• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>The Astrophysical journal >A 1.4 GHz ARECIBO SURVEY FOR PULSARS IN GLOBULAR CLUSTERS
【24h】

A 1.4 GHz ARECIBO SURVEY FOR PULSARS IN GLOBULAR CLUSTERS

机译：1.4 GHz球状群脉冲的阿雷西博调查

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

We have surveyed all 22 known Galactic globular clusters observable with the Arecibo radio telescope and within 70 kpc of the Sun for radio pulsations at ～ 1.4 GHz. Data were taken with the Wideband Arecibo Pulsar Processor, which provided the large bandwidth and high time and frequency resolution needed to detect fast-spinning, faint pulsars. We have also employed advanced search techniques to maintain sensitivity to short orbital period binaries. These searches have discovered 11 new millisecond pulsars and two promising candidates in five clusters, almost doubling the population of pulsars in the Arecibo-visible globular clusters. Ten of these new pulsars are in binary systems, and three are eclipsing. This survey has discovered significantly more very fast spinning pulsars (P_(spin) (approx ＜ ) 4 ms) and short orbital period systems (P_(orb) (approx ＜ ) 6 hr) than previous surveys of the same clusters. We discuss some properties of these systems, as well as some characteristics of the globular cluster pulsar population in general, particularly its luminosity distribution.
机译：我们已经调查了用Arecibo射电望远镜观测到的所有22个已知银河系球状星团，并且在距太阳约70 kpc的范围内，观测了〜1.4 GHz的无线电脉冲。数据是使用宽带Arecibo脉冲星处理器采集的，该处理器提供了检测快速旋转的微弱脉冲星所需的大带宽以及高时间和频率分辨率。我们还采用了先进的搜索技术来保持对短轨道周期双星的敏感性。这些搜索发现了五个星团中的11个新的毫秒脉冲星和两个有前途的候选星，几乎使Arecibo可见球状星团中的脉冲星总数翻了一番。这些新的脉冲星中有十个处于双星系统中，而三个则处于日蚀状态。这项调查发现，与之前的相同星团调查相比，自转脉冲星（P_（自旋）（约＜）≤4 ms）和短轨道周期系统（P_（orb）（约＜＜6 hr）明显多得多。我们讨论了这些系统的某些特性，以及总体上球状星团脉冲星种群的某些特征，尤其是其光度分布。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号