XRISM Constraints on Unidentified X-Ray Emission Lines, Including the 3.5 keV Line, in the Stacked Spectrum of 10 Galaxy Clusters

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216224%3A14310%2F25%3A00144661" target="_blank" >RIV/00216224:14310/25:00144661 - isvavai.cz</a>

Result on the web

<a href="https://iopscience.iop.org/article/10.3847/2041-8213/ae17ad" target="_blank" >https://iopscience.iop.org/article/10.3847/2041-8213/ae17ad</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.3847/2041-8213/ae17ad" target="_blank" >10.3847/2041-8213/ae17ad</a>

Result language

angličtina

Original language name

XRISM Constraints on Unidentified X-Ray Emission Lines, Including the 3.5 keV Line, in the Stacked Spectrum of 10 Galaxy Clusters

Original language description

The American Astronomical Society, find out more. The following article isOpen access XRISM Constraints on Unidentified X-Ray Emission Lines, Including the 3.5 keV Line, in the Stacked Spectrum of 10 Galaxy Clusters XRISM Collaboration, Marc Audard, Hisamitsu Awaki, Ralf Ballhausen, Aya Bamba, Ehud Behar, Rozenn Boissay-Malaquin, Laura Brenneman, Gregory V. Brown, Lia CorralesShow full author list Published 2025 November 18 • © 2025. The Author(s). Published by the American Astronomical Society. The Astrophysical Journal Letters, Volume 994, Number 1 Citation XRISM Collaboration et al 2025 ApJL 994 L28 DOI 10.3847/2041-8213/ae17ad DownloadArticle PDFDownloadArticle ePub Authors Figures Tables References Download PDFDownload ePub Article metrics 964 Total downloads Share this article Hide article information Dates Received 2025 September 30 Revised 2025 October 23 Accepted 2025 October 25 Published 2025 November 18 Check for updates using Crossmark Unified Astronomy Thesaurus concepts Galaxy clusters; Intracluster medium; Dark matter; Warm dark matter; X-ray astronomy; X-ray sources Journal RSS Create or edit your corridor alerts What are corridors? Abstract We stack 3.75 Ms of early XRISM Resolve observations of 10 galaxy clusters to search for unidentified spectral lines in the E = 2.5-15 keV band (rest frame), including the E = 3.5 keV line reported in earlier low spectral resolution studies of cluster samples. Such an emission line may originate from the decay of the sterile neutrino, a warm dark matter (DM) candidate. No unidentified lines are detected in our stacked cluster spectrum, with the 3σ upper limit on the ms ∼ 7.1 keV DM particle decay rate (which corresponds to an E = 3.55 keV emission line) of Γ ∼ 1.0 x 10-27 s-1. This upper limit is 3-4 times lower than the one derived by Hitomi Collaboration from the Perseus observation but still 5 times higher than the XMM-Newton detection reported by E. Bulbul et al. in the stacked cluster sample. XRISM Resolve, with its high spectral resolution but small field of view, may reach the sensitivity needed to test the XMM-Newton cluster sample detection by combining several years worth of future cluster observations.

Czech name

—

Czech description

—

Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

—

OECD FORD branch

10308 - Astronomy (including astrophysics,space science)

Project

<a href="/en/project/GX21-13491X" target="_blank" >GX21-13491X: Exploring the Hot Universe and Understanding Cosmic Feedback</a><br>

Continuities

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year

2025

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

ASTROPHYSICAL JOURNAL LETTERS

ISSN

2041-8205

e-ISSN

2041-8213

Volume of the periodical

994

Issue of the periodical within the volume

1

Country of publishing house

GB - UNITED KINGDOM

Number of pages

14

Pages from-to

1-14

UT code for WoS article

001617601900001

EID of the result in the Scopus database

2-s2.0-105034226853