Yonsei University

The Redshifts from 122 Bands: Comparative Redshift Forecast for Low-Resolution Spectra from SPHEREx and 7-Dimensional Sky Survey (7DS)

Jangho Bae, Bomee Lee, Myungshin Im +21

The recently initiated SPHEREx and 7DS surveys will deliver low-resolution spectra ( $R \approx 30 - 130$ ) for hundreds of millions of galaxies over the optical to near-infrared range…

photoD with Rubin's Data Preview 1: first stellar photometric distances and deficit of faint blue stars. Stellar distances with Rubin's DP1

L. Palaversa, E. Donev, Ž. Ivezić +96

Aims: We investigate the utility of Rubin's Data Preview 1 for estimating stellar number density profile in the Milky Way halo. Methods: Stellar broad-band near-UV to near-IR $ugri…

Statistics of the projected angles between the black-hole spin and the host-galaxy rotation axes from NewHorizon

Sebastien Peirani, Yasushi Suto, Clotilde Laigle +3

Understanding the alignment between AGN jets and their host galaxies is crucial for interpreting AGN unification models, jet feedback processes, and the co-evolution of galaxies an…

The MALATANG survey: star formation, dense gas, and AGN feedback in NGC 1068

Shuting Lin, Siyi Feng, Zhi-Yu Zhang +14

We aim to investigate the interplay between dense molecular gas, star formation, and active galactic nucleus (AGN) feedback in the luminous infrared galaxy (LIRG) NGC 1068 at sub-k…

Searching for EeV photons with Telescope Array Surface Detector and neural networks

Telescope Array Collaboration, R. U. Abbasi, T. Abu-Zayyad +126

Ultra-high-energy photons play an important role in probing astrophysical models and beyond-Standard-Model scenarios. We report updated limits on the diffuse photon flux using Tele…

astro-ph.GA2025★ 4 cited

Multiphase Astrophysics to Unveil the Virgo Environment (MAUVE)

Barbara Catinella, Luca Cortese, Jiayi Sun +26

The Multiphase Astrophysics to Unveil the Virgo Environment (MAUVE) project is a multi-facility programme exploring how dense environments transform galaxies. Combining a VLT/MUSE…

Stellar halos of bright central galaxies II: Scaling relations, colors and metallicity evolution with redshift

Emanuele Contini, Marilena Spavone, Rossella Ragusa +2

We study the formation and evolution of stellar halos (SHs) around bright central galaxies (BCGs), focusing on their scaling relations, colors, and metallicities across cosmic time…

MEGATRON: the impact of non-equilibrium effects and local radiation fields on the circumgalactic medium at cosmic noon

Corentin Cadiou, Harley Katz, Martin P. Rey +22

We present three cosmological radiation-hydrodynamic zoom simulations of the progenitor of a Milky Way-mass galaxy from the MEGATRON suite. The simulations combine on-the-fly radia…

Living with Neighbors. V. Better-aligned Spiral+Spiral Galaxy Pairs Show Stronger Star Formation

Woong-Bae G. Zee, Jun-Sung Moon, Sanjaya Paudel +1

Enhanced star formation (SF) with star-forming neighboring galaxies bolsters hydrodynamical contributions during paired interactions. Although the relative spin orientation between…

CHILES X: Molecular and atomic gas at intermediate redshift

Kelley M. Hess, John Hibbard, Jennifer Donovan Meyer +10

We present ALMA CO observations of 14 HI-detected galaxies from the CHILES survey found in a cosmic over-density at z~0.12. This is the largest collection of spatially resolved CO…

MEGATRON: Reproducing the Diversity of High-Redshift Galaxy Spectra with Cosmological Radiation Hydrodynamics Simulations

Harley Katz, Martin P. Rey, Corentin Cadiou +21

We present the MEGATRON suite of cosmological radiation hydrodynamics simulations following the formation of Milky Way-mass galaxies from the earliest cosmic epochs when Population…

astro-ph.GA2025★ 4 cited

MEGATRON: The environments of Population III stars at Cosmic Dawn and their connection to present day galaxies

Anatole Storck, Harley Katz, Julien Devriendt +7

We present results of Pop. III formation in the MEGATRON suite of simulations, which self-consistently follows radiation and non-equilibrium chemistry, and resolves gas at near-pc…

astro-ph.GA2025★ 8 cited

MEGATRON: Disentangling Physical Processes and Observational Bias in the Multi-Phase ISM of High-Redshift Galaxies

Nicholas Choustikov, Harley Katz, Alex J. Cameron +10

Now detected out to redshifts of $z \sim 14.5$ , the rest-frame ultraviolet and optical spectra of galaxies encode numerous physical properties of the interstellar medium (ISM). Accu…

MEGATRON: how the first stars can create an iron metallicity plateau in the smallest dwarf galaxies

Martin P. Rey, Harley Katz, Corentin Cadiou +23

We study the stellar mass-iron metallicity relation of dwarf galaxies in the new high-resolution MEGATRON cosmological radiation-hydrodynamics simulations. These simulations model…

Uncertainties in high- $z$ galaxy properties inferred from SED fitting using JWST NIRCam photometry

Jiyoung Choe, Taysun Kimm, Harley Katz +4

Numerous high- $z$ galaxies have recently been observed with JWST, providing new insights into early galaxy evolution. Their physical properties are typically derived through spectr…

astro-ph.GA2025★ 4 cited

Hector Galaxy Survey: Data Processing, Quality Control and Early Science

S. Oh, M. L. P. Gunawardhana, S. M. Croom +52

The Hector Galaxy Survey is a new optical integral field spectroscopy (IFS) survey currently using the AAT to observe up to 15,000 galaxies at low redshift ( $z < 0.1$ ). The Hector…

SDSS-C4 3028: The Nearest Blue Galaxy Cluster Devoid of an Intracluster Medium

Shweta Jain, Yuanyuan Su, Andra Stroe +9

SDSS-C4 3028 is a galaxy cluster at $z = 0.061$ , notable for its unusually high fraction of star-forming galaxies with 19 star-forming and 11 quiescent spectroscopically-confirmed me…

Dwarf galaxies in the MATLAS Survey: Hubble Space Telescope observations of nuclear star clusters

Mélina Poulain, Francine R. Marleau, Pierre-Alain Duc +8

In dwarf galaxies, nuclear star clusters (NSCs) are believed to primarily form from the migration and merger of globular clusters (GCs), with a possible contribution from in-situ s…

An isolated early-type dwarf galaxy that ran away from the group environment

Sanjaya Paudel, Cristiano G. Sabiu, Suk-Jin Yoon +2

Understanding the quenching mechanisms in dwarf galaxies is crucial for constraining models of galaxy formation and evolution. In this vein, isolated dwarf galaxies offer valuable…

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…

Unveiling the nature and fate of the almost-dark cloud AGC 226178 through HI mapping

Yu-Zhu Sun, Hong-Xin Zhang, Elias Brinks +18

The origin of extragalactic, almost dark HI clouds with extreme gas-to-stellar mass ratios remains poorly understood. We investigate the nature and fate of the "almost dark" cloud…

VERTICO IX: Signatures of environmental processing of the gas in Virgo cluster spiral galaxies through mapping of CO isotopologues

Timothy A. Davis, Toby Brown, Maria J. Jimenez-Donaire +12

In this work we study CO isotopologue emission in the largest cluster galaxy sample to date: 48 VERTICO spiral galaxies in Virgo. We show for the first time in a significant sample…

astro-ph.GA2025★ 5 cited

Introducing NewCluster: the first half of the history of a high-resolution cluster simulation

San Han, Sukyoung K. Yi, Yohan Dubois +8

We introduce NewCluster, a new high-resolution cluster simulation designed to serve as the massive halo counterpart of the modern cosmological galaxy evolution framework. The zoom-…