| High-energy properties of pulsed emission from millisecond pulsars | |
Zhang L(张力)1,2 ; Fang, J1; Chen, SB1; Zhang, L (reprint author), Yunnan Univ, Dept Phys, Kunming 650091, Yunnan, Peoples R China.
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| 发表期刊 | ASTROPHYSICAL JOURNAL
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| 2007-09-10 | |
| 卷号 | 666期号:2页码:1165-1173 |
| DOI | 10.1086/520490 |
| 产权排序 | 第2完成单位 |
| 收录类别 | SCI |
| 关键词 | Gamma Rays : Theory Pulsars : General Radiation Mechanisms : Nonthermal Radiation Mechanisms : Thermal Stars : Neutron X-rays : General |
| 摘要 | We make a modification of our previous outer gap model of high-energy emission from millisecond pulsars (MSPs) by taking the effects of the magnetic inclination angles and magnetic geometry into account. In the revised version of our outer gap model, a strong multipole magnetic field exists near the stellar surface, and the X-rays are produced by the backflow current of the outer gap and consist of one power-law and two thermal components. These X-rays collide with high-energy photons inside the outer gap to sustain the outer gap, and then high-energy gamma-rays are produced in the outer gap. The fractional size of the outer gap is a function of the radial distance to the neutron star and the magnetic inclination angle for a given millisecond pulsar. We have applied this model to account for the pulsed X-ray emission from the MSPs outside of and in the globular cluster 47 Tuc, and our results indicate that the relation between the pulsed component of X-ray luminosity (L-X, pul(theo)) and the pulsar spin-down power (L-sd) satisfies (L-X, pul(theo)) proportional to L-sd(1.17 +/- 0.10) for the MSPs outside of 47 Tuc and Ltheo (L-X, pul(theo)) proportional to L-SD(0.58 +/- 0.06) for the MSPs in 47 Tuc, which is consistent with the relation between the observed pulsed component of X-ray luminosity (L-X, pul(obs)) and L-sd: L-X, pul(obs) proportional to L-sd(1.12 +/- 0.10) for the MSPs outside of 47 Tuc and L-X, pul(obs) proportional to L-sd(0.24 +/- 0.43) sd for the MSPs in 47 Tuc. We also applied our model to predict the averaged high-energy gamma-ray fluxes and to compare them with the sensitivity of AGILE and GLAST. |
| 语种 | 英语 |
| 学科领域 | Astronomy & Astrophysics |
| 文章类型 | Article |
| ISSN | 0004-637X |
| URL | 查看原文 |
| WOS记录号 | WOS:000249305700043 |
| WOS研究方向 | Astronomy & Astrophysics |
| WOS类目 | Astronomy & Astrophysics |
| 关键词[WOS] | X-RAY-EMISSION ; CRUSTAL PLATE-TECTONICS ; ROTATION-POWERED PULSARS ; STAR MAGNETIC-FIELDS ; GAMMA-RAY ; NEUTRON-STARS ; OUTER GAPS ; RADIATION ; LUMINOSITY ; EVOLUTION |
| 引用统计 | |
| 文献类型 | 期刊论文 |
| 条目标识符 | http://ir.ynao.ac.cn/handle/114a53/4214 |
| 专题 | 其他 |
| 通讯作者 | Zhang, L (reprint author), Yunnan Univ, Dept Phys, Kunming 650091, Yunnan, Peoples R China. |
| 作者单位 | 1.Department of Physics, Yunnan University, Kunming, Yunnan, China 2.National Astronomical Observatories/Yunnan Observatory, Chinese Academy of Sciences, P.O. Box 110, Kunming, China |
| 第一作者单位 | 中国科学院云南天文台 |
| 推荐引用方式 GB/T 7714 | Zhang L,Fang, J,Chen, SB,et al. High-energy properties of pulsed emission from millisecond pulsars[J]. ASTROPHYSICAL JOURNAL,2007,666(2):1165-1173. |
| APA | Zhang L,Fang, J,Chen, SB,&Zhang, L .(2007).High-energy properties of pulsed emission from millisecond pulsars.ASTROPHYSICAL JOURNAL,666(2),1165-1173. |
| MLA | Zhang L,et al."High-energy properties of pulsed emission from millisecond pulsars".ASTROPHYSICAL JOURNAL 666.2(2007):1165-1173. |
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