Calvera: A Low-mass Strangeon Star Torqued by Debris Disk?
文献类型:期刊论文
作者 | Li, Yunyang1,2; Wang, Weiyang1,2,3,4; Ge, Mingyu5; Liu, Xiongwei6; Tong, Hao7; Xu, Renxin1,2,8 |
刊名 | ASTROPHYSICAL JOURNAL |
出版日期 | 2018-02-20 |
卷号 | 854期号:2页码:9 |
ISSN号 | 0004-637X |
关键词 | accretion, accretion disks pulsars: individual (Calvera1RXS J141256.0+792204) stars: neutron |
DOI | 10.3847/1538-4357/aaa671 |
英文摘要 | Calvera is a unique 59 ms isolated pulsar, because it cannot be detected by radio, optical, and gamma-rays; however, it is detectable through the purely thermal emission in soft X-rays. It is suggested that Calvera could be an ordinary middle-aged pulsar with significant magnetospheric activity at a large distance. Alternatively, it is proposed in this paper that Calvera is a low-mass strangeon star with an inactive magnetosphere (dead). In this scenario, we jointly fit the spectra obtained by the XMM-Newton Observatory and the Chandra X-ray Observatory with the strangeon star atmosphere model. The spectral model is successful in explaining the radiation properties of Calvera and X-ray dim isolated neutron stars, both of which show similar observation features. Within the dead pulsar picture, Calvera might have a high temperature at 0.67 keV, possess a small stellar radius, R less than or similar to 4 km, presumably have a small magnetic field, B less than or similar to 10(11) G, and is probably braked by the fallback disk accretion. Future advanced facilities may provide unique opportunities to understand the real nature of Calvera. |
WOS关键词 | ISOLATED NEUTRON-STARS ; X-RAY PULSARS ; 1RXS J141256.0+792204 CALVERA ; CENTRAL COMPACT OBJECTS ; SOFT GAMMA-REPEATERS ; LONG-TERM EVOLUTION ; MAGNETIC-FIELDS ; BLACK-HOLE ; SPIN-DOWN ; RADIO PULSARS |
资助项目 | National Key R&D Program of China[2017YFA0402600] ; National Natural Science Foundation of China[11673002] ; National Natural Science Foundation of China[U1531243] ; National Natural Science Foundation of China[U1531137] ; Strategic Priority Research Program of CAS[XDB23010200] |
WOS研究方向 | Astronomy & Astrophysics |
语种 | 英语 |
出版者 | IOP PUBLISHING LTD |
WOS记录号 | WOS:000425961400002 |
资助机构 | National Key R&D Program of China ; National Natural Science Foundation of China ; Strategic Priority Research Program of CAS ; National Key R&D Program of China ; National Natural Science Foundation of China ; Strategic Priority Research Program of CAS ; National Key R&D Program of China ; National Natural Science Foundation of China ; Strategic Priority Research Program of CAS ; National Key R&D Program of China ; National Natural Science Foundation of China ; Strategic Priority Research Program of CAS |
源URL | [http://ir.bao.ac.cn/handle/114a11/35711] |
专题 | 中国科学院国家天文台 |
通讯作者 | Li, Yunyang |
作者单位 | 1.Peking Univ, Sch Phys, Beijing 100871, Peoples R China 2.Peking Univ, State Key Lab Nucl Phys & Technol, Beijing 100871, Peoples R China 3.Chinese Acad Sci, Natl Astron Observ, Key Lab Computat Astrophys, Beijing 100012, Peoples R China 4.Univ Chinese Acad Sci, Sch Astron & Space Sci, Beijing 100049, Peoples R China 5.Chinese Acad Sci, Inst High Energy Phys, Key Lab Particle Astrophys, Beijing 100049, Peoples R China 6.China West Normal Univ, Sch Phys & Space Sci, Nanchong 637002, Peoples R China 7.Guangzhou Univ, Sch Phys & Elect Engn, Guangzhou 510006, Guangdong, Peoples R China 8.Peking Univ, Kavli Inst Astron & Astrophys, Beijing 100871, Peoples R China |
推荐引用方式 GB/T 7714 | Li, Yunyang,Wang, Weiyang,Ge, Mingyu,et al. Calvera: A Low-mass Strangeon Star Torqued by Debris Disk?[J]. ASTROPHYSICAL JOURNAL,2018,854(2):9. |
APA | Li, Yunyang,Wang, Weiyang,Ge, Mingyu,Liu, Xiongwei,Tong, Hao,&Xu, Renxin.(2018).Calvera: A Low-mass Strangeon Star Torqued by Debris Disk?.ASTROPHYSICAL JOURNAL,854(2),9. |
MLA | Li, Yunyang,et al."Calvera: A Low-mass Strangeon Star Torqued by Debris Disk?".ASTROPHYSICAL JOURNAL 854.2(2018):9. |
入库方式: OAI收割
来源:国家天文台
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