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A Gamma-Ray Periodic Modulation in Globular Cluster 47 Tucanae
Zhang, Peng-Fei1,2; Zhou, Jia-Neng3; Yan DH(闫大海)4,5,6; Yan, Jing-Zhi2,7; Fan, Yi-Zhong2,7; Fang, Jun1; Zhang, Li1
Source PublicationASTROPHYSICAL JOURNAL LETTERS
2020-12-01
Volume904Issue:2Pages:5
DOI10.3847/2041-8213/abc7bb
Contribution Rank第4完成单位
Indexed BySCI
KeywordGlobular star clusters Gamma-rays Binary pulsars Periodic orbit
Abstract

The globular cluster 47 Tucanae was first detected in gamma rays by the Large Area Telescope (LAT) on board the Fermi Gamma-ray Space Telescope, and the gamma-ray emission has been widely attributed to the millisecond pulsars. In this work, we analyze the Fermi-LAT pass 8 data ranging from 2008 August to 2017 May and report the detection of a modulation with a period of 18.416 0.008 hr at a significance level of similar to 4.8 sigma. This is the first time detecting a significant modulation with a period much longer than that of millisecond pulsars in gamma rays from globular clusters. The periodic modulation signal appears in the Swift Burst Alert Telescope (BAT) data as well. The phase-folded Chandra X-ray light curve of a point source may have provided an additional clue.

Funding ProjectNational Key R&D Program of China[2018YFA0404204] ; National Natural Science Foundation of China[11603059] ; National Natural Science Foundation of China[11661161010] ; National Natural Science Foundation of China[U1738124] ; National Natural Science Foundation of China[E085051002] ; joint foundation of Department of Science and Technology of Yunnan Province and Yunnan University[2018FY001 (-003)] ; Candidate Talents Training Fund of Yunnan Province[2017HB003] ; CAS Youth Innovation Promotion Association
Funding OrganizationNational Key R&D Program of China[2018YFA0404204] ; National Natural Science Foundation of China[11603059, 11661161010, U1738124, E085051002] ; joint foundation of Department of Science and Technology of Yunnan Province and Yunnan University[2018FY001 (-003)] ; Candidate Talents Training Fund of Yunnan Province[2017HB003] ; CAS Youth Innovation Promotion Association
Language英语
Subject Area天文学 ; 天体物理学 ; 高能天体物理学
MOST Discipline Catalogue理学::天文学
SubtypeArticle
PublisherIOP PUBLISHING LTD
Publication PlaceTEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
ISSN2041-8205
URL查看原文
WOS IDWOS:000595249900001
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS KeywordLARGE-AREA TELESCOPE ; GLOBULAR-CLUSTER-47 TUCANAE ; EMISSION ; CATALOG ; PULSAR ; BINARIES ; BAT
Citation statistics
Document Type期刊论文
Identifierhttp://ir.ynao.ac.cn/handle/114a53/23957
Collection高能天体物理研究组
中国科学院天体结构与演化重点实验室
Corresponding AuthorZhang, Peng-Fei
Affiliation1.Department of Astronomy, School of Physics and Astronomy, Key Laboratory of Astroparticle Physics of Yunnan Province, Yunnan University, Kunming 650091, People's Republic of China
2.Key Laboratory of Dark Matter and Space Astronomy, Purple Mountain Observatory, Chinese Academy of Sciences, Nanjing 210034, People's Republic of China
3.Shanghai Astronomical Observatory, Chinese Academy of Sciences, 80 Nandan Road, Shanghai 200030, People's Republic of China
4.Key Laboratory for the Structure and Evolution of Celestial Objects, Yunnan Observatory, Chinese Academy of Sciences, Kunming 650011, People's Republic of China
5.Center for Astronomical Mega-Science, Chinese Academy of Sciences, 20A Datun Road, Chaoyang District, Beijing 100012, People's Republic of China
6.Key Laboratory for the Structure and Evolution of Celestial Objects, Chinese Academy of Sciences, Kunming 650011, People's Republic of China
7.School of Astronomy and Space Science, University of Science and Technology of China, Hefei, Anhui 230026, People's Republic of China
Recommended Citation
GB/T 7714
Zhang, Peng-Fei,Zhou, Jia-Neng,Yan DH,et al. A Gamma-Ray Periodic Modulation in Globular Cluster 47 Tucanae[J]. ASTROPHYSICAL JOURNAL LETTERS,2020,904(2):5.
APA Zhang, Peng-Fei.,Zhou, Jia-Neng.,Yan DH.,Yan, Jing-Zhi.,Fan, Yi-Zhong.,...&Zhang, Li.(2020).A Gamma-Ray Periodic Modulation in Globular Cluster 47 Tucanae.ASTROPHYSICAL JOURNAL LETTERS,904(2),5.
MLA Zhang, Peng-Fei,et al."A Gamma-Ray Periodic Modulation in Globular Cluster 47 Tucanae".ASTROPHYSICAL JOURNAL LETTERS 904.2(2020):5.
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