A Program for Multimessenger Standard Siren Cosmology in the Era of LIGO A+, Rubin Observatory, and Beyond
A Program for Multimessenger Standard Siren Cosmology in the Era of LIGO A+, Rubin Observatory, and Beyond
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DOI：
10.3847/2041-8213/abdab0
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发表时间：
2020-11
期刊：
影响因子：
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通讯作者：
Hsin-Yu Chen;P. Cowperthwaite;B. Metzger;E. Berger
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文献类型：
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作者：
Hsin-Yu Chen;P. Cowperthwaite;B. Metzger;E. Berger
标准siren技术最有希望的变化是将双中子星（BNS）合并的引力波（GW）数据与电磁（EM）对应的红移测量相结合，以约束宇宙学参数，如H0， Ωm和w0。在这里，我们评估了未来GW天文台时代的多信使宇宙学的近期和长期前景：先进的LIGO Plus （A+， 2025年），类似旅行者的探测器（2030年）和类似宇宙探索者的探测器（2035年及以后）。我们证明了A+的BNS视界距离≈700 Mpc与Vera C. Rubin天文台（VRO）探测千新星的灵敏度很好地匹配。我们发现，一年的A+和VRO联合观测将把H0的值约束到百分比水平的精度，因为VRO时间的一小部分投资专门用于机会目标GW的跟踪。在旅行者号时代，BNS-kilonova的观测开始限制Ωm，因为VRO时间的几个百分点的投资。在宇宙探索者时代，由于BNS视界距离更大，轴上短伽马射线暴（sgrb）及其余辉（尽管只伴随一些gw探测到的合并）取代了千新星，成为最有希望用于红移识别的对应物。我们表明，用类似宇宙探索者的设施和下一代伽马射线卫星进行5年的联合观测，其定位能力与目前使用Swift可能实现的定位能力相似，可以将Ωm和w0限制在15%-20%。因此，我们提倡一个强大的机会目标（ToO）计划，包括VRO，以及在2030年代提高灵敏度的宽视场伽马射线卫星，以实现下一代引力波设施的标准警号宇宙学。
The most promising variation of the standard siren technique combines gravitational-wave (GW) data for binary neutron star (BNS) mergers with redshift measurements enabled by their electromagnetic (EM) counterparts, to constrain cosmological parameters such as H0, Ωm, and w0. Here we evaluate the near- and long-term prospects of multimessenger cosmology in the era of future GW observatories: Advanced LIGO Plus (A+, 2025), Voyager-like detectors (2030s), and Cosmic Explorer–like detectors (2035 and beyond). We show that the BNS horizon distance of ≈ 700 Mpc for A+ is well matched to the sensitivity of the Vera C. Rubin Observatory (VRO) for kilonova detections. We find that one year of joint A+ and VRO observations will constrain the value of H0 to percent-level precision, given a small investment of VRO time dedicated to target-of-opportunity GW follow-up. In the Voyager era, the BNS–kilonova observations begin to constrain Ωm with an investment of a few percent of VRO time. With the larger BNS horizon distance in the Cosmic Explorer era, on-axis short gamma-ray bursts (SGRBs) and their afterglows (though accompanying only some of the GW-detected mergers) supplant kilonovae as the most promising counterparts for redshift identification. We show that five years of joint observations with Cosmic Explorer–like facilities and a next-generation gamma-ray satellite with localization capabilities similar to that presently possible with Swift could constrain both Ωm and w0 to 15%–20%. We therefore advocate for a robust target-of-opportunity (ToO) program with VRO, and a wide-field gamma-ray satellite with improved sensitivity in the 2030s, to enable standard siren cosmology with next-generation gravitational-wave facilities.