Astronomy and Astrophysics – Astrophysics – General Relativity and Quantum Cosmology
Scientific paper
2011-02-03
Phys.Rev.D83:103003,2011
Astronomy and Astrophysics
Astrophysics
General Relativity and Quantum Cosmology
4 pages, 2 figures. v2: refereed version
Scientific paper
10.1103/PhysRevD.83.103003
The super-massive objects at the center of many galaxies are commonly thought to be black holes. In 4-dimensional general relativity, a black hole is completely specified by its mass $M$ and by its spin angular momentum $J$. All the higher multipole moments of the gravitational field depend in a very specific way on these two parameters. For instance, the mass quadrupole moment is $Q = - J^2/M$. If we can estimate $M$, $J$, and $Q$ for the super-massive objects in galactic nuclei, we over-constrain the theory and we can test the black hole hypothesis. While there are many works studying how this can be done with future observations, in this paper a constraint on the quadrupole moment of these objects is obtained by using the current estimate of the mean radiative efficiency of AGN. In terms of the anomalous quadrupole moment $q$, the bound is $-2.01 < q < 0.14$.
No associations
LandOfFree
Constraint on the quadrupole moment of super-massive black hole candidates from the estimate of the mean radiative efficiency of AGN does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Constraint on the quadrupole moment of super-massive black hole candidates from the estimate of the mean radiative efficiency of AGN, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Constraint on the quadrupole moment of super-massive black hole candidates from the estimate of the mean radiative efficiency of AGN will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-427364