Questions tagged [white-dwarf]

Questions about electron degenerate stellar remnants.

7 questions with no upvoted or accepted answers
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Uranium accumulating inside a White Dwarf?

A couple of days ago, there was news that "Some dead stars may harbor enough uranium to set off a thermonuclear bomb", which is basically a teaser for Actinide crystallization and fission ...
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Can mass loss via accretion occur on stellar remnants?

We know that normal stars can lose mass to a binary companion. But can this happen to neutron stars and white dwarfs? Let's say a stellar black hole is being orbited by a white dwarf or neutron star. ...
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How long does it take for a white dwarf to undergo a type Ia supernova?

I read about white dwarfs and their relation to Type Ia supernovae, and I want to know how much time passes between when the white dwarf passes the Chandrasekhar limit and when the white dwarf ...
2
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Could an Applegate-like mechanism operate in AM CVn systems?

One of the controversies surrounding the detection of exoplanets around post-common envelope binaries is the possibility that the orbital period variations observed might be the result of the ...
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55 views

What would happen if a neutron star merged with a white dwarf?

We've heard of neutron star mergers and white dwarf mergers. But what would result in a neutron star merging with a white dwarf? Would there be a similar super/kilonova, are there any examples of it, ...
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Are the terms “PG 1159 star” and “pre-white dwarf” synonymous?

Are the terms "pre-white dwarf" (as in Gies et al. 2020, "Spectroscopic Detection of the Pre-White Dwarf Companion of Regulus") and "PG 1159 star" (as described, e.g. in ...
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How bright would a magically created 13.7B years ago white dwarf be now?

I assumed that the initial brightness is $1$, and at death it is $10^{-20}$ (since I can't reach 0 with exponentiation, it will be close enough to 0), and it lived $10^{15}$ years. Then I solved an ...