| Radio Emission from Globular Clusters |
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| 作者姓名： | Xiao－HuiSun Jin－LinHan 等 |
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| 作者单位： | Xiao-Hui Sun，Jin-Lin Han and Guo Jun Qiao Department of Astronomy，Peking University，Beijing 100871 National Astronomical Observatories，Chinese Academy of Sciences，Beijing 100012 Beijing Astrophysical Center，CAS-PKU，Beijing 1008 |
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| 基金项目： | 国家自然科学基金，国家重点基础研究发展计划(973计划)，well as the partner group of MPIfR at NAOC |
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| 摘 要： | 1 INTRODUCTION Many radio observations have been conducted on globular clusters in the past years, stimu-lated by the detection of pulsars and X-ray sources in them. Globular clusters are good placesfor hunting pulsars (Lyne et al. 2000). Until now, about 50 pulsars have been detected in 17globular clusters (Lyne et al. 1995; Biggs & Lyne 1996; D'Amico et al. 2001; Lyne et al. 2000;Camilo et al. 2000). Except for four long period pulsars, all of these pulsars are millisecondpulsars (M…
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| 关 键 词： | 环状体 脉冲量 无线电放射 黑洞 中子星 |
Radio Emission from Globular Clusters |
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| Xiao-Hui Sun,Jin-Lin Han,Guo-Jun Qiao.Radio Emission from Globular Clusters[J].Chinese Journal of Astronomy and Astrophysics,2002,2(2):133-145. |
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| Authors: | Xiao-Hui Sun Jin-Lin Han Guo-Jun Qiao |
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| Institution: | [1]DepartmentofAstronomy,PekingUniversity,Beijing100871 [2]NationalAstronomicalObservatories,ChineseAcademyofSciences,Beijing100012 |
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| Abstract: | Radio emission of globular clusters is studied by analyzing the VLA radio survey data of the NVSS and FIRST. We find that 13 clusters have radio sources within their half-mass radii of clusters. Sources detected previously in NGC 7078 and NGC 6440 are identified. Pulsars in NGC 6121,NGC 6440 and NGC 7078 cannot be detected because of the insufficient survey sensitivity and resolution. There may be a pulsar in the core of Terzan 1. The nature of the extended radio source near the core of NGC 6440 remains unclear. In the core of a globular cluster, there may be many neutron strars or an intermediate mass black hole, but this cannot be clarified with the current radio observations. |
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| Keywords: | globular clusters: general pulsars: general radio continuum:general |
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