activity
20192026
most citedThe Absence of [CII] 158m Emission in Spectroscopically-Confirmed Galaxies at

72 citations · 126 across the 24 of their papers we have counts for

collaborators

24 papers

astro-ph.GA2026

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…

astro-ph.GA2026

ALMA observations of pre-JWST z ~ 10 galaxy candidates: A CO(J = 9-8) line from a ULIRG at z = 2.54 and revisit of the photometric redshifts with JWST photometry

Suzuka Arai, Yuma Sugahara, Akio K. Inoue +15

We present Atacama Large Millimetre/submillimetre Array (ALMA) observations targeting the [OIII]m line for six galaxy candidates selected with the Hubble Space Tel…

astro-ph.GA2026

DREAMS. JWST Spectroscopy of a Galaxy with an ALMA Dust Continuum Detection: Early Dust, Very High , and a Multi-wavelength [OIII] Ratio Discrepancy

Kana Takechi, Masami Ouchi, Kimihiko Nakajima +10

We present a deep DREAMS JWST/NIRSpec MSA medium-grating spectrum of MACS0416-Y1, a galaxy at with the highest-redshift ALMA dust continuum detection to date, in order to…

astro-ph.GA2025

Probing Infrared eXcess to Investigate Early-Universe Dust (PIXIEDust)

Tom J. L. C. Bakx, Hiddo S. B. Algera, Jean-Baptiste Jolly +25

Despite the implied presence of dust through reddened UV emission in high-redshift galaxies, no dust emission has been detected in the (sub)millimetre regime beyond . This…

astro-ph.GA2025★ 2 cited

The LMT 2 millimeter receiver system (B4R). II. Science demonstration observations toward Orion-KL/OMC-1

Teppei Yonetsu, Ryohei Kawabe, Yuki Yoshimura +26

We present the results of mapping and single-point spectral scans toward Orion-KL/OMC-1 performed as science demonstrations of a 2 mm SIS receiver, the Band 4 Receiver (B4R), insta…

astro-ph.IM2025

The LMT 2 Millimeter Receiver System (B4R). I. Overview and Results of Science Demonstration

Ryohei Kawabe, Takeshi Sakai, Kunihiko Tanaka +30

We report on the results of the on-sky test and science demonstration conducted with the 2 mm receiver system, B4R, on the 50 m Large Millimeter Telescope (LMT), located at an alti…

astro-ph.GA2025★ 14 cited

Large gas inflow driven by a matured galactic bar in the early Universe

Shuo Huang, Ryohei Kawabe, Hideki Umehata +3

Bar structures are present in about half of local disk galaxies and play pivotal roles in secular galaxy evolution. Bars impose a non-axisymmetric perturbation to the rotating disk…

astro-ph.GA2025

RIOJA. The dusty outflows and density-complex interstellar medium in the N-enhanced lensed galaxy RXCJ2248-ID at z=6.1

A. Crespo Gómez, Y. Tamura, L. Colina +19

We present an analysis on the kinematics and physical properties of the ionized gas in the lensed galaxy RXCJ2248-ID at z=6.1 based on high-resolution JWST NIRSpec/IFU data in comb…

astro-ph.GA2025

A warm ultra-luminous infrared galaxy just 600 million years after the Big Bang

T. J. L. C. Bakx, Laura Sommovigo, Yoichi Tamura +24

We present an Atacama Large Millimeter/submillimeter Array (ALMA) Band 9 continuum detection () of MACS0416_Y1 that confirms the suspected warm dust (91 K) of…

astro-ph.GA2025

RIOJA. Young Starburst and Ionized Gas Outflows in a Galaxy Uncovered by JWST NIRCam and NIRSpec Observations

Yi W. Ren, Akio K. Inoue, Javier Álvarez-Márquez +21

We present analysis of JWST NIRCam and NIRSpec observations of the galaxy SXDF-NB1006-2 at , as part of the Reionization and the ISM/Stellar Origins with JWST and ALMA (…

astro-ph.GA2025

ELPIS: Accelerated metal and dust enrichment in a proto-cluster core at

Hideki Umehata, Yoichi Tamura, Yoshinobu Fudamoto +17

We present a study of the metal, dust, and molecular gas content in galaxies within the A2744-z7p9OD proto-cluster at z ~ 7.88. We focus on two galaxy groups, the Quintet and the C…

astro-ph.GA2025

Early massive galaxy formation in the core of a galaxy protocluster 650 million years after the Big Bang

Yoshinobu Fudamoto, Yurina Nakazato, Daniel Ceverino +24

Rest-frame optical observations with the James Webb Space Telescope (JWST) have uncovered a population of massive galaxies, exceeding solar masses, present less than a bi…

astro-ph.GA2025

RIOJA. JWST and ALMA unveil the inhomogeneous and complex ISM structure in a star-forming galaxy at

Mitsutaka Usui, Ken Mawatari, Javier Álvarez-Márquez +21

We report the discovery of a complex, density-stratified interstellar medium (ISM) in the star-forming galaxy COS-2987 at , revealed by the unprecedented synergy between…

astro-ph.GA2025

RIOJA. A Clumpy Galaxy Assembly at Redshift 6.81 Revealed by JWST

Ken Mawatari, Luca Costantin, Mitsutaka Usui +21

Spatially resolved multi-wavelength analysis is essential to study galaxy formation and evolution. A UV-bright galaxy COS-2987030247 at is one of the Rosetta Stones in t…

astro-ph.GA2025★ 1 cited

Compact Ionized Gas Region Surrounded by Porous Neutral Gas in a Dusty Lyman Break Galaxy at Redshift

Masato Hagimoto, Yoichi Tamura, Akio K. Inoue +9

Porous interstellar medium (ISM) structure in galaxies at the epoch of reionization (EoR) gives us a hint to understand what types of galaxies contribute to reionization. Although…

astro-ph.GA2024★ 10 cited

JWST/NIRSpec spectroscopy of intermediate-mass quiescent galaxies at

Riku A. Sato, Akio K. Inoue, Yuichi Harikane +9

We present the analysis of three intermediate-mass quiescent galaxies (QGs) with stellar masses of at redshifts using NIRSpec low-resolutio…

astro-ph.GA2024★ 8 cited

Detection of the [O I] 63 m emission line from the quasar J2054-0005

Nozomi Ishii, Takuya Hashimoto, Carl Ferkinhoff +23

We report the highest-redshift detection of [O I] 63 m from a luminous quasar, J2054-0005, at based on the Atacama Large Millimeter/sub-millimeter Array Band 9 observat…

astro-ph.GA2024

Gas conditions of a star-formation selected sample in the first billion years

Tom J. L. C. Bakx, Hiddo S. B. Algera, Bram Venemans +20

We present Atacama Large Millimetre/submillimetre Array (ALMA) observations of the [O] 88 m emission of a sample of thirteen galaxies at = 6 to 7.6 selected as […

astro-ph.GA2024★ 7 cited

JWST, ALMA, and Keck Spectroscopic Constraints on the UV Luminosity Functions at z~7-14: Clumpiness and Compactness of the Brightest Galaxies in the Early Universe

Yuichi Harikane, Akio K. Inoue, Richard S. Ellis +33

We present the number densities and physical properties of the bright galaxies spectroscopically confirmed at . Our sample is composed of 60 galaxies at $z_\mathrm{spec}…

astro-ph.GA2024

A dusty proto-cluster surrounding the binary galaxy HerBS-70 at

Tom J. L. C. Bakx, S. Berta, H. Dannerbauer +38

We report on deep SCUBA-2 observations at 850m and NOEMA spectroscopic measurements at 2 mm of the environment surrounding the luminous, massive ($M_{*} \approx 2 \times 10^{11}…

astro-ph.GA2024★ 6 cited

Unveiling the Cosmic Gems Arc at with JWST NIRCam

Larry D. Bradley, Angela Adamo, Eros Vanzella +22

We present recent JWST NIRCam imaging observations of SPT0615-JD (also known as the Cosmic Gems Arc), lensed by the galaxy cluster SPT-CL J0615-5746. The 5 arcsec long arc is the m…

astro-ph.GA2024

RIOJA. Complex Dusty Starbursts in a Major Merger B14-65666 at z=7.15

Yuma Sugahara, Javier Álvarez-Márquez, Takuya Hashimoto +20

We present JWST NIRCam imaging of B14-65666 ("Big Three Dragons"), a bright Lyman-break galaxy system ( mag) at . The high angular resolution of NIRCam r…

astro-ph.GA2024★ 6 cited

Bound star clusters observed in a lensed galaxy 460 Myr after the Big Bang

Angela Adamo, Larry D. Bradley, Eros Vanzella +25

The Cosmic Gems arc is among the brightest and highly magnified galaxies observed at redshift . However, it is an intrinsically UV faint galaxy, in the range of those no…

astro-ph.GA2019★ 72 cited

The Absence of [CII] 158m Emission in Spectroscopically-Confirmed Galaxies at

N. Laporte, H. Katz, R. S. Ellis +8

The scatter in the relationship between the strength of [CII] 158m emission and the star formation rate at high-redshift has been the source of much recent interest. Although th…