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2009
Abstract A black hole is an object that is inside its event horizon at r=r*: a one-way surface that particles and light can only traverse inward. This chapter studies the spherically symmetric nonrotating Schwarzschild black hole. The metric elements change their respective signs when crossing from r>r∗ to r<r*, leading to ...
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Abstract A black hole is an object that is inside its event horizon at r=r*: a one-way surface that particles and light can only traverse inward. This chapter studies the spherically symmetric nonrotating Schwarzschild black hole. The metric elements change their respective signs when crossing from r>r∗ to r<r*, leading to ...
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Mathematical Physics, 2005
Black holes are predicted by General Relativity and there has been a long search for them. Now they have been observed. General Relativity also predicts effects of high spin of the black hole. There is good reason to believe that the best known black hole is spinning more or less as rapidly as it is allowed to. Now, the search is on for the spin of the
DE PAOLIS, Francesco +3 more
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Black holes are predicted by General Relativity and there has been a long search for them. Now they have been observed. General Relativity also predicts effects of high spin of the black hole. There is good reason to believe that the best known black hole is spinning more or less as rapidly as it is allowed to. Now, the search is on for the spin of the
DE PAOLIS, Francesco +3 more
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Tests for the existence of black holes through gravitational wave echoes
Nature Astronomy, 2017The existence of black holes and spacetime singularities is a fundamental issue in science. Despite this, observations supporting their existence are scarce, and their interpretation is unclear.
V. Cardoso, P. Pani
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Black Holes, White Dwarfs, and Neutron Stars
, 1983S. Shapiro, S. Teukolsky
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2000
According to the generalized second law of thermodynamics, the quantity that never decreases in irreversible processes involving gravity is the sum of the entropy content of ordinary matter plus the entropy provided by the black holes. As the entropy of matter has a statistical description in terms of microscopic degrees of freedom, it seems that the ...
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According to the generalized second law of thermodynamics, the quantity that never decreases in irreversible processes involving gravity is the sum of the entropy content of ordinary matter plus the entropy provided by the black holes. As the entropy of matter has a statistical description in terms of microscopic degrees of freedom, it seems that the ...
openaire +3 more sources