Two Candidate Pulsar TeV Halos Identified from Property-similarity Studies

IF 4.8 2区 物理与天体物理 Q1 ASTRONOMY & ASTROPHYSICS
Dong Zheng, Zhongxiang Wang
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Abstract

Abstract Teraelectronvolt halos have been suggested to be a common phenomenon associated with middle-aged pulsars. Based on our recent work on the middle-aged pulsar J0631+1036, which is the only known source positionally coincident with a hard teraelectronvolt γ -ray source and likely powers the latter as a teraelectronvolt halo, we select three candidate teraelectronvolt halos from the first Large High Altitude Air Shower Observatory (LHAASO) catalog of γ -ray sources. The corresponding pulsars, given by the positional coincidences and property similarities, are PSR J1958+2846, PSR J2028+3332, and PSR J1849-0001. We analyze the gigaelectronvolt γ -ray data obtained with the Large Area Telescope on board the Fermi Gamma-ray Space Telescope for the first two pulsars, as the last is γ -ray quiet. We remove the pulsed emissions of the pulsars from the source regions from timing analysis, and determine that there are no residual gigaelectronvolt emissions in the regions as any possible counterparts to the teraelectronvolt sources. Considering the previous observational results for the source regions and comparing the two pulsars to Geminga (and Monogem), the LHAASO-detected teraelectronvolt sources are likely the pulsars’ respective teraelectronvolt halos. We find that the candidate and identified teraelectronvolt halos, including that of PSR J1849-0001, have luminosities at 50 TeV (estimated from the differential fluxes) approximately proportional to the spin-down energy E ̇ of the pulsars, and the ratios of the former to the latter are ∼6 × 10 −4 .
从性质相似性研究中确定的两个候选脉冲星TeV晕
太电子伏晕被认为是一种与中年脉冲星相关的常见现象。基于我们最近对中年脉冲星J0631+1036的研究,我们从第一个大型高空空气簇射天文台(LHAASO)的γ射线源目录中选择了三个候选的太电子伏晕,J0631+1036是唯一已知的与硬太电子伏γ射线源位置一致的源,并且可能以太电子伏晕的形式为后者提供动力。根据位置巧合和性质相似度,对应的脉冲星分别是PSR J1958+2846、PSR J2028+3332和PSR J1849-0001。我们分析了Fermi伽玛射线空间望远镜上的大面积望远镜获得的前两颗脉冲星的千兆电子伏特γ射线数据,因为最后一颗是γ射线安静的。我们从时序分析中去除脉冲星源区的脉冲发射,并确定在这些区域中没有残留的千兆电子伏特发射作为任何可能的太电子伏特源的对应物。考虑到先前对源区域的观测结果,并将这两颗脉冲星与Geminga(和Monogem)进行比较,lhaaso检测到的太电子伏源很可能是脉冲星各自的太电子伏晕。我们发现候选和鉴定的太电子伏晕,包括PSR J1849-0001的太电子伏晕,其亮度在50 TeV(根据差通量估计),与脉冲星的自旋下能量E ^ (E ^)近似成正比,前者与后者的比值为~ 6 × 10−4。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
Astrophysical Journal
Astrophysical Journal 地学天文-天文与天体物理
CiteScore
8.40
自引率
30.60%
发文量
2854
审稿时长
1 months
期刊介绍: The Astrophysical Journal is the foremost research journal in the world devoted to recent developments, discoveries, and theories in astronomy and astrophysics.
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