IHEP OpenIR  > 硬X射线调制望远镜卫星
Discovery of oscillations above 200 keV in a black hole X-ray binary with Insight-HXMT
Xiang Ma;  Lian Tao;  Shuang-Nan Zhang;  Liang Zhang;  Qing-Cui Bu;  Ming-Yu Ge;  Yu-Peng Chen;  Jin-Lu Qu;  Shu Zhang;  Fang-Jun Lu;  Li-Ming Song;  Yi-Jung Yang;  Feng Yuan;  Ce Cai;  Xue-Lei Cao;  Zhi Chang;  Gang Chen;  Li Chen;  Tian-Xiang Chen;  Yi-Bao Chen;  Yong Chen;  Wei Cui;  Wei-Wei Cui
2020-09-21
Source PublicationNature Astronomy
Abstract

Low-frequency quasiperiodic oscillations (LFQPOs) are commonly found in black hole X-ray binaries, and their origin is still under debate. The properties of LFQPOs at high energies (above 30 keV) are closely related to the nature of the accretion flow in the innermost regions, and thus play a crucial role in critically testing various theoretical models. The Hard X-ray Modulation Telescope is capable of detecting emissions above 30 keV, and is therefore an ideal instrument to do so. Here we report the discovery of LFQPOs above 200 keV in the new black hole MAXI J1820+070 in the X-ray hard state, which allows us to understand the behaviours of LFQPOs at hundreds of kiloelectronvolts. The phase lag of the LFQPO is constant around zero below 30 keV, and becomes a soft lag (that is, the high-energy photons arrive first) above 30 keV. The soft lag gradually increases with energy and reaches ~0.9 s in the 150–200 keV band. The detection at energies above 200 keV, the large soft lag and the energy-related behaviours of the LFQPO pose a great challenge for most existing models, but suggest that the LFQPO probably originates from the precession of a small-scale jet.

Indexed ByINSPIREHEP
Language英语
inspireid1818535
inspireURLhttps://inspirehep.net/literature/1818535
Citation statistics
Cited Times:3 [INSPIRE]
Document Type期刊论文
Identifierhttp://ir.ihep.ac.cn/handle/311005/287821
Collection硬X射线调制望远镜卫星
Affiliation中国科学院高能物理研究所
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GB/T 7714
Xiang Ma;Lian Tao;Shuang-Nan Zhang;Liang Zhang;Qing-Cui Bu;Ming-Yu Ge;Yu-Peng Chen;Jin-Lu Qu;Shu Zhang;Fang-Jun Lu;Li-Ming Song;Yi-Jung Yang;Feng Yuan;Ce Cai;Xue-Lei Cao;Zhi Chang;Gang Chen;Li Chen;Tian-Xiang Chen;Yi-Bao Chen;Yong Chen;Wei Cui;Wei-Wei Cui;. Discovery of oscillations above 200 keV in a black hole X-ray binary with Insight-HXMT[J]. Nature Astronomy,2020.
APA Xiang Ma;Lian Tao;Shuang-Nan Zhang;Liang Zhang;Qing-Cui Bu;Ming-Yu Ge;Yu-Peng Chen;Jin-Lu Qu;Shu Zhang;Fang-Jun Lu;Li-Ming Song;Yi-Jung Yang;Feng Yuan;Ce Cai;Xue-Lei Cao;Zhi Chang;Gang Chen;Li Chen;Tian-Xiang Chen;Yi-Bao Chen;Yong Chen;Wei Cui;Wei-Wei Cui;.(2020).Discovery of oscillations above 200 keV in a black hole X-ray binary with Insight-HXMT.Nature Astronomy.
MLA Xiang Ma;Lian Tao;Shuang-Nan Zhang;Liang Zhang;Qing-Cui Bu;Ming-Yu Ge;Yu-Peng Chen;Jin-Lu Qu;Shu Zhang;Fang-Jun Lu;Li-Ming Song;Yi-Jung Yang;Feng Yuan;Ce Cai;Xue-Lei Cao;Zhi Chang;Gang Chen;Li Chen;Tian-Xiang Chen;Yi-Bao Chen;Yong Chen;Wei Cui;Wei-Wei Cui;."Discovery of oscillations above 200 keV in a black hole X-ray binary with Insight-HXMT".Nature Astronomy (2020).
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