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arXiv 2409.11291astro-ph.HEastro-ph.GA
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利用当前和未来巡天探测千新星遗迹的特征与前景

Features and prospects for kilonova remnant detection with current and future surveys

Sandeep Kumar Acharya, Paz Beniamini, Kenta Hotokezaka

AI总结:

本文解析研究千新星遗迹的光谱与时间特征及射电巡天探测前景,并利用当前未发现候选体的事实约束极端千新星比例不超过30%。

摘要:

我们通过解析方法研究了千新星遗迹(KNR)的可观测光谱和时间性质,并指出了其与超新星遗迹之间的定量差异。我们在正在进行的射电巡天背景下给出了 KNR 的探测前景。我们发现,在流量阈值约为 0.1 mJy 的未来巡天中,很有希望观测到数十个这类天体。由中子星并合产生的、假设存在的长寿命超大质量中子星遗迹所形成的千新星遗迹甚至更有可能被探测到,因为它们极其明亮且达到峰值更早。对于阈值约为 1 mJy 的正在进行的巡天,如果这类天体在千新星(KN)总族群中占有显著比例,我们预计会发现数十到数百个此类天体。考虑到目前正在进行的巡天中尚不存在这样有希望的 KN 候选体,我们将这些极端 KN 所占比例限制为不超过整个 KN 族群的 30%。该约束对抛射物质量和外部密度分布的细节具有敏感依赖。

英文摘要:

We study the observable spectral and temporal properties of kilonova remnants (KNRs) analytically, and point out quantitative differences with respect to supernova remnants. We provide detection prospects of KNRs in the context of ongoing radio surveys. We find that there is a good chance to expect tens of these objects in future surveys with a flux threshold of $\sim 0.1$ mJy. Kilonova remnants from a postulated population of long-lived supermassive neutron star remnants of neutron star mergers are even more likely to be detected, as they are extremely bright and peak earlier. For an ongoing survey with a threshold of $\sim$ 1 mJy, we expect to find tens to hundreds of such objects if they are a significant fraction of the total kilonova (KN) population. Considering that there are no such promising KN candidates in presently ongoing surveys, we constrain the fraction of these extreme KN to be no more than 30 percent of the overall KN population. This constraint depends sensitively on the details of ejecta mass and external density distribution.

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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