Y. Isobe

activity

20192026

most citedA Comprehensive Study on Galaxies at z~9-16 Found in the Early JWST Data: UV Luminosity Functions and Cosmic Star-Formation History at the Pre-Reionization Epoch

533 citations · 1.5k across the 46 of their papers we have counts for

collaborators

Showing 2025Show all

2 papers · 1 filter

astro-ph.GA2025

EMPRESS. XV. A New Determination of the Primordial Helium Abundance Suggesting a Moderately Low $Y_{P}$ Value

Hiroto Yanagisawa, Masami Ouchi, Akinori Matsumoto +18

We present a new constraint on the primordial helium abundance, $Y_{P}$ , based on Subaru observations. A major source of uncertainty in previous $Y_{P}$ determination…

astro-ph.GA2025★ 1 cited

Fe Abundances of Early Galaxies at $z = 9 - 12$ Derived with Deep JWST Spectra

Minami Nakane, Masami Ouchi, Kimihiko Nakajima +12

We derive Fe-abundance ratios of 7 galaxies at $z = 9 - 12$ with $- 22 < M_{UV} < - 19$ whose JWST/NIRSpec spectra achieve very high signal-to-noise ratios, $SNR = 60 - 320$ , a…

EMPRESS. XV. A New Determination of the Primordial Helium Abundance Suggesting a Moderately Low YP​ Value

Fe Abundances of Early Galaxies at z=9−12 Derived with Deep JWST Spectra

EMPRESS. XV. A New Determination of the Primordial Helium Abundance Suggesting a Moderately Low $Y_{P}$ Value

Fe Abundances of Early Galaxies at $z = 9 - 12$ Derived with Deep JWST Spectra