N. Leethochawalit

An emerging baryon cycle in a galaxy 500 million years after the Big Bang

Shengzhe Wang, Xin Wang, Hang Zhou +17

The emergence of stellar feedback as a regulator of galaxy growth marks a fundamental transition in cosmic history. At early times, rapid gas accretion and collapse may induce inte…

Assessing Ultra-Cool Dwarf Contamination in Photometrically Selected High-Redshift Galaxy Samples

Onnalin Innala, Nicha Leethochawalit, Takahiro Morishita +1

Ultra-cool dwarf stars (UCDs) are a common source of contamination in high-redshift galaxy searches because both populations have red colors and these early-forming galaxies can ha…

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…

The faint end of the UV luminosity function at $0.4 < z < 0.7$ from the Hubble Frontier Fields

Lei Sun, Xiao-Lei Meng, Xin Wang +7

By extending the Hubble Frontier Fields (HFF) observations to the F225W band using HST WFC3/UVIS, we measure the rest-frame UV luminosity function (LF) of galaxies at $0.4 < z < 0.…

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…

Beyond UV: Rest-frame B-band and Apparent Luminosity Functions of z=5-9 Galaxies

Nicha Leethochawalit, Takahiro Morishita, Tirawut Worrakitpoonpon +1

We present new measurements of galaxy luminosity functions (LFs) from JWST/NIRCam imaging over the redshift range z=4.5-9.7, using photometric catalogs from JADES and public extrag…

BEACON: JWST NIRCam Pure-parallel Imaging Survey. II. Physical Properties of $z = 7 - 14$ Galaxies

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

We present photometric properties of 161 galaxy candidates at $z = 7 - 14$ selected from the second data release (DR2) of BEACON, a JWST Cycle 2 pure-parallel NIRCam imaging program. C…

Accelerated evolution of galaxy host halo masses during Cosmic Dawn from deep JWST clustering

Nicolò Dalmasso, Giovanni Ferrami, Nicha Leethochawalit +2

We present the deepest clustering analysis of early galaxies to date, analyzing $N_{g} ≃ 6500$ photometrically-selected Lyman Break Galaxies from JWST's Advanced Deep Ext…

The GLASS-JWST Early Release Science Program. V. H $α$ luminosity functions at $z \sim 1.3$ and $z \sim 2.0$

Yuxuan Pang, Xin Wang, Tommaso Treu +11

We present H $α$ luminosity function (LF) measurements at redshifts $z \sim 1.3$ and $z \sim 2.0$ using JWST NIRISS grism data from the GLASS-JWST survey. Based on emission lines spectr…

Parallel Application of Slitless Spectroscopy to Analyze Galaxy Evolution (PASSAGE): Survey Overview

Matthew A. Malkan, Vihang Mehta, Ayan Acharyya +49

During the second half of Cycle 1 of the James Webb Space Telescope (JWST), we conducted the Parallel Application of Slitless Spectroscopy to Analyze Galaxy Evolution (PASSAGE) pro…

astro-ph.GA2025★ 1 cited

Spatially resolved gas-phase metallicity at z~2-3 with JWST/NIRISS

Ayan Acharyya, Peter J. Watson, Benedetta Vulcani +24

Spatially resolved gas-phase metallicity maps are a crucial element in understanding the chemical evolution of galaxies. We present spatially resolved metallicity maps obtained fro…

Resolved Stellar and Nebular Kinematics of a Star-forming Galaxy at $z \sim 2$

Sunny Rhoades, Tucker Jones, Keerthi Vasan G. C. +7

The kinematics of star-forming galaxy populations at high redshifts are integral to our understanding of disk properties, merger rates, and other defining characteristics. Nebular…

The JWST/PASSAGE Survey: Testing Reionization Histories with JWST's First Unbiased Survey for Lyman alpha Emitters at Redshifts 7.5-9.5

Axel Runnholm, Matthew J. Hayes, Vihang Mehta +25

Lyman $α$ (Ly $α$ ) emission is one of few observable features of galaxies that can trace the neutral hydrogen content in the Universe during the Epoch of Reionization (EoR). To acco…

astro-ph.GA2024★ 14 cited

Metallicity Scatter Originating from Sub-kiloparsec Starbursting Clumps in the Core of a Protocluster at z=7.88

Takahiro Morishita, Massimo Stiavelli, Eros Vanzella +9

We present new JWST NIRSpec integral field unit (IFU) G395H/F290LP observations of a merging galaxy system at $z = 7.88$ , part of A2744-z7p9, the most distant protocluster to date. T…

astro-ph.CO2024★ 1 cited

A novel analysis of contamination in Lyman-break galaxy samples at $z \sim 6 - 8$ : spatial correlation with intermediate-redshift galaxies at $z \sim 1.3 - 2$

Miftahul Hilmi, Nicha Leethochawalit, Michele Trenti +1

Potential contamination from low/intermediate-redshift galaxies, such as objects with a prominent Balmer break, affects the photometric selection of high-redshift galaxies through…

Early Results from GLASS-JWST. XXV. Electron Density in the Interstellar Medium at $0.7 ≲ z ≲ 9.3$ with NIRSpec High-resolution Spectroscopy

Sijia Li, Xin Wang, Yuguang Chen +17

The electron density ( $n_{e}$ ) of the interstellar medium (ISM) in star-forming galaxies is intimately linked to star formation and ionization condition. Using the high-resol…

What can we learn from the Nitrogen abundance of High-z galaxies?

Massimo Stiavelli, Takahiro Morishita, Marco Chiaberge +9

We present measurements of the gas-phase Oxygen and Nitrogen abundances obtained by applying the direct method to JWST NIRspec $R \sim 1000$ spectroscopy for 6 galaxies at redshift g…

astro-ph.GA2024★ 49 cited

BEACON: JWST NIRCam Pure-parallel Imaging Survey. I. Survey Design and Initial Results

Takahiro Morishita, Charlotte A. Mason, Kimi C. Kreilgaard +32

We introduce the Bias-free Extragalactic Analysis for Cosmic Origins with NIRCam (BEACON) survey, a JWST Cycle2 program allocated up to 600 pure-parallel hours of observations. BEA…

Seven wonders of Cosmic Dawn: JWST confirms a high abundance of galaxies and AGNs at z $≃$ 9-11 in the GLASS field

L. Napolitano, M. Castellano, L. Pentericci +24

We present JWST/NIRSpec PRISM follow-up of candidate galaxies at z=9-11 selected from deep JWST/NIRCam photometry in GLASS-JWST Early Release Science data. We spectroscopically con…

astro-ph.GA2024★ 28 cited

The Dual Nature of GHZ9: Coexisting Active Galactic Nuclei and Star Formation Activity in a Remote X-ray Source at z = 10.145

Lorenzo Napolitano, Marco Castellano, Laura Pentericci +33

We present James Webb Space Telescope (JWST)/NIRSpec PRISM spectroscopic characterization of GHZ9 at z= 10.145 $\pm$ 0.010, currently the most distant source detected by the Chandr…

Detection of gas inflow during the onset of a starburst in a low-mass galaxy at z=2.45

Erin Coleman, Keerthi Vasan G. C., Yuguang Chen +9

The baryon cycle is crucial for understanding galaxy formation, as gas inflows and outflows vary throughout a galaxy's lifetime and affect its star formation rate. Despite the nece…

astro-ph.GA2024★ 9 cited

The BoRG- $J W S T$ Survey: Abundance and Mass-to-light Ratio of Luminous $z = 7 - 9$ Galaxies from Independent Sight Lines with NIRSpec

Sofía Rojas-Ruiz, Micaela B. Bagley, Guido Roberts-Borsani +12

We present new results on the rest-frame UV luminosity function (UVLF) and stellar mass-to-light (M/L) ratio of bright (M $_{UV} ≲ - 20$ mag) spectroscopically-confirmed gal…

The BoRG-JWST Survey: Program Overview and First Confirmations of Luminous Reionization-Era Galaxies from Pure-Parallel Observations

Guido Roberts-Borsani, Micaela Bagley, Sofía Rojas-Ruiz +18

We present the BoRG-JWST survey, a combination of two JWST Cycle 1 programs aimed at obtaining NIRSpec spectroscopy of representative, UV-bright $7 < z < 10$ galaxy candidates across 2…