A population of red candidate massive galaxies ~600 Myr after the Big Bang

作     者：Labbé, Ivo van Dokkum, Pieter Nelson, Erica Bezanson, Rachel Suess, Katherine A. Leja, Joel Brammer, Gabriel Whitaker, Katherine Mathews, Elijah Stefanon, Mauro Wang, Bingjie 

作者机构：Centre for Astrophysics and Supercomputing Swinburne University of Technology MelbourneVIC3122 Australia Department of Astronomy Yale University New HavenCT06511 United States Department for Astrophysical and Planetary Science University of Colorado BoulderCO80309 United States Department of Physics and Astronomy PITT PACC University of Pittsburgh PittsburghPA15260 United States Department of Astronomy and Astrophysics University of California Santa Cruz 1156 High Street Santa CruzCA95064 United States Kavli Institute for Particle Astrophysics and Cosmology Department of Physics Stanford University StanfordCA94305 United States Department of Astronomy & Astrophysics The Pennsylvania State University University ParkPA16802 United States Institute for Computational & Data Sciences The Pennsylvania State University University ParkPA United States Institute for Gravitation and the Cosmos The Pennsylvania State University University ParkPA16802 United States  Niels Bohr Institute University of Copenhagen Jagtvej 128 København NDK-2200 Denmark Department of Astronomy University of Massachusetts AmherstMA01003 United States Departament d’Astronomia i Astrofisica Universitat de Valencia C. Dr. Moliner 50 Burjassot ValenciaE-46100 Spain  Spain 

出 版 物：《arXiv》 (arXiv)

年 卷 期：2022年

核心收录：

主　　题：Galaxies 

摘      要：Galaxies with stellar masses as high as ~ 1011 solar masses have been identified1–3 out to redshifts z ~ 6, approximately one billion years after the Big Bang. It has been difficult to find massive galaxies at even earlier times, as the Balmer break region, which is needed for accurate mass estimates, is redshifted to wavelengths beyond 2.5 μm. Here we make use of the 1-5 μm coverage of the JWST early release observations to search for intrinsically red galaxies in the first ≈ 750 million years of cosmic history. In the survey area, we find six candidate massive galaxies (stellar mass 1010 solar masses) at 7.4 ≤ z ≤ 9.1, 500–700 Myr after the Big Bang, including one galaxy with a possible stellar mass of ~1011 solar masses. If verified with spectroscopy, the stellar mass density in massive galaxies would be much higher than anticipated from previous studies based on rest-frame ultraviolet-selected samples. Copyright © 2022, The Authors. All rights reserved.