Schwarzschild Black Hole
A
Schwarzschild black hole
or
static black hole
is a
black hole
fully defined by its only parameter, the mass
M
. In general black holes could have in addition
angular momentum
(
rotating black holes
) and
electric charge
(see
charged black holes
). A Schwarzschild black hole has zero angular momentum and no charge. The Schwarzschild black hole is characterized by a surrounding area, called the
event horizon
which is situated at the
Schwarzschild radius
, often called the radius of a black hole. Any non-rotating and non-charged mass that is smaller than the Schwarzschild radius forms a black hole. The static black hole is represented by the
Schwarzschild metric
, a solution to the
Einstein field equations
for a point mass in empty space (vacuum), found by
Karl Schwarzschild
in 1916. The solution of the
Einstein field equations
is valid for any mass
M
, so in principle (according to
general relativity
theory) a Schwarzschild black hole of any mass could exist if nature is kind enough to form one.
See also
black hole
, a general review
Reissner-Nordstrm black hole
Black holes by type
rotating black hole
or Kerr black hole
charged black hole
, Newman black hole and Kerr-Newman black hole
A classification by mass
micro black hole
and extra-dimensional black hole
primordial black hole
, a hypothetical leftover of the Big Bang
stellar black hole
, which could either be a static black hole or a rotating black hole
supermassive black hole
, which could also either be a static black hole or a rotating black hole
Hawking radiation
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