST Open
View article: Discovering Large-Scale Structure at $2
Discovering Large-Scale Structure at $2 Open
The Charting Cluster Construction with VUDS and ORELSE (C3VO) survey is an ongoing imaging and spectroscopic campaign aiming to map out the growth of structure up to $z\sim5$ and was born from the combination of the Visible Multi-Object Sp…
View article: Enhanced AGN Activity in Overdense Galactic Environments at $2 < z < 4$
Enhanced AGN Activity in Overdense Galactic Environments at $2 < z < 4$ Open
We conduct a study on the relationship between galaxy environments and their active galactic nuclei (AGN) activity at high redshifts ($2.010^{12.8}M_\odot$) overdense ($σ_δ>5.0$) peak, normalized with respect to the size of the peak. These…
View article: Environmental Effects on the Stellar Mass Function in a z ∼ 3.3 Overdensity of Galaxies in the COSMOS Field*
Environmental Effects on the Stellar Mass Function in a z ∼ 3.3 Overdensity of Galaxies in the COSMOS Field* Open
We present an analysis of the number density of galaxies as a function of stellar mass (i.e., the stellar mass function (SMF)) in the COSMOS field at z ∼ 3.3, making a comparison between the SMF in overdense environments and the SMF in the…
View article: The ALPINE-ALMA [C <scp>ii</scp>] survey: characterization of spatial offsets in main-sequence galaxies at <i>z</i> ∼ 4–6
The ALPINE-ALMA [C <span>ii</span>] survey: characterization of spatial offsets in main-sequence galaxies at <i>z</i> ∼ 4–6 Open
The morphology of galaxies is shaped by stellar activity, feedback, gas and dust properties, and interactions with surroundings, and can therefore provide insight into these processes. In this paper, we study the spatial offsets between st…
View article: Environmental Effects on the Stellar Mass Function in a z~3.3 Overdensity of Galaxies in the COSMOS Field
Environmental Effects on the Stellar Mass Function in a z~3.3 Overdensity of Galaxies in the COSMOS Field Open
We present an analysis of the number density of galaxies as a function of stellar mass (i.e., the stellar mass function, SMF) in the COSMOS field at z~3.3, making a comparison between the SMF in overdense environments and the SMF in the co…
View article: Ly α emission strength and stellar properties of faint galaxies from 5 &lt; <i>z</i> &lt; 8.2
Ly α emission strength and stellar properties of faint galaxies from 5 < <i>z</i> < 8.2 Open
We present a study on stellar properties of Lyman-alpha (Ly α) emitters at 5 < z < 8.2. We use 247 photometrically selected, lensed, high-redshift, low-luminosity galaxy candidates with spectroscopic follow-up. Of these, 38 are confi…
View article: Feeding Hidden Monsters: a Super-Eddington accreting Black Hole ~1.5 Gyr after the Big Bang
Feeding Hidden Monsters: a Super-Eddington accreting Black Hole ~1.5 Gyr after the Big Bang Open
Recent James Webb Space Telescope (JWST) observations have revealed a surprisingly abundant population of faint, dusty active galactic nuclei (AGNs) at z~4-7. Together with the presence of supermassive black holes (SMBHs) at z>6, this rais…
View article: Studying [C<scp> ii</scp>] emission in low-mass galaxies at <i>z</i> ∼ 7
Studying [C<span> ii</span>] emission in low-mass galaxies at <i>z</i> ∼ 7 Open
We report on a $\rm {[CII]}_{158\mu \rm {m}}$ search using the Atacama Large Millimeter/submillimeter Array (ALMA) on three lensed, confirmed Ly α emitting galaxies at z ∼ 7. Our targets are ultraviolet (UV) faint systems with stellar mass…
View article: The ALPINE-ALMA [CII] survey: Dust emission effective radius up to 3 kpc in the early Universe
The ALPINE-ALMA [CII] survey: Dust emission effective radius up to 3 kpc in the early Universe Open
Aims. Measurements of the size of dust continuum emission are an important tool for constraining the spatial extent of star formation, and hence the buildup of stellar mass. Compact dust emission has generally been observed at cosmic noon …
View article: ALMA-ALPINE [CII] survey: The sub-kpc morphology of three main sequence galaxy systems at <i>z</i> ∼ 4.5 revealed by ALMA
ALMA-ALPINE [CII] survey: The sub-kpc morphology of three main sequence galaxy systems at <i>z</i> ∼ 4.5 revealed by ALMA Open
Context. Going from a redshift of 6 down to nearly 4, galaxies grow rapidly from low-mass galaxies towards the more mature types of massive galaxies seen at cosmic noon. Growth via gas accretion and mergers undoubtedly shape this evolution…
View article: Ly$α$ Emission Strength and Stellar Properties of Faint Galaxies from $5 < z < 8.2$
Ly$α$ Emission Strength and Stellar Properties of Faint Galaxies from $5 < z < 8.2$ Open
We present a study on stellar properties of Lyman-alpha (Ly$α$) emitters at 5 $< z <$ 8.2. We use 247 photometrically-selected, lensed, high-redshift, low luminosity galaxy candidates with spectroscopic follow-up. Of these, 38 are confirme…