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Two-temperature Radiative Hot Accretion Flow around Neutron Stars

文献类型：期刊论文

作者Bu, De-Fu1; Qiao, Erlin2,3; Yang, Xiao-Hong4
刊名ASTROPHYSICAL JOURNAL
出版日期2020-02-20
卷号890期号:2页码:11
ISSN号0004-637X
DOI10.3847/1538-4357/ab6d02
英文摘要Numerical simulations of radiative two-temperature hot accretion flows (HAFs) around Neutron stars (NSs) are performed. We assume that all of the energy carried by the HAF around a NS will be thermalized and radiated out at the surface of the NS. The thermal photons will propagate outwards radially and cool the HAF via Comptonization. We define m. as the mass accretion rate at the surface of the central object in unit of Eddington accretion rate (M-Edd = 10L(Edd)/c(2), with L-Edd and c being Eddington luminosity and speed of light, respectively). When m(over dot) is lower than similar to 10(-4), the cooling of the HAF is not important and outflows are very strong. When (m) over dot > similar to 10(-3), cooling becomes important and outflows are significantly weak. In the range 10(-4) < (m) over dot < 10(-3), the HAFs transients from a strong outflow phase to a very weak outflow phase with increase of m(over dot). The properties of the HAF around a NS are also compared with those of the HAF around a BH. We find that with a similar m(over dot), the dynamical properties of the HAF around a NS are quite similar as those of the HAF around a BH. However, the emitted spectrum of a HAF around a NS can be quite different from that of a HAF around a BH due to the presence of a thermal soft X-ray component coming from the surface of the NS.
WOS关键词ADVECTION-DOMINATED ACCRETION ; X-RAY-SPECTRA ; BLACK-HOLE ; HYSTERESIS ; XTE-J1550-564 ; SIMULATIONS ; TRANSITIONS ; PULSATIONS ; TRANSIENTS ; EMISSION
资助项目Natural Science Foundation of China[11773053] ; Natural Science Foundation of China[11573051] ; Natural Science Foundation of China[11633006] ; Natural Science Foundation of China[11661161012] ; Natural Science Foundation of China[11773037] ; Natural Science Foundation of China[11973018] ; Key Research Program of Frontier Sciences of CAS[QYZDJSSW-SYS008] ; Strategic Pioneer Program on Space Science, Chinese Academy of Sciences[XDA15052100] ; gravitational wave pilot B[XDB23040100] ; National Program on Key Research and Development Project[2016YFA0400804] ; Natural Science Foundation Project of CQ CSTC[cstc2019jcyj-msxmX0581]
WOS研究方向Astronomy & Astrophysics
语种英语
WOS记录号WOS:000522100700025
出版者IOP PUBLISHING LTD
资助机构Natural Science Foundation of China ; Natural Science Foundation of China ; Key Research Program of Frontier Sciences of CAS ; Key Research Program of Frontier Sciences of CAS ; Strategic Pioneer Program on Space Science, Chinese Academy of Sciences ; Strategic Pioneer Program on Space Science, Chinese Academy of Sciences ; gravitational wave pilot B ; gravitational wave pilot B ; National Program on Key Research and Development Project ; National Program on Key Research and Development Project ; Natural Science Foundation Project of CQ CSTC ; Natural Science Foundation Project of CQ CSTC ; Natural Science Foundation of China ; Natural Science Foundation of China ; Key Research Program of Frontier Sciences of CAS ; Key Research Program of Frontier Sciences of CAS ; Strategic Pioneer Program on Space Science, Chinese Academy of Sciences ; Strategic Pioneer Program on Space Science, Chinese Academy of Sciences ; gravitational wave pilot B ; gravitational wave pilot B ; National Program on Key Research and Development Project ; National Program on Key Research and Development Project ; Natural Science Foundation Project of CQ CSTC ; Natural Science Foundation Project of CQ CSTC ; Natural Science Foundation of China ; Natural Science Foundation of China ; Key Research Program of Frontier Sciences of CAS ; Key Research Program of Frontier Sciences of CAS ; Strategic Pioneer Program on Space Science, Chinese Academy of Sciences ; Strategic Pioneer Program on Space Science, Chinese Academy of Sciences ; gravitational wave pilot B ; gravitational wave pilot B ; National Program on Key Research and Development Project ; National Program on Key Research and Development Project ; Natural Science Foundation Project of CQ CSTC ; Natural Science Foundation Project of CQ CSTC ; Natural Science Foundation of China ; Natural Science Foundation of China ; Key Research Program of Frontier Sciences of CAS ; Key Research Program of Frontier Sciences of CAS ; Strategic Pioneer Program on Space Science, Chinese Academy of Sciences ; Strategic Pioneer Program on Space Science, Chinese Academy of Sciences ; gravitational wave pilot B ; gravitational wave pilot B ; National Program on Key Research and Development Project ; National Program on Key Research and Development Project ; Natural Science Foundation Project of CQ CSTC ; Natural Science Foundation Project of CQ CSTC
源URL[http://ir.bao.ac.cn/handle/114a11/55709]  
专题中国科学院国家天文台
通讯作者Bu, De-Fu
作者单位1.Chinese Acad Sci, Shanghai Astron Observ, Key Lab Res Galaxies & Cosmol, 80 Nandan Rd, Shanghai 200030, Peoples R China
2.Chinese Acad Sci, Natl Astron Observ, Key Lab Space Astron & Technol, Beijing 100012, Peoples R China
3.Univ Chinese Acad Sci, Sch Astron & Space Sci, 19A Yuquan Rd, Beijing 100049, Peoples R China
4.Chongqing Univ, Dept Phys, Chongqing 400044, Peoples R China
推荐引用方式
GB/T 7714		 Bu, De-Fu,Qiao, Erlin,Yang, Xiao-Hong. Two-temperature Radiative Hot Accretion Flow around Neutron Stars[J]. ASTROPHYSICAL JOURNAL,2020,890(2):11.
APA Bu, De-Fu,Qiao, Erlin,&Yang, Xiao-Hong.(2020).Two-temperature Radiative Hot Accretion Flow around Neutron Stars.ASTROPHYSICAL JOURNAL,890(2),11.
MLA Bu, De-Fu,et al."Two-temperature Radiative Hot Accretion Flow around Neutron Stars".ASTROPHYSICAL JOURNAL 890.2(2020):11.

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