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The Energetic Thermonuclear Bursts in SAX J1712.6-3739
Lin, Jie1,2,3,4; Yu, Wenfei3,4
2020-11-01
Source PublicationASTROPHYSICAL JOURNAL
ISSN0004-637X
Volume903Issue:1Pages:11
AbstractThe neutron star low-mass X-ray binary SAX J1712.6-3739 is known for its long and hard thermonuclear X-ray bursts from previous observations. Its thermonuclear bursts are so distinct as they can last for tens of minutes, as seen with Swift/BAT (E > 15 keV). To explore the origin of these extreme bursts and the nature of SAX J1712.6-3739, we analyzed the observations of all four bursts that were captured by Swift/BAT and derived the peak flux and the fluence of these bursts from joint studies with Swift/XRT and Swift/BAT. The derived bolometric peak fluxes observed by Swift set the distance of SAX J1712.6-3739 to be 4.6-5.6 kpc, while the derived absolute magnitude and average accretion rate agree with its ultracompact nature. Our measurements of the effective duration of these bursts conclude that the 2010 burst corresponds to a normal X-ray burst, the 2011 burst is consistent with an intermediate-duration burst, while the 2014 and the 2018 bursts are more energetic than common intermediate-duration bursts but less energetic than those known superbursts. We estimated that the average mass accretion rate of SAX J1712.6-3739 was about only 0.4%-0.7% (M) ovet dot(Edd). Current theory predicts no carbon production in the bursters under such low accretion rate. If true, the 2014 and 2018 bursts are then deep helium bursts instead of carbon bursts. The thermonuclear bursts of SAX J1712.6-3739 have shown a very wide range of durations. The ignition model predicts that the diverse burst durations are induced by variable accretion rates, but current results provide only weak support to this inference.
Funding OrganizationNational Program on Key Research and Development Project ; National Program on Key Research and Development Project ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; FAST fellowship ; FAST fellowship ; National Program on Key Research and Development Project ; National Program on Key Research and Development Project ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; FAST fellowship ; FAST fellowship ; National Program on Key Research and Development Project ; National Program on Key Research and Development Project ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; FAST fellowship ; FAST fellowship ; National Program on Key Research and Development Project ; National Program on Key Research and Development Project ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; FAST fellowship ; FAST fellowship
DOI10.3847/1538-4357/abb76f
WOS KeywordX-RAY-BURSTS ; NEUTRON-STARS ; MASS ; RADIUS
Language英语
Funding ProjectNational Program on Key Research and Development Project[2016YFA0400804] ; National Natural Science Foundation of China[U1838203] ; National Natural Science Foundation of China[11333005] ; FAST fellowship
Funding OrganizationNational Program on Key Research and Development Project ; National Program on Key Research and Development Project ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; FAST fellowship ; FAST fellowship ; National Program on Key Research and Development Project ; National Program on Key Research and Development Project ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; FAST fellowship ; FAST fellowship ; National Program on Key Research and Development Project ; National Program on Key Research and Development Project ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; FAST fellowship ; FAST fellowship ; National Program on Key Research and Development Project ; National Program on Key Research and Development Project ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; FAST fellowship ; FAST fellowship
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS IDWOS:000584920900001
PublisherIOP PUBLISHING LTD
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Document Type期刊论文
Identifierhttp://ir.bao.ac.cn/handle/114a11/80656
Collection中国科学院国家天文台
Corresponding AuthorLin, Jie
Affiliation1.Tsinghua Univ, Phys Dept, Beijing 100084, Peoples R China
2.Tsinghua Univ, Tsinghua Ctr Astrophys THCA, Beijing 100084, Peoples R China
3.Chinese Acad Sci, Shanghai Astron Observ, 80 Nandan Rd, Shanghai 200030, Peoples R China
4.Chinese Acad Sci, Key Lab Res Galaxies & Cosmol, 80 Nandan Rd, Shanghai 200030, Peoples R China
Recommended Citation
GB/T 7714
Lin, Jie,Yu, Wenfei. The Energetic Thermonuclear Bursts in SAX J1712.6-3739[J]. ASTROPHYSICAL JOURNAL,2020,903(1):11.
APA Lin, Jie,&Yu, Wenfei.(2020).The Energetic Thermonuclear Bursts in SAX J1712.6-3739.ASTROPHYSICAL JOURNAL,903(1),11.
MLA Lin, Jie,et al."The Energetic Thermonuclear Bursts in SAX J1712.6-3739".ASTROPHYSICAL JOURNAL 903.1(2020):11.
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