366 citations · 1.3k across the 40 of their papers we have counts for
23 papers · 1 filter
Diverse ionized gas conditions in a dynamically hot, interacting galaxy at revealed by JWST/NIRSpec IFU
Ryota Ikeda, Takahiro Morishita, Massimo Stiavelli +1
We present a spatially and spectrally resolved study of an interacting galaxy, Gz9p3 at , using the James Webb Space Telescope NIRSpec/G395H IFU observation with high-spect…
RIOJA. Environmental Effects on Stellar Populations and Ionized Gas in a Protocluster at
Wataru Osone, Takuya Hashimoto, Javier Álvarez-Márquez +23
Protoclusters in the epoch of reionization provide key laboratories for investigating how environment shapes early galaxy formation and evolution, and may also have contributed to…
The Incidence of Large Ionized Bubbles at Redshift 13
Peter Ziwei Hu, Massimo Stiavelli, Colin Norman
Ionized bubbles around the first galaxies link early galaxy growth, ionizing photon escape, intergalactic-medium topology, Lyα visibility, 21 cm structure, and the timing of reioni…
Vision-Language Model Ensembles Achieve Human-Expert Accuracy for Galaxy Merger Classification
Marco Chiaberge, Elias Stengel-Eskin, Massimo Stiavelli +1
Models (VLMs) combined using a Bayesian statistical framework can classify galaxy merger morphologies with accuracy comparable to trained human experts. We deploy 15 VLM classifier…
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…
How Bursty is Star Formation at z>5?
Massimo Stiavelli, Massimo Ricotti
Motivated by observational evidence from JWST and theoretical results from cosmological simulations, we use a simple parametric, phenomenological model to test to what extent burst…
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…
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…
Possible evidence for a pair-instability supernova nature of ultra-early JWST sources
Andrea Ferrara, Stefano Carniani, Takahiro Morishita +1
Recent JWST observations have revealed a population of unexpectedly bright sources at ultra-high redshift (), challenging current models of early galaxy formation. One extr…
A faint M Lyman-continuum leaker candidate in the epoch of reionization: Unprecedented Ly properties at z=5.725
M. Messa, E. Vanzella, T. Morishita +10
We report the unprecedented Ly properties of AMORE6, an extremely metal-poor (), low-mass (), and ultracompact (effec…
A Nitrogen-rich AGN Powering a Large Ionizing Bubble at z=8.63
Takahiro Morishita, Massimo Stiavelli, Charlotte A. Mason +5
We report the detection of Ly in CANUCS-LRD-z8.6, a recently discovered AGN at z = 8.63 by Tripodi et al. (2024), in new NIRSpec/MSA G140H/F070LP observations. We detect broad L…
The BoRG- Survey: Analogs at to the UV-luminous Galaxy Population at
Sofía Rojas-Ruiz, Guido Roberts-Borsani, Takahiro Morishita +7
The population of bright galaxies at discovered by JWST, including the so-called "blue monsters", has been difficult to reconcile with standard galaxy evolution models…
TDCOSMO XXIV. First spatially resolved kinematics of the lens galaxy obtained using JWST-NIRSpec to improve time-delay cosmography
Anowar J. Shajib, Tommaso Treu, Sherry H. Suyu +15
Spatially resolved stellar kinematics has become a key ingredient in time-delay cosmography to break the mass-sheet degeneracy in the mass profile and in turn provide a precise con…
Potential Nitrogen Enrichment via Direct-Collapse Wolf-Rayet Stars in a Star-Forming Galaxy
Yechi Zhang, Takahiro Morishita, Massimo Stiavelli
We present analyses of a nitrogen-enriched star-forming galaxy, ID60001, at based on JWST/NIRSpec MSA spectroscopy and NIRCam photometry. From rest-frame optical emissio…
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 , part of A2744-z7p9, the most distant protocluster to date. T…
A recoiling supermassive black hole in a powerful quasar
Marco Chiaberge, Takahiro Morishita, Matteo Boschini +14
Supermassive black holes (SMBH) are thought to grow through accretion of matter and mergers. Models of SMBH mergers have long suffered the final parsec problem, where SMBH binaries…
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 spectroscopy for 6 galaxies at redshift g…
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…
Accelerated Emergence of Evolved Galaxies in Early Overdensities at
Takahiro Morishita, Zhaoran Liu, Massimo Stiavelli +8
We report the identification of two galaxy overdensities at in the sightline of the galaxy cluster Abell 2744. These overdensities consist of 25 and 17 member galaxies,…
The BoRG- Survey: Abundance and Mass-to-light Ratio of Luminous 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 mag) spectroscopically-confirmed gal…
The First Billion Years, According to JWST
Angela Adamo, Hakim Atek, Micaela B. Bagley +46
With stunning clarity, JWST has revealed the Universe's first billion years. The scientific community is analyzing a wealth of JWST imaging and spectroscopic data from that era, an…
Bright galaxies at Hubble's redshift detection frontier: Preliminary results and design from the redshift z~9-10 BoRG pure-parallel HST survey
V. Calvi, M. Trenti, M. Stiavelli +14
We present the first results and design from the redshift z~9-10 Brightest of the Reionizing Galaxies {\it Hubble Space Telescope} survey BoRG[z9-10], aimed at searching for intrin…
The Grism Lens-Amplified Survey from Space (GLASS). I. Survey overview and first data release
T. Treu, K. B. Schmidt, G. B. Brammer +19
We give an overview of the Grism Lens Amplified Survey from Space (GLASS), a large Hubble Space Telescope program aimed at obtaining grism spectroscopy of the fields of ten massive…