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astro-ph.GA2026

Rest-Frame UV and Optical Structural Evolution of Narrowband-Selected Lyman-alpha Emitters at z = 2-7 with JWST/NIRCam

Ronaldo Laishram, Haruka Kusakabe, Satoshi Kikuta +8

We present a systematic study of the rest-frame ultraviolet (UV) and optical morphologies of Ly emitters (LAEs) at - from the SILVERRUSH multi-narrowband catalog,…

astro-ph.GA2026

Interplay of Compaction, Quenching, and Black Hole Growth in the Most Massive Galaxies since : Insights from JWST and Chandra Data

Novan Saputra Haryana, Masayuki Akiyama, Abdurro'uf +16

The buildup of dense stellar cores is expected to mark an important transition in the star-formation and black-hole growth of massive galaxies. Using spatially resolved spectral en…

astro-ph.GA2026

A Compact Proto-group at : A Massive Galaxy Caught in Formation

Ronaldo Laishram, Yusei Koyama, Fengwu Sun +11

We report the discovery of SCGG-z5, a compact galaxy proto-group at in the MACS0416 field, identified from the SAPPHIRES Early Data Release. Six members are spectroscopi…

astro-ph.GA2026

BEACON: JWST NIRCam Pure-parallel Imaging Survey. III. Constraints on the UV LF and the Clustering of z~7-14 Galaxies

Kimi C. Kreilgaard, Charlotte A. Mason, Takahiro Morishita +21

The James Webb Space Telescope (JWST) has extended the frontier of galaxy detection to redshifts z>11, finding a high abundance of UV-bright sources that challenge theoretical mode…

astro-ph.GA2026

GalSyn I: A Forward-Modeling Code for Synthetic Galaxy Observations from Hydrodynamical Simulations and First Data Release from IllustrisTNG

Abdurro'uf, Henry C. Ferguson, Samir Salim +9

We present GalSyn (Galaxy Synthesizer), a modular and flexible Python package for generating synthetic observations from hydrodynamical galaxy simulations. GalSyn generates synthet…

astro-ph.GA2026

BEACON: JWST NIRCam Pure-parallel Imaging Survey. IV. A Systematic Search for Galaxy Overdensities and Evidence for Gas Accretion Mode Transition

Ryo Albert Sutanto, Takahiro Morishita, Tadayuki Kodama +20

We systematically search for galaxy overdensities using 20 independent fields with a minimum of six filters (F090W, F115W, F150W, F277W, F356W, and F444W) from BEACON, the JWST Cyc…

astro-ph.GA2026

BEACON: JWST NIRCam Pure-parallel Imaging Survey. II. Physical Properties of Galaxies

Yechi Zhang, Takahiro Morishita, Kimi C. Kreilgaard +23

We present photometric properties of 161 galaxy candidates at selected from the second data release (DR2) of BEACON, a JWST Cycle 2 pure-parallel NIRCam imaging program. C…

astro-ph.GA2025

Stellar Mass Assembly History of Massive Quiescent Galaxies since : Insights from Spatially Resolved SED Fitting with JWST Data

Novan Saputra Haryana, Masayuki Akiyama, Abdurro'uf +12

Massive quiescent galaxies at high redshift show significantly more compact morphology than their local counterparts. To examine their internal structure across a wide redshift ran…