论文标题

黑暗中的宇宙学:紧凑的二进制形成如何影响重力波宇宙学测量

Cosmology in the dark: How compact binaries formation impact the gravitational-waves cosmological measurements

论文作者

Mastrogiovanni, S., Leyde, K., Karathanasis, C., Chassande-Mottin, E., Steer, D. A., Gair, J., Ghosh, A., Gray, R., Mukherjee, S., Rinaldi, S.

论文摘要

在没有电磁(EM)观测值获得的红移测量的情况下,有关紧凑型恒星质谱的信息可用于从重力波(GW)中推断宇宙学参数。该方法将在使用GWS测量和测试宇宙学的当前和未来的基于地面的GW探测器方面至关重要,在没有相关的EM对应物的情况下,检测到源的大部分部分。在此程序中,我们将讨论这种研究宇宙学方法的前景和局限性。我们将表明,即使假设具有当前灵敏度的GW探测器,哈勃常数的测定也强烈地退化,而黑洞产生的最大质量也是如此。我们将讨论假设基础黑洞事件人群的错误模型如何使哈勃恒定估计值偏向高达40 \%。

Information about the mass spectrum of compact stars can be used to infer cosmological parameters from gravitational waves (GW) in the absence of redshift measurements obtained from electromagnetic (EM) observations. This method will be fundamental in measuring and testing cosmology with GWs for current and future ground-based GW detectors where the majority part of sources are detected without an associated EM counterpart. In this proceeding, we will discuss the prospects and limitations of this approach for studying cosmology. We will show that, even when assuming GW detectors with current sensitivities, the determination of the Hubble constant is strongly degenerate with the maximum mass for black hole production. We will discuss how assuming wrong models for the underlying population of black hole events can bias the Hubble constant estimate up to 40\%.

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