R. Naidu

GLIMPSE-D: An Exotic Balmer-Jump Object at z=6.20? Revisiting Photometric Selection and the Cosmic Abundance of Pop III Galaxies

Seiji Fujimoto, Yoshihisa Asada, Rohan P. Naidu +19

We present deep JWST/NIRSpec G395M spectroscopy of GLIMPSE-16043, a promising $z \sim 6$ Pop III candidate originally identified through NIRCam photometry as having weak [OIII]$λ\lam…

Lyman- $α$ Visibility During the Epoch of Reionization: Combining JWST FRESCO Grism Data with Keck Archival Spectroscopy

Ecaterina Leonova, Rohan P. Naidu, Pascal A. Oesch +5

The visibility of Lyman- $α$ emission at $z > 7$ provides crucial insights into the reionization process and the role of galaxies in shaping the ionized intergalactic medium. Using JW…

Little red dot variability over a century reveals black hole envelope via a giant Einstein cross

Zijian Zhang, Mingyu Li, Masamune Oguri +79

"Little red dots" (LRDs) represent a new population of astronomical objects uncovered by JWST whose nature remains debated. Although many LRDs are suspected as active galactic nucl…

VENUS: When Red meets Blue -- A multiply imaged Little Red Dot with an apparent blue companion behind the galaxy cluster Abell 383

Miriam Golubchik, Lukas J. Furtak, Joseph F. V. Allingham +50

We report the discovery of a doubly-imaged Little Red Dot (LRD) candidate behind the galaxy cluster Abell 383, which we dub A383-LRD1. Initially classified as a dropout galaxy in H…

astro-ph.CO2025

The Mass-Metallicity Relation and its Observational Effects at z~3-6

Zach Lewis, Michael V. Maseda, Anna de Graaff +21

The correlation between galaxy stellar mass and gas-phase metallicity, known as the mass-metallicity relation (MZR), gives key insights into the processes that govern galaxy evolut…

astro-ph.GA2025★ 4 cited

Rapid, out of equilibrium metal enrichment indicated by a flat mass-metallicity relation at z~6 from NIRCam grism spectroscopy

Gauri Kotiwale, Jorryt Matthee, Daichi Kashino +17

We aim to characterise the mass-metallicity relation (MZR) and the 3D correlation between stellar mass, metallicity and star-formation rate (SFR) known as the fundamental metallici…

The Deepest GLIMPSE of a Dense Gas Cocoon Enshrouding a Little Red Dot

Vasily Kokorev, John Chisholm, Rohan P. Naidu +19

The detection of strong Balmer breaks and absorption features in Little Red Dots (LRDs) suggests they host AGN embedded within dense gas envelopes, potentially powered by super-Edd…

astro-ph.EP2025

Searching for Exoplanets Born Outside the Milky Way: VOYAGERS Survey Design

Robert Aloisi, Andrew Vanderburg, Melinda Soares-Furtado +44

Observations over the past few decades have found that planets are common around nearby stars in our Galaxy, but little is known about planets that formed outside the Milky Way. We…

astro-ph.GA2025★ 3 cited

JWST's GLIMPSE: an overview of the deepest probe of early galaxy formation and cosmic reionization

Hakim Atek, John Chisholm, Vasily Kokorev +44

We present an overview of the JWST GLIMPSE program, highlighting its survey design, primary science goals, gravitational lensing models, and first results. GLIMPSE provides ultra-d…

Little Red Dots host Black Hole Stars: A unified family of gas-reddened AGN revealed by JWST/NIRSpec spectroscopy

Anna de Graaff, Raphael E. Hviding, Rohan P. Naidu +34

We use the DAWN JWST Archive to construct and characterise a sample of 146 little red dots (LRDs) across 2.0<z<9.3, selecting all sources with v-shaped UV-optical continua from NIR…

VENUS: A Strongly Lensed Clumpy Galaxy at $z \sim 11 - 12$ behind the Galaxy Cluster MACS J0257.1-2325

Minami Nakane, Vasily Kokorev, Seiji Fujimoto +75

We present the discovery of a strongly lensed galaxy at $z \sim 11 - 12$ , dubbed the ``Misty Moons'', identified in the JWST Treasury Survey, Vast Exploration for Nascent, Unexplored S…

A Fleeting GLIMPSE of N/O Enrichment at Cosmic Dawn: Evidence for Wolf Rayet N Stars in a z = 6.1 Galaxy

Danielle A. Berg, Rohan P. Naidu, John Chisholm +18

We present the discovery of extreme nitrogen enrichment by Wolf Rayet nitrogen stars (WN) in the metal-poor (~10% Z_odot), lensed, compact (R_eff ~ 20 pc) galaxy RXCJ2248 at z=6.1,…

Where Galaxies Go to Die: The Environments of Massive Quiescent Galaxies at $3 < z < 5$

Ian McConachie, Anna de Graaff, Michael V. Maseda +25

At low redshift, massive quiescent galaxies (MQGs) are most frequently found in massive, rich galaxy clusters, but at high redshift the trend is less clear. Here, we present spectr…

The Blue Jay Survey: Deep JWST Spectroscopy for a Representative Sample of Galaxies at Cosmic Noon

Sirio Belli, Letizia Bugiani, Minjung Park +17

We present the Blue Jay survey, a cycle 1 JWST program aimed at studying the stellar and gas content of galaxies at cosmic noon. The survey consists of deep spectroscopy for 153 ta…

A GLIMPSE of Intermediate Mass Black holes in the epoch of reionization: Witnessing the Descendants of Direct Collapse?

Qinyue Fei, Seiji Fujimoto, Rohan P. Naidu +17

JWST has revealed an abundance of supermassive black holes (BHs) in the early Universe, and yet the lowest mass seed black holes that gave rise to these populations remain elusive.…

The slope and scatter of the star forming main sequence at z~5 : reconciling observations with simulations

Claudia Di Cesare, Jorryt Matthee, Rohan P. Naidu +17

Galaxies exhibit a tight correlation between their star-formation rate and stellar mass over a wide redshift range known as the star-forming main sequence (SFMS). With JWST, we can…

Evolutionary Tracks and Spectral Properties of Quasi-stars and Their Correlation with Little Red Dots

Andrew D. Santarelli, Ebraheem Farag, Earl P. Bellinger +4

JWST has revealed a population of red, compact, high-redshift ( $z \sim 3 - 10$ ) objects referred to as ``Little Red Dots'' (LRDs). These objects exhibit unusual spectral features rem…

astro-ph.GA2025★ 14 cited

EIGER VIII: First stars signatures in the connection between OI absorption and Galaxies in the Epoch of Reionization

Jack Higginson, Rongmon Bordoloi, Robert A. Simcoe +8

We investigate the association between galaxies and neutral OI absorption systems at z~6, which trace metal-enriched gas during the epoch of reionization. We identify 40 galaxies a…

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…

astro-ph.GA2025★ 11 cited

The first GLIMPSE of the faint galaxy population at Cosmic Dawn with JWST: The evolution of the ultraviolet luminosity function across z~9-15

Iryna Chemerynska, Hakim Atek, Lukas J. Furtak +27

Using ultra-deep JWST NIRCam imaging from the GLIMPSE Survey, enhanced by gravitational lensing of the AbellS1063 cluster, we investigate the faintest galaxies ever observed in the…

The Cosmic Rush Hour: Rapid Formation of Bright, Massive, Disky, Star-Forming Galaxies as Signatures of Early-Universe Physics

Xuejian Shen, Oliver Zier, Mark Vogelsberger +4

Early JWST observations have revealed a high-redshift universe more vibrant than predicted by canonical galaxy-formation models within $Λ$ CDM, showing an excess of ultraviolet(UV)-…

What you see is what you get: empirically measured bolometric luminosities of Little Red Dots

Jenny E. Greene, David J. Setton, Lukas J. Furtak +27

New populations of red active galactic nuclei (known as ``Little Red Dots'') discovered by JWST exhibit remarkable spectral energy distributions. Leveraging X-ray through far-infra…

The Light Echo of a High-Redshift Quasar mapped with Lyman- $α$ Tomography

Anna-Christina Eilers, Minghao Yue, Jorryt Matthee +11

Ultra-violet (UV) radiation from accreting black holes ionizes the intergalactic gas around early quasars, carving out highly ionized bubbles in their surroundings. Any changes in…