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X-Ray Emission Evolution of the Galactic Ultraluminous X-Ray Pulsar Swift J0243.6+6124 during the 2017–2018 Outburst Observed by the MAXI GSC
Sugizaki,Mutsumi1,2; Oeda,Motoki1; Kawai,Nobuyuki1; Mihara,Tatehiro3; Makishima,Kazuo3,4; Nakajima,Motoki5
2020-06-01
Source PublicationThe Astrophysical Journal
ISSN0004-637X
Volume896Issue:2
AbstractAbstract This paper reports on the X-ray emission evolution of the ultraluminous Galactic X-ray pulsar Swift J0243.6+6124 during the giant outburst from 2017 October to 2018 January as observed by the MAXI GSC all-sky survey. The 2–30 keV light curve and the energy spectra confirm the source luminosity LX assuming an isotropic emission reached 2.5?×?1039 erg s?1, 10 times higher than the Eddington limit for a 1.4 M⊙ neutron star. When the source was luminous with LX???0. 9?×?1038 erg s?1, it generally exhibited a negative correlation on a hardness-intensity diagram. However, two hardness ratios, a soft color (=4–10 keV/2–4 keV) and a hard color (=10–20 keV/4–10 keV), showed somewhat different behavior across a characteristic luminosity of Lc???5?×?1038 erg s?1. The soft color changed more than the hard color when LX?
KeywordNeutron stars Binary pulsars Accretion High mass x-ray binary stars
DOI10.3847/1538-4357/ab93c7
Language英语
WOS IDIOP:0004-637X-896-2-ab93c7
PublisherThe American Astronomical Society
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Document Type期刊论文
Identifierhttp://ir.bao.ac.cn/handle/114a11/63591
Collection中国科学院国家天文台
Affiliation1.Department of Physics, Tokyo Institute of Technology, 2-12-1 Ookayama, Meguro-ku, Tokyo 152-8551, Japan; mutsumi@nao.cas.cn
2.National Astronomical Observatories, Chinese Academy of Sciences, 20A Datun Road, Beijing 100012, People's Republic of China
3.High Energy Astrophysics Laboratory, RIKEN, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
4.Kavli IPMU, The University of Tokyo, 5-1-5 Kashiwanoha, Kashiwa, Chiba 277-8583, Japan
5.School of Dentistry at Matsudo, Nihon University, 2-870-1 Sakaecho-nishi, Matsudo, Chiba 101-8308, Japan
First Author AffilicationNational Astronomical Observatories, Chinese Academy of Sciences
Recommended Citation
GB/T 7714
Sugizaki,Mutsumi,Oeda,Motoki,Kawai,Nobuyuki,等. X-Ray Emission Evolution of the Galactic Ultraluminous X-Ray Pulsar Swift J0243.6+6124 during the 2017–2018 Outburst Observed by the MAXI GSC[J]. The Astrophysical Journal,2020,896(2).
APA Sugizaki,Mutsumi,Oeda,Motoki,Kawai,Nobuyuki,Mihara,Tatehiro,Makishima,Kazuo,&Nakajima,Motoki.(2020).X-Ray Emission Evolution of the Galactic Ultraluminous X-Ray Pulsar Swift J0243.6+6124 during the 2017–2018 Outburst Observed by the MAXI GSC.The Astrophysical Journal,896(2).
MLA Sugizaki,Mutsumi,et al."X-Ray Emission Evolution of the Galactic Ultraluminous X-Ray Pulsar Swift J0243.6+6124 during the 2017–2018 Outburst Observed by the MAXI GSC".The Astrophysical Journal 896.2(2020).
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