NuSTAR OBSERVATIONS OF THE STATE TRANSITION OF MILLISECOND PULSAR BINARY PSR J1023+0038
文献类型：期刊论文
| 作者 | Tendulkar, Shriharsh P.; Yang, Chengwei; An, Hongjun; Kaspi, Victoria M.; Archibald, Anne M.; Bassa, Cees; Bellm, Eric; Bogdanov, Slavko; Harrison, Fiona A.; Hessels, Jason W. T. |
| 刊名 | ASTROPHYSICAL JOURNAL
 |
| 出版日期 | 2014 |
| 卷号 | 791期号:2页码:77 |
| ISSN号 | 0004-637X |
| 关键词 | pulsars: general pulsars: individual (PSR J1023+0038) stars: neutron X-rays: stars |
| 通讯作者 | Tendulkar, SP (reprint author), CALTECH, 1200 E Calif Blvd,MC 249-17, Pasadena, CA 91125 USA. |
| 英文摘要 | We report NuSTAR observations of the millisecond pulsar-low-mass X-ray binary (LMXB) transition system PSR J1023+0038 from 2013 June and October, before and after the formation of an accretion disk around the neutron star. Between June 10 and 12, a few days to two weeks before the radio disappearance of the pulsar, the 3-79 keV X-ray spectrum was well fit by a simple power law with a photon index of Gamma = 1.17(-0.07)(+0.08) (at 90% confidence) with a 3-79 keV luminosity of 7.4 +/- 0.4 x 10(32) erg s(-1). Significant orbital modulation was observed with a modulation fraction of 36% +/- 10%. During the October 19-21 observation, the spectrum is described by a softer power law (Gamma = 1.66(-0.05)(+0.06)) with an average luminosity of 5.8 +/- 0.2x10(33) erg s(-1) and a peak luminosity of approximate to 1.2x10(34) erg s(-1) observed during a flare. No significant orbital modulation was detected. The spectral observations are consistent with previous and current multiwavelength observations and show the hard X-ray power law extending to 79 keV without a spectral break. Sharp-edged, flat-bottomed dips are observed with widths between 30 and 1000 s and ingress and egress timescales of 30-60 s. No change in hardness ratio was observed during the dips. Consecutive dip separations are log-normal in distribution with a typical separation of approximately 400 s. These dips are distinct from dipping activity observed in LMXBs. We compare and contrast these dips to observations of dips and state changes in the similar transition systems PSR J1824-2452I and XSS J1227.0-4859 and discuss possible interpretations based on the transitions in the inner disk. |
| 收录类别 | SCI |
| 语种 | 英语 |
| 源URL | [http://ir.nssc.ac.cn/handle/122/4402]  |
| 专题 | 国家空间科学中心_空间技术部 |
| 推荐引用方式 GB/T 7714 | Tendulkar, Shriharsh P.,Yang, Chengwei,An, Hongjun,et al. NuSTAR OBSERVATIONS OF THE STATE TRANSITION OF MILLISECOND PULSAR BINARY PSR J1023+0038[J]. ASTROPHYSICAL JOURNAL,2014,791(2):77. |
| APA | Tendulkar, Shriharsh P..,Yang, Chengwei.,An, Hongjun.,Kaspi, Victoria M..,Archibald, Anne M..,...&Zhang, William.(2014).NuSTAR OBSERVATIONS OF THE STATE TRANSITION OF MILLISECOND PULSAR BINARY PSR J1023+0038.ASTROPHYSICAL JOURNAL,791(2),77. |
| MLA | Tendulkar, Shriharsh P.,et al."NuSTAR OBSERVATIONS OF THE STATE TRANSITION OF MILLISECOND PULSAR BINARY PSR J1023+0038".ASTROPHYSICAL JOURNAL 791.2(2014):77. |
入库方式： OAI收割
来源：国家空间科学中心
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