Implications of the Stellar Mass Density of High-z Massive Galaxies from JWST on Warm Dark Matter

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外文摘要：A significant excess of the stellar mass density at high redshift has been discovered from the early data release of James Webb Space Telescope(JWST),and it may require a high star formation efficiency.However,this will lead to large number density of ionizing photons in the epoch of reionization(EoR),so that the reionization history will be changed,which can arise tension with the current EoR observations.Warm dark matter(WDM),via the free streaming effect,can suppress the formation of small-scale structure as well as low-mass galaxies.This provides an effective way to decrease the ionizing photons when considering a large star formation efficiency in high-z massive galaxies without altering the cosmic reionization history.On the other hand,the constraints on the properties of WDM can be derived from the JWST observations.In this work,we study WDM as a possible solution to reconcile the JWST stellar mass density of high-z massive galaxies and reionization history.We find that,the JWST high-z comoving cumulative stellar mass density alone has no significant preference for either CDM or WDM model.But using the observational data of other stellar mass density measurements and reionization history,we obtain that the WDM particle mass with mW=0.51+0.22-0.12 keV and star formation efficiency parameter f0*＞0.39 in 2σ confidence level can match both the JWST high-z comoving cumulative stellar mass density and the reionization history.

外文关键词：

Cosmology(cosmology:)dark matter(cosmology:)large-scale structure of universe

作者：

Hengjie Lin、Yan Gong、Bin Yue、Xuelei Chen

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作者单位：

National Astronomical Observatories,Chinese Academy of Sciences,Beijing 100101,China

University of Chinese Academy of Sciences,Beijing 100049,China

Science Center for China Space Station Telescope,National Astronomical Observatories,Chinese Academy of Sciences,Beijing 100101,China

Department of Physics,College of Sciences,Northeastern University,Shenyang 110819,China

Center for High Energy Physics,Peking University,Beijing 100871,China

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基金：

国家重点研发计划国家重点研发计划国家重点研发计划国家重点研发计划国家重点研发计划国家重点研发计划国家重点研发计划CAS Project for Young Scientists in Basic Research中国科学院项目中国科学院项目中国科学院项目science research grants from the China Manned Space Projectscience research grants from the China Manned Space Project

项目编号：

2022YFF05034042020SKA0110402MOST-2018YFE0120800NSFC-11822305NSFC-11773031NSFC-11633004NSFC-114YSBR-092QYZDJ-SSW-SLH017XDB 23040100XDA15020200CMS-CSST-2021-B01CMS-CSST-2021-A01

出版年：

2024

DOI：

10.1088/1674-4527/ad0864

天文和天体物理学研究

中国科学院国家天文台

天文和天体物理学研究

CSTPCD

影响因子：0.406

ISSN：1674-4527

年,卷(期)：2024.24(1)

参考文献量85