activity
20232026
most citedReionization and the ISM/Stellar Origins with JWST and ALMA (RIOJA): The core of the highest redshift galaxy overdensity at confirmed by NIRSpec/JWST

48 citations · 67 across the 12 of their papers we have counts for

collaborators

12 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

PRISMS. UNCOVER-26185, a metal-poor SFG at z=10.05 with no evidence for a X-ray-luminous AGN

J. Álvarez-Márquez, L. Colina, A. Crespo-Gomez +31

This work presents the first results of the PRImordial galaxy Survey with MIRI Spectroscopy (PRISMS), a JWST cycle 4 program (PID 8051) aimed at the characterization of a relativel…

astro-ph.GA2026★ 1 cited

PRISMS. U37126, a very blue, ISM-naked starburst at z=10.255 with nearly 100% Lyman continuum escape fraction

R. Marques-Chaves, J. Álvarez-Márquez, L. Colina +31

We present very deep (~11h) JWST/MIRI low-resolution spectroscopy of the rest-frame optical emission of U37126, a UV-bright (M_UV ~ -20), mildly lensed () galaxy at z=…

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

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★ 1 cited

Extremely UV-bright starbursts at the end of cosmic reionization

R. Marques-Chaves, D. Schaerer, M. Dessauges-Zavadsky +22

We present a study of 27 very UV-bright (-22.0<MUV<-24.4) sources at z~6 identified in SHELLQs survey. Stacking their rest-frame UV spectra reveals a prominent NV1240A P-Cygni, con…

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.GA2024★ 17 cited

Galaxy merger challenge: A comparison study between machine learning-based detection methods

B. Margalef-Bentabol, L. Wang, A. La Marca +14

Various galaxy merger detection methods have been applied to diverse datasets. However, it is difficult to understand how they compare. We aim to benchmark the relative performance…

astro-ph.GA2024

JWST MIRI detections of H and [O III] and direct metallicity measurement of the lensed galaxy MACS0647JD

Tiger Yu-Yang Hsiao, Javier Álvarez-Márquez, Dan Coe +30

JWST spectroscopy has revolutionized our understanding of galaxies in the early universe. Covering wavelengths up to , NIRSpec can detect rest-frame optical emission…

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.GA2023★ 48 cited

Reionization and the ISM/Stellar Origins with JWST and ALMA (RIOJA): The core of the highest redshift galaxy overdensity at confirmed by NIRSpec/JWST

Takuya Hashimoto, Javier Álvarez-Márquez, Yoshinobu Fudamoto +20

The protoclusters in the epoch of reionization, traced by galaxies overdensity regions, are ideal laboratories for studying the process of stellar assembly and cosmic reionization.…