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2
votes
1answer
139 views
is this generalized Hawking radiation formula right?
Look at equation 11.2.17 in this page. The expression is:
$$ T = 10^{-5} \text{K m} \frac{\xi}{\frac{GM}{c^2} \lbrace \frac{GM}{c^2} + \xi \rbrace - e^2 }$$
where
$$ \xi = (r_s^2 - a^2 - ...
2
votes
1answer
94 views
Kerr-Newman black holes and infinite charge
Recall the first law of BH thermodynamics
$ dM=\frac{\kappa}{8\pi} dA + \Omega dJ + \Phi dQ $
Now, let's consider the Reissner-Nordstrom solution $J=0$ such that $m>Q$ but only slightly greater. ...
11
votes
2answers
456 views
If a Kerr-Newman black hole is like a charged, spinning, heavy magnet, what kind of magnet is it like?
I was reading up on De Sitter spaces, which states that the gravitational effects from a black hole is indistinguishable from any other spherically symmetric mass distribution. This makes a lot of ...
