Neutron Stars and Pulsars Studies

中子星和脉冲星研究

• 批准号: 0206358
• 负责人: Shrinivas Kulkarni
• 金额: $ 33.66万
• 依托单位: California Institute of Technology
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2002
• 资助国家: 美国
• 起止时间: 2002-07-15 至 2006-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0206358&HistoricalAwards=false
• 关键词: Neutron; Stars; Pulsars; Studies

AST-0206358PI KulkarniNeutron stars are exotic remnants of stellar evolution. First identified as isolated radio pulsars and X-ray emitting binaries, the number and variety of such systems has grown enormously in the last two decades with the discovery of rapid (millisecond) radio and X-ray pulsars, soft gamma-ray pulse repeaters, relativistic binary systems, etc. Along with this diversity is mounting evidence of a tremendous range in magnetic field strength. This contributes to the interest in neutron stars as laboratories for physics under extreme conditions and as tracers of the evolution of massive stars. This project pursues three basic areas of research. The investigators in this team (including two graduate students) will carry out the first coherent census of all classes of neutrons stars within 5 kpc of the sun, perform a deep search toward globular clusters for sub-millisecond pulsars using the Parkes radio telescope (Australia), and the new Green Bank Telescope (West Virginia), and with improved instrumentation at Parkes determine distances and binary component masses for a sample of pulsars and contribute to placing new limits on long-period gravitational waves.***

AST-0206358 PI Kulkarni中子星是恒星演化的奇异遗迹。首先被确定为孤立的射电双星和X射线发射双星，在过去的二十年中，随着快速（毫秒）射电和X射线双星、软伽马射线脉冲中继器、相对论双星系统等的发现，这种系统的数量和种类有了巨大的增长。沿着这种多样性的是越来越多的证据表明磁场强度的巨大范围。这有助于中子星作为极端条件下的物理实验室和大质量恒星演化的示踪剂的兴趣。 该项目追求三个基本研究领域。这个小组的调查员（包括两名研究生）将对距离太阳5千秒差距以内的各类中子星进行首次相干普查，利用帕克斯射电望远镜对球状星团进行亚毫秒级中子星的深度搜索（澳大利亚），以及新的绿色银行望远镜（西弗吉尼亚州），利用帕克斯改进的仪器，确定了一个双星样本的距离和双星分量质量，并有助于对长周期引力波施加新的限制。**