A possible origin of the galactic center magnetar sgr 1745-2900
文献类型：期刊论文
| 作者 | Cheng, Quan1; Zhang, Shuang-Nan1; Zheng, Xiao-Ping2 |
| 刊名 | Research in astronomy and astrophysics
 |
| 出版日期 | 2017-06-01 |
| 卷号 | 17期号:6页码:8 |
| 关键词 | Stars: neutron Stars: magnetars Stars: magnetic field Pulsars: individual (sgr 1745-2900) |
| ISSN号 | 1674-4527 |
| DOI | 10.1088/1674-4527/17/6/54 |
| 通讯作者 | Cheng, quan(qcheng@ihep.ac.cn) |
| 英文摘要 | Since there is a large population of massive o/b stars and putative neutron stars (nss) located in the vicinity of the galactic center (gc), intermediate-mass x-ray binaries (imxbs) constituted by an ns and a b-type star probably exist there. we investigate the evolutions of accreting nss in imxbs (similar to m82 x-2) with a similar to 5.2m circle dot companion and orbital period similar or equal to 2.53 d. by adopting a mildly super-eddington rate. m = 6 x 10(-8) m circle dot yr(-1) for the early case b roche-lobe overflow (rlof) accretion, we find that only in accreting nss with quite elastic crusts (slippage factor s = 0.05) can the toroidal magnetic fields be amplified within 1 myr, which is assumed to be the longest duration of the rlof. these imxbs will evolve into ns+white dwarf (wd) binaries if they are dynamically stable. however, before the formation of ns+wd binaries, the high stellar density in the gc will probably lead to frequent encounters between the ns+evolved star binaries (in post-early case b mass transfer phase) and nss or exchange encounters with other stars, which may produce single nss. these nss will evolve into magnetarswhen the amplified poloidal magnetic fields diffuse out to the ns surfaces. consequently, our results provide a possible explanation for the origin of the gc magnetar sgr 1745-2900. moreover, the accreting nss with s > 0.05 will evolve into millisecond pulsars (msps). therefore, our model reveals that the gc magnetars and msps could both originate from a special kind of imxb. |
| WOS关键词 | SAGITTARIUS-A-ASTERISK ; X-RAY BINARIES ; ROTATING RELATIVISTIC STARS ; SUPERMASSIVE BLACK-HOLE ; SOFT GAMMA-REPEATERS ; NEUTRON-STARS ; ENERGY INJECTION ; RADIO PULSARS ; MILLISECOND MAGNETAR ; SWIFT J1822.3-1606 |
| WOS研究方向 | Astronomy & Astrophysics |
| WOS类目 | Astronomy & Astrophysics |
| 语种 | 英语 |
| WOS记录号 | WOS:000408362700006 |
| 出版者 | NATL ASTRONOMICAL OBSERVATORIES, CHIN ACAD SCIENCES |
| URI标识 | http://www.irgrid.ac.cn/handle/1471x/2177000 |
| 专题 | 高能物理研究所 |
| 通讯作者 | Cheng, Quan |
| 作者单位 | 1.Chinese Acad Sci, Inst High Energy Phys, Key Lab Particle Astrophys, Beijing 100049, Peoples R China 2.Cent China Normal Univ, Inst Astrophys, Wuhan 430079, Hubei, Peoples R China |
| 推荐引用方式 GB/T 7714 | Cheng, Quan,Zhang, Shuang-Nan,Zheng, Xiao-Ping. A possible origin of the galactic center magnetar sgr 1745-2900[J]. Research in astronomy and astrophysics,2017,17(6):8. |
| APA | Cheng, Quan,Zhang, Shuang-Nan,&Zheng, Xiao-Ping.(2017).A possible origin of the galactic center magnetar sgr 1745-2900.Research in astronomy and astrophysics,17(6),8. |
| MLA | Cheng, Quan,et al."A possible origin of the galactic center magnetar sgr 1745-2900".Research in astronomy and astrophysics 17.6(2017):8. |
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来源：高能物理研究所
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