CONSTRAINING THE QUADRUPOLE MOMENT OF STELLAR-MASS BLACK HOLE CANDIDATES WITH THE CONTINUUM FITTING METHOD
CONSTRAINING THE QUADRUPOLE MOMENT OF STELLAR-MASS BLACK HOLE CANDIDATES WITH THE CONTINUUM FITTING METHOD
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DOI：
10.1088/0004-637x/731/2/121
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发表时间：
2010-12
期刊：
影响因子：
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通讯作者：
C. Bambi;E. Barausse
中科院分区：
文献类型：
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作者：
C. Bambi;E. Barausse
广义相对论中的黑洞被称为克尔黑洞，其特征仅在于两个参数，质量M和自旋J。例如，四极矩是Q = −J2/M，这意味着测量黑洞候选者的M，J和Q将允许人们测试这些物体是否真的是广义相对论所描述的黑洞。虽然未来的引力波实验将能够测试这些对象的克尔性质具有非常高的精度，在本文中，我们表明，它是可能的恒星质量的黑洞候选人的四极矩的限制，通过使用目前可用的X射线数据的热谱的吸积盘。
Black holes in general relativity are known as Kerr black holes and are characterized solely by two parameters, the mass M and the spin J. All the higher multipole moments of the gravitational field are functions of these two parameters. For instance, the quadrupole moment is Q = −J2/M, which implies that a measurement of M, J, and Q for black hole candidates would allow one to test whether these objects are really black holes as described by general relativity. While future gravitational-wave experiments will be able to test the Kerr nature of these objects with very high accuracy, in this paper we show that it is possible to put constraints on the quadrupole moment of stellar-mass black hole candidates by using presently available X-ray data of the thermal spectrum of their accretion disk.