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arXiv 2603.00293astro-ph.HE
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对六颗银河恒星双星中不可见致密天体脉冲无线电发射的上限限制

Upper Limits on Pulsed Radio Emission from Unseen Compact Objects in Six Galactic Stellar Binaries

Franklin and Marshall College(富兰克林与玛莎兰学院);University of Michigan(密歇根大学);Jet Propulsion Laboratory, California Institute of Technology(加州理工学院喷气推进实验室)

Melanie Ficarra, Fronefield Crawford, T. Joseph W. Lazio

AI总结:

研究对六颗银河恒星双星中不可见致密天体的脉冲无线电发射进行了搜索,发现未检测到信号,得出相关上限限制及可能的解释。

摘要:

我们对六颗银河恒星双星系统中的脉冲星进行了搜索,这些系统的主星是不可见的。所有六个系统估计的主星质量范围可能与中子星一致。我们使用绿银行望远镜在350MHz中心频率下,搜索分散的周期性和单脉冲,覆盖可能的色散措施(DMs)和双星加速度范围。在我们的搜索中未检测到任何天体物理信号。估计的400MHz亮度上限与已知的银河双星脉冲星中观测到的最低值相当或更小。这表明我们观测的系统要么不包含无线电发射的脉冲星,要么包含不朝向我们的脉冲星,或者包含亮度显著低于该已知银河双星脉冲星子集的脉冲星。

英文摘要:

We have conducted a search for radio pulsars in six Galactic stellar binary systems having unseen primary stars. All six systems have estimated primary masses in the range that could be consistent with neutron stars. We used the Green Bank Telescope at a center frequency of 350 MHz to search for dispersed periodicities and single pulses across a range of possible dispersion measures (DMs) and binary accelerations. No astrophysical signals were detected in our search. The estimated 400-MHz luminosity upper limits from the search are comparable to or smaller than the lowest values observed for almost all the known Galactic binary pulsars having cataloged 400 MHz radio luminosities. This implies that the systems we observed either do not harbor radio-emitting pulsars, contain pulsars that do not beam in our direction, or contain pulsars with luminosities that are significantly lower than this subset of the known Galactic binary pulsar population.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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