3 ms·
That depends on if they have hair or not, but nobody knows whether they do and it would be extremely impractical to experimentally verify such a thing. That's w
by WJW 5y ago
That depends on if they have hair or not, but nobody knows whether they do and it would be extremely impractical to experimentally verify such a thing. That's what the article is all about.
If they don't have hair then yes, you should be able to estimate mass by measuring their temperature. You would also need to know how far it is though, so that you could compensate for redshift.
- jvanderbot 5y agoOK, that makes sense. In reading TFA I was just kind of blown away that temp, mass, angular momentum, etc, are all so closely tied together.
- tsimionescu 5y agoNote that they are so closely tied together for black holes, not necessarily for other types of objects. Black holes in the GR description are probably simpler than some elementary particles even. However, it's important to note that the GR description is itself not exactly self-consistent, as the curvature is divergent at the center of the black hole (it is infinite, I believe?).