activity
20042026
most citedObservational Properties of Simulated Galaxies in Overdense and Average Regions at High Redshifts z= 6-12

42 citations · 63 across the 19 of their papers we have counts for

collaborators

20 papers

astro-ph.GA2026

Probing Spatial Variations in IGM Transmission: Higher Ly Visibility in an H-Selected Galaxy Overdensity at

Shunta Shimizu, Nobunari Kashikawa, Junya Arita +13

The visibility of Ly emission during the epoch of reionization depends on both galaxy properties and the transmission of Ly photons through the intergalactic medium (IGM). Us…

astro-ph.GA2026

Cosmic ray heating of cold streams: Implications for the gas supply and growth of massive galaxies

Ellis R. Owen, Nicolas Ledos, Evangelia Ntormousi +3

Recent observations have demonstrated the presence of cosmic rays (CRs) in cosmic-web filaments. Cold streams supply gas inflows from these filaments into massive galaxies during t…

astro-ph.IM2026

GREX-PLUS Science Book v2

PLUS Science Team, Shunsuke Baba, Sirio Belli +52

GREX-PLUS (Galaxy Reionization EXplorer and PLanetary Universe Spectrometer) is a mission candidate for a JAXA strategic L-class mission to be launched in the 2030s. Its primary sc…

astro-ph.GA2026

The AGORA High-resolution Galaxy Simulations Comparison Project. IX - Part 2: Effects of a Major Galaxy Merger on the Stellar Morphology of a Milky Way-mass Galaxy Progenitor

Thinh Huu Nguyen, Kirk S. S. Barrow, Minyong Jung +23

Galaxy mergers, with their high sensitivity to initial conditions, provide a valuable setting for comparative studies of galaxy simulation codes. Following our first paper focusing…

astro-ph.GA2026

The AGORA High-resolution Galaxy Simulations Comparison Project. IX - Part 1: Effects of a Major Galaxy Merger on Star Formation of a Milky Way-mass Galaxy Progenitor

Thinh Huu Nguyen, Kirk S. S. Barrow, Minyong Jung +23

Given their highly nonlinear dynamics and sensitivity to initial conditions, galaxy mergers are a compelling area to conduct a simulation code comparison. We perform a comparative…

astro-ph.IM2026

MORFEO: Advancing Towards Final Design

Lorenzo Busoni, Guido Agapito, Marco Bonaglia +106

The Multiconjugate adaptive Optics Relay For ELT Observations (MORFEO) is a first-generation adaptive optics module for the Extremely Large Telescope (ELT), designed to deliver a d…

astro-ph.GA2026

The Thesan-Zoom project: bursty star formation is incompatible with prolonged dust survival

Enrico Garaldi, Filip Popovic, Rahul Kannan +11

Cosmic dust is a key regulator of galaxy evolution, but its build-up and survival in the first billion years remain poorly constrained. We present a systematic analysis of dust in…

astro-ph.GA2026

Subaru meets JWST: A Direct Measurement of Ly Escape Fraction at with Dual Narrow-Band Imaging

Shunta Shimizu, Nobunari Kashikawa, Ryo Emori +15

We present a direct measurement of the Ly escape fraction, , for H emitters (HAEs) at in the JWST CEERS field by combining JWST/NIRCam F47…

astro-ph.CO2025

Cosmic Himalayas in CROCODILE : Probing the Extreme Quasar Overdensities by Count-in-Cells analysis and Nearest Neighbor Distribution

Yuto Kuwayama, Yongming Liang, Kentaro Nagamine +7

The recently reported Cosmic Himalayas (CH) -- an extreme quasar overdensity at z~2 -- poses an apparent challenge to the Lambda CDM framework, with a reported significance of 16.9…

astro-ph.GA2025★ 3 cited

The AGORA High-resolution Galaxy Simulations Comparison Project. X: Formation and Evolution of Galaxies at the High-redshift Frontier

Hyeonyong Kim, Ji-hoon Kim, Minyong Jung +22

Recent observations from JWST have revealed unexpectedly luminous galaxies, exhibiting stellar masses and luminosities significantly higher than predicted by theoretical models at…

astro-ph.GA2025

EMPRESS. XV. A New Determination of the Primordial Helium Abundance Suggesting a Moderately Low Value

Hiroto Yanagisawa, Masami Ouchi, Akinori Matsumoto +18

We present a new constraint on the primordial helium abundance, , based on Subaru observations. A major source of uncertainty in previous determination…

astro-ph.GA2025★ 10 cited

The AGORA High-Resolution Galaxy Simulations Comparison Project VII: Satellite quenching in zoom-in simulation of a Milky Way-mass halo

R. Rodríguez-Cardoso, S. Roca-Fàbrega, Minyong Jung +19

Context: Satellite galaxies experience multiple physical processes when interacting with their host halos, often leading to the quenching of star formation. In the Local Group (LG)…

astro-ph.GA2025★ 4 cited

The AGORA High-resolution Galaxy Simulations Comparison Project. VIII: Disk Formation and Evolution of Simulated Milky Way Mass Galaxy Progenitors at

Minyong Jung, Ji-hoon Kim, Thinh H. Nguyen +24

We investigate how differences in the stellar feedback produce disks with different morphologies in Milky Way-like progenitors over 1 , using eight state-of-the-art…

astro-ph.GA2025

Bridging Theory and Observations: Insights into Star Formation Efficiency and Dust Attenuation in Galaxies

Daisuke Toyouchi, Hidenobu Yajima, Andrea Ferrara +1

We investigate early galaxy evolution by modeling self-consistently their radially-resolved evolution of gas, stars, heavy elements, and dust content. Our model successfully reprod…

astro-ph.GA2024

EMPRESS. X. Spatially resolved mass-metallicity relation in extremely metal-poor galaxies: evidence of episodic star-formation fueled by a metal-poor gas infall

Kimihiko Nakajima, Masami Ouchi, Yuki Isobe +47

Using the Subaru/FOCAS IFU capability, we examine the spatially resolved relationships between gas-phase metallicity, stellar mass, and star-formation rate surface densities (Sigma…

astro-ph.GA2024★ 2 cited

Magnetising galaxies with cold inflows

Nicolas Ledos, Evangelia Ntormousi, Shinsuke Takasao +1

High-redshift () galaxies accrete circumgalactic gas through cold streams. Recent high-resolution MHD simulations of these streams showed a significant amplification of t…

astro-ph.GA2024★ 2 cited

Strong He I Emission Lines in High N/O Galaxies at Identified in JWST Spectra: High He/H Abundance Ratios or High Electron Densities?

Hiroto Yanagisawa, Masami Ouchi, Kuria Watanabe +14

We present HeI/H-flux and He/H-abundance ratios in three JWST galaxies with significant constraints on N/O-abundance ratios, GS-NDG-9422, RXCJ2248-ID, and GLASS150008 at $z\sim…

astro-ph.GA2024

Cosmic Himalayas: The Highest Quasar Density Peak Identified in a 10,000 deg Sky with Spatial Discrepancies between Galaxies, Quasars, and IGM HI

Yongming Liang, Masami Ouchi, Dongsheng Sun +27

We report the identification of a quasar overdensity in the BOSSJ0210 field, dubbed Cosmic Himalayas, consisting of 11 quasars at , the densest overdensity of quasars…

astro-ph.GA2014★ 42 cited

Observational Properties of Simulated Galaxies in Overdense and Average Regions at High Redshifts z= 6-12

Hidenobu Yajima, Isaac Shlosman, Emilio Romano-Diaz +1

We use high-resolution zoom-in cosmological simulations of galaxies of Romano-Diaz et al., post-processing them with a panchromatic three-dimensional radiation transfer code to obt…

astro-ph2004

Massive galaxies at redshift 2 in cosmological hydrodynamic simulations

Kentaro Nagamine, Renyue Cen, Lars Hernquist +2

We study the properties of galaxies at z=2 in a Lambda cold dark matter universe, using two different types of hydrodynamic simulation methods -- Eulerian TVD and smoothed particle…