Cool White Dwarfs

Kilic, Mukremin

doi:10.1002/9783527636570.ch2

Cited by 4 publications

(1 citation statement)

References 45 publications

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“…White dwarfs older than a few billion years are expected to naturally cool to luminosities below 10 −4 L [55], and in fact we observe old white dwarfs with luminosities below 10 −4 L [56, 57], and lifetimes above 8 Gyr [28,58,59]. Constraints come from maintaining an EMBH abundance low enough to allow 8 Gyr old white dwarfs to cool below 10 −4 L .…”

Section: White Dwarf Heatingmentioning

confidence: 99%

Constraints on Relic Magnetic Black Holes

Diamond,

Kaplan

2021

Preprint

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We present current direct and astrophysical limits on the cosmological abundance of black holes with extremal magnetic charge. Because they don't Hawking radiate, much lighter primordial black holes could exist today if they are extremal. The dominant constraints come from white dwarf destruction for intermediate masses, and intergalactic gas heating for heavier black holes. Extremal magnetic black holes may catalyze proton decay, and thus we derive robust limits -independent of the catalysis cross section -from the above as well as from white dwarf heating. We discuss other bounds such as those from neutron star heating, solar neutrino production, binary formation and annihilation into gamma rays, and magnetic field destruction. We note that stable magnetically charged black holes can assist in the formation of neutron star mass black holes.

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Section: White Dwarf Heatingmentioning

confidence: 99%

Constraints on Relic Magnetic Black Holes

Diamond,

Kaplan

2021

Preprint

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White Dwarfs

Michaud

Alecian

Richer

2015

Atomic Diffusion in Stars

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Constraints on relic magnetic black holes

Diamond

Kaplan

2022

J. High Energ. Phys.

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We present current direct and astrophysical limits on the cosmological abundance of black holes with extremal magnetic charge. Such black holes do not Hawking radiate, allowing those normally too light to survive to the present to do so. The dominant constraints come from white dwarf destruction for low and intermediate masses (2 × 10−5 g – 4 × 1012 g) and Galactic gas cloud heating for heavier masses (> 4 × 1012 g). Extremal magnetic black holes may catalyze proton decay. We derive robust limits — independent of the catalysis cross section — from the effect this has on white dwarfs. We discuss other bounds from neutron star heating, solar neutrino production, binary formation and annihilation into gamma-rays, and magnetic field destruction. Stable magnetically charged black holes can assist in the formation of neutron star mass black holes.

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Cool White Dwarfs

Cited by 4 publications

References 45 publications

Constraints on Relic Magnetic Black Holes

Constraints on Relic Magnetic Black Holes

White Dwarfs

Constraints on relic magnetic black holes

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