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arXiv · 2009.05209

A gravitational-wave limit on the Chandrasekhar mass of dark matter

Divya Singh·Michael Ryan·Ryan Magee·Towsifa Akhter·Sarah Shandera·Donghui Jeong·Chad Hanna
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Abstract

We explore a new paradigm to study dissipative dark matter models using gravitational-wave observations. We consider a dark atomic model which predicts the formation of binary black holes such as GW190425 while obeying constraints from large-scale structure, and improving on the missing satellite problem. Using LIGO and Virgo gravitational-wave data from 12th September 2015 to 1st October 2019, we show that interpreting GW190425 as a dark matter black-hole binary limits the Chandrasekhar mass for dark matter to be below 1.4 $M_\odot$ at $> 99.9\%$ confidence implying that the dark proton is heavier than 0.95 GeV, while also suggesting that the molecular energy-level spacing of dark molecules lies near $10^{-3}$ eV and constraining the cooling rate of dark matter at low temperatures.

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Divya Singh, Michael Ryan, Ryan Magee, Towsifa Akhter, Sarah Shandera, Donghui Jeong, Chad Hanna. 2020-09-11. A gravitational-wave limit on the Chandrasekhar mass of dark matter. https://doi.org/10.1103/physrevd.104.044015

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