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5 votes
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Do “neutrino supernovae” exist?

The answer appears to be yes. Unless the accretion-induced-collapse (AIC) supernova interacts with a close companion (see below) then the supernova will be much fainter optically than a Type II core-...
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7 votes

Why haven’t we observed supernova events of the hypothetical population III stars?

Massive Population III stars are thought to predominantly exist for a short period of time during the initial stages of galaxy formation and prior to the epoch of reionisation at $z \sim 6-20$ (though ...
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11 votes
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Why haven’t we observed supernova events of the hypothetical population III stars?

The problem is really the distance here. I believe the most distant supernova ever observed is SN 1000+0216 at redshift 3.9. This observation was possible only because of the extremely high and ...
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18 votes
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Metallicity in gravitational wave astronomy

As you say, metallicity in this context refers to the proportion of the interstellar medium a star forms from that consists of elements heavier than helium. It can be expressed as a (mass) fraction (...
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