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Title: White dwarfs as dark matter detectors

Journal Article · · Physical Review D

Dark matter that is capable of sufficiently heating a local region in a white dwarf will trigger runaway fusion and ignite a type Ia supernova. This was originally proposed by Graham et al. and used to constrain primordial black holes which transit and heat a white dwarf via dynamical friction. In this paper, we consider dark matter (DM) candidates that heat through the production of high-energy standard model (SM) particles, and show that such particles will efficiently thermalize the white dwarf medium and ignite supernovae. Based on the existence of long-lived white dwarfs and the observed supernovae rate, we derive new constraints on ultraheavy DM with masses greater than 1016 GeV which produce SM particles through DM-DM annihilations, DM decays, and DM-SM scattering interactions in the stellar medium. As a concrete example, we place bounds on supersymmetric Q-ball DM in parameter space complementary to terrestrial bounds. We put further constraints on DM that is captured by white dwarfs, considering the formation and self-gravitational collapse of a DM core which heats the star via decays and annihilations within the core. It is also intriguing that the DM-induced ignition discussed in this work provide an alternative mechanism of triggering supernovae from sub-Chandrasekhar, nonbinary progenitors.

Research Organization:
Stanford Univ., CA (United States)
Sponsoring Organization:
USDOE Office of Science (SC); National Science Foundation (NSF); Alfred P. Sloan Foundation; Simons Foundation; Heising-Simons Foundation
Grant/Contract Number:
SC0012012; PHY-1720397; PHY-1638509; PHY-1507160; FG-2016-6193; 378243; 2015-037
OSTI ID:
1488901
Alternate ID(s):
OSTI ID: 1611729
Journal Information:
Physical Review D, Journal Name: Physical Review D Vol. 98 Journal Issue: 11; ISSN 2470-0010
Publisher:
American Physical SocietyCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 41 works
Citation information provided by
Web of Science

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