Elastic scattering of cosmological gravitational wave backgrounds: primordial black holes and stellar objects

被引：0

作者：

Howard, Marcell ^{[1
]}

Konig, Morgane ^{[2
]}

机构：

[1] Univ Pittsburgh, Pittsburgh Particle Phys Astrophys & Cosmol Ctr, Dept Phys & Astron, Pittsburgh, PA 15260 USA

[2] MIT, Ctr Theoret Phys, Cambridge, MA 02139 USA

来源：

JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS | 2024年 / 01期

关键词：

primordial black holes; primordial gravitational waves (theory); stars; white and brown dwarfs; RADIATION;

D O I：

10.1088/1475-7516/2024/01/045

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Primordial black holes (PBHs) are plausible dark matter candidates that formed from the gravitational collapse of primordial density fluctuations. Current observational constraints allow asteroid -mass PBHs to account for all of the cosmological dark matter. We show that elastic scattering of a cosmological gravitational wave background, these black holes generate spectral distortions on the background of 0.3% for cosmologically relevant frequencies without considering coherent scattering and 5% when the coherent enhancement is included. Scattering from stellar objects induce much smaller distortions. Detectability of this signal depends on our ultimate understanding of the unperturbed background spectrum.

引用

页数：18

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