B. Lemaux

$N a ˉ p o ˉ waw a ˉ ‘enakaulua$ : a close quasar pair at cosmic dawn in the Aether survey

Silvia Onorato, Emanuele Paolo Farina, Roberto Decarli +32

We present the discovery and first characterization of $N a ˉ p o ˉ waw a ˉ ‘enakaulua$ : the most compact known quasar pair candidate in the Epoch of Reionization, with a projected se…

Extreme Enrichment at Cosmic Dawn: Three FeII-Strong Quasars at z > 6 from the JWST Aether survey

Anniek J. Gloudemans, Emanuele Paolo Farina, Roberto Decarli +22

We present three outliers on the quasar main sequence at z>6, as revealed by JWST/NIRSpec IFU observations from the Aether survey, a program targeting ~200 quasars at cosmic dawn.…

Rapid growth in a dual AGN during a gas-rich merger at z~4.5

Hyewon Suh, Roberto Decarli, Emanuele Paolo Farina +15

The late stages of galaxy mergers - when two supermassive black holes (SMBHs) reach kiloparsec-scale separations - represent a critical phase for understanding SMBH growth, galaxy…

When Jets Don't Quench: Near-Infrared H $_{2}$ in Star Forming Low-Excitation Radio Galaxies

Swetha Sankar, Andreea O. Petric, Debora Pelliccia +11

We present new Gemini/GNIRS near-infrared spectroscopic observations of eight low-redshift ( $z < 0.1$ ) blue low-excitation radio galaxies (BLERGs), a rare subset ( $\sim 2.5%$ of l…

Strong environmental AGN enhancement among DSFGs in z > 2 protoclusters

Monica Natalia Isla Llave, Fabio Vito, Alberto Traina +17

Galaxy protoclusters (PCs) at z > 2 are dense regions in which cold gas availability and elevated galaxy interaction rates trigger intense, often dust-obscured, star formation. The…

Two Exciting High-redshift Galaxy Candidates Turn Out to Be Two Exciting Ultra-cool Brown Dwarfs

Maruša Bradač, Chris Willott, Yoshihisa Asada +37

From the onset of observations of JWST we have discovered unexpectedly luminous galaxies at redshifts $z > 10$ and as high as $z = 14$ . With their discovery, the question immediately f…

BlastBerries: How Supernovae Affect Lyman Continuum Escape Fractions and Ionizing Photon Production in Local Analogs of High-Redshift Galaxies

Miranda Y. Kong, David O. Jones, Nicole E. Drakos +16

While compact, star-forming galaxies are believed to play a key role in cosmic reionization, the physical mechanisms enabling the escape of ionizing photons through the galactic in…

LATIS Data Release: $\sim 4200$ Spectra of $z \sim 2 - 3$ Galaxies, Redshifts, and Intergalactic Medium Tomography Maps

Andrew B. Newman, Gwen C. Rudie, Guillermo A. Blanc +8

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…

The ALPINE-CRISTAL-JWST Survey: Stellar and nebular dust attenuation of main-sequence galaxies at z~4-6

Akiyoshi Tsujita, Seiji Fujimoto, Andreas Faisst +39

Characterizing dust attenuation is crucial for revealing the intrinsic physical properties of galaxies. We present an analysis of dust attenuation in 18 spectroscopically confirmed…

Probing the influence of the protocluster environment on galaxy morphology at z = 2.23

Emmet Golden-Marx, Zheng Cai, Dongdong Shi +7

As galaxies evolve in dense cluster and protocluster environments, they interact and quench their star formation, which gradually transforms the galaxy population from star-forming…

astro-ph.GA2025★ 3 cited

The ALPINE-CRISTAL-JWST Survey: NIRSpec IFU Data Processing and Spatially-resolved Views of Chemical Enrichment in Normal Galaxies at z=4-6

Seiji Fujimoto, Andreas L. Faisst, Akiyoshi Tsujita +37

We present a statistical study of spatially resolved chemical enrichment in 18 main-sequence galaxies at $z = 4$ --6, observed with \jwst/NIRSpec IFU as part of the ALPINE-CRISTAL-\jw…

Environmental Regulation of Dust and Star Formation Unveiled by Subaru Dual Narrow-band Imaging: Degree-scale Balmer Decrement Mapping across a z = 0.9 Supercluster

Zhaoran Liu, Tadayuki Kodama, Brian C. Lemaux +13

We present results from a dual narrow-band imaging survey targeting the CL1604 supercluster at z = 0.9 using the Subaru Telescope. By combining the NB921 filter on HSC and the NB12…

LATIS: Galaxy-Environment Relations at Cosmic Noon and the Role of Sample Selection

Nima Chartab, Andrew B. Newman, Gwen C. Rudie +6

We investigate the environmental dependence of galaxy properties at $z \sim 2.5$ using the Ly $α$ Tomography IMACS Survey (LATIS), which provides high-resolution three-dimensional map…

astro-ph.GA2025★ 2 cited

Star Formation under a Cosmic Microscope: Highly magnified z = 11 galaxy behind the Bullet Cluster

Maruša Bradač, Jon Judež, Chris Willott +20

We present measurements of stellar population properties of a newly discovered spectroscopically confirmed $z = 11.1 0_{- 0.26}^{+ 0.11}$ , gravitationally lensed galaxy, using JWST NIRS…

The HST-Hyperion Survey: Environmental Imprints on the Stellar-Mass Function at z~2.5

Derek Sikorski, Ben Forrest, Brian C. Lemaux +19

Not all galaxies at Cosmic Noon evolve in the same way. It remains unclear how the local environment -- especially the extreme overdensities of protoclusters -- affects stellar mas…

astro-ph.GA2025★ 3 cited

The ALPINE-CRISTAL-JWST survey: spatially resolved star formation relations at $z \sim 5$

C. Accard, M. Béthermin, M. Boquien +37

Star formation governs galaxy evolution, shaping stellar mass assembly and gas consumption across cosmic time. The Kennicutt-Schmidt (KS) relation, linking star formation rate (SFR…

A massive and evolved slow-rotating galaxy in the early Universe

Ben Forrest, Adam Muzzin, Danilo Marchesini +15

In the contemporary Universe, most galaxies are supported by ordered rotation, yet a significant subset of the most massive and quiescent systems are dominated by random stellar mo…

astro-ph.GA2025★ 3 cited

LATIS: Comparing Galaxy and IGM Tomography Maps as Tracers of Large-scale Structure and Protoclusters at $z \sim 2.5$

Andrew B. Newman, Nima Chartab, Mahdi Qezlou +11

We investigate the consistency of intergalactic medium (IGM) tomography and galaxy surveys as tracers of the cosmic web and protoclusters at $z \sim 2.5$ . We use maps from the Ly$α…

astro-ph.GA2025★ 4 cited

LATIS: A Sample of IGM-selected Protoclusters and Protogroups at $z \sim 2.5$

Andrew B. Newman, Mahdi Qezlou, Gwen C. Rudie +11

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 $z \sim 2.5$ . A key advantage of L…

A deep dive down the broad-line region: permitted OI, CaII and FeII emission in an AGN Little Red Dot at z=5.3

Roberta Tripodi, Maruša Bradač, Francesco D'Eugenio +27

We present a spectroscopic analysis of a broad-line active galactic nucleus (AGN) selected as little red dot at $z = 5.3$ behind the Bullet cluster (Bz5.3), based on JWST/NIRCam an…

astro-ph.GA2025★ 5 cited

Gas properties as a function of environment in the proto-supercluster Hyperion at z ~ 2.45

G. Gururajan, O. Cucciati, B. C. Lemaux +26

The cosmic star-formation rate density, molecular gas density and the AGN activity of the Universe peak at z~ 2-3, showing the Universe is most active at this epoch. The nature of…

astro-ph.GA2025★ 4 cited

Quantifying the Impact of Incompleteness on Identifying and Interpreting Galaxy Protocluster Populations with the TNG-Cluster Simulation

Devontae C. Baxter, Alison L. Coil, Ethan O. Nadler +7

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 protocluster…