Spin Measurements of Black Holes Thomas Dauser

Relativistic effects close to the black hole
β[rg]
40
20
0
-20
-40
-60
-40
-20
α[rg]
0
-0.3 -0.2 -0.1 0.0 0.1 0.2 0.5 1.0
Redshift z
20
40
1.4 1.3 1.2 1.1
E/Ee
1 0.9 0.8 0.6 0.4 -10
0
10
(Dauser et al., 2010)
Rotating Black Hole: Metric depends on M (mass) and a (spin)
→ special relativistic beaming, light bending, and gravitational redshift
(Kerr, 1963; Cunningham, 1975; Fabian et al., 1989; Laor, 1991; Dovčiak et al., 2004; Dauser et al., 2010)
60
10
0
-10
0
10
10
0