中文

M28 中的两颗新黑寡妇毫秒脉冲星

高能天体物理现象 2022-03-14 v3

摘要

我们报道利用 MeerKAT 望远镜在球状星团 M28 中发现的两颗黑寡妇毫秒脉冲星。PSR J1824-2452M(M28M)是一颗周期为 5.825.82\,小时轨道上的 4.78-ms 脉冲星,PSR J1824-2452N(M28N)是一颗周期为 4.764.76\,小时轨道上的 3.35-ms 脉冲星。两颗脉冲星的色散量均接近 119.30119.30\,pc\,cm3^{-3},且拥有低质量伴星(\sim0.010.030.01-0.03\,M_\odot),未引起强射电食或轨道变化。包含这些系统,M28 中现已知有五颗黑寡妇脉冲星。脉冲星搜寻是 MeerKAT 球状星团普查(隶属于 TRAPUM 大巡天项目)初始阶段的一部分。这些微弱发现展示了 MeerKAT 巡天灵敏度相对于以往搜寻的优势,我们期望在对该星团的持续搜寻中发现更多脉冲星。

关键词

引用

@article{arxiv.2201.11238,
  title  = {Two New Black Widow Millisecond Pulsars In M28},
  author = {Andrew Douglas and Prajwal Padmanabh and Scott Ransom and Alessandro Ridolfi and Paulo Freire and Vivek Venkatraman Krishnan and Ewan Barr and Cristina Pallanca and Mario Cadelano and Andrea Possenti and Ingrid Stairs and Jason Hessels and Megan DeCesar and Ryan Lynch and Matthew Bailes and Marta Burgay and David Champion and Ramesh Karuppusamy and Michael Kramer and Benjamin Stappers and Laila Vleeschower},
  journal= {arXiv preprint arXiv:2201.11238},
  year   = {2022}
}

备注

Accepted to ApJ on 12/28/2021 2/17/2022: Added Acknowledgements, Software, and Facilities sections. Fixed missing 'Total Proper Motion' units in table 2