Neutron Stars and Pulsars Studies

中子星是恒星演化的奇异残留物。最初被确定为孤立的射电脉冲星和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射线脉冲星、软伽马射线脉冲中继器、相对论双星系统等的发现，这类系统的数量和种类都大大增加。随着这种多样性，越来越多的证据表明，磁场强度的范围是巨大的。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。这个项目进行三个基本领域的研究。该团队的研究人员（包括两名研究生）将对距离太阳5kpc内所有类别的中子星进行首次连续普查，并使用帕克斯射电望远镜（澳大利亚）和新的格林班克望远镜（西弗吉尼亚州）对亚毫秒脉冲星的球状星团进行深入搜索。并利用帕克斯天文台改进的仪器确定脉冲星样本的距离和双星分量质量，并对长周期引力波作出新的限制

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.***