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Insight-HXMT observations of Swift J0243.6+6124: the evolution of RMS pulse fractions at super-Eddington luminosity

文献类型：期刊论文

作者HXMT
刊名Monthly Notices of the Royal Astronomical Society
出版日期2020
卷号497页码:5498-5506
关键词stars: neutron pulsars: individual: Swift J0243.6+6124 X-rays: binaries Astrophysics - High Energy Astrophysical Phenomena Abstract: Based on Insight-HXMT data, we report on the pulse fraction evolution during the 2017-2018 outburst of the newly discovered first Galactic ultraluminous X-ray (ULX) source Swift J0243.6+6124. The pulse fractions of 19 observation pairs selected in the rising and fading phases with similar luminosity are investigated. The results show a general trend of the pulse fraction increasing with luminosity and energy at supercritical luminosity. However, the relative strength of the pulsation between each pair evolves strongly with luminosity. The pulse fraction in the rising phase is larger at luminosity below 7.71 × 1038 erg s-1, but smaller at above. A transition luminosity is found to be energy independent. Such a phenomenon is first confirmed by Insight-HXMT observations and we speculate that it may have relation with the radiation-pressure-dominated accretion disc.
ISSN号0035-8711
DOI10.1093/mnras/staa2448
文献子类Journal Article
语种英语
源URL[http://ir.ihep.ac.cn/handle/311005/291327]  
专题硬X射线调制望远镜卫星
推荐引用方式
GB/T 7714		 HXMT. Insight-HXMT observations of Swift J0243.6+6124: the evolution of RMS pulse fractions at super-Eddington luminosity[J]. Monthly Notices of the Royal Astronomical Society,2020,497:5498-5506.
APA HXMT.(2020).Insight-HXMT observations of Swift J0243.6+6124: the evolution of RMS pulse fractions at super-Eddington luminosity.Monthly Notices of the Royal Astronomical Society,497,5498-5506.
MLA HXMT."Insight-HXMT observations of Swift J0243.6+6124: the evolution of RMS pulse fractions at super-Eddington luminosity".Monthly Notices of the Royal Astronomical Society 497(2020):5498-5506.

入库方式： OAI收割

来源：高能物理研究所

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