Spin 3/5 Black Hole in GRO J1655-40?
| dc.creator | Gruzinov, Andrei | |
| dc.date | 1999-10-19 | |
| dc.date | 1999-10-28 | |
| dc.date.accessioned | 2026-07-07T02:33:56Z | |
| dc.date.available | 2026-07-07T02:33:56Z | |
| dc.description | When a bright spot in a high-inclination disk orbits a black hole, its light is periodically lensed and Doppler shifted. If the spots occupy a narrow range of radii, a quasi-periodic oscillation (QPO) will result. I calculate the QPO frequency assuming that the spots appear near r_max - the radius of the maximal proper radiation flux from the disk. The calculated frequency depends on the black hole mass and spin. For the microquasar GRO J1655-40, the black hole mass is known and a 300 Hz QPO was observed. The inferred black hole spin is about 60% of the maximal. The orbit precession frequency at r_max is 20Hz, this QPO was also observed in GRO J1655-40. An approximate formula for r_max is given. | |
| dc.description | 4 pages, submitted to ApJ | |
| dc.identifier | https://arxiv.org/abs/astro-ph/9910335 | |
| dc.identifier | http://arxiv.org/abs/astro-ph/9910335 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/15043 | |
| dc.subject | Astrophysics | |
| dc.title | Spin 3/5 Black Hole in GRO J1655-40? | |
| dc.type | text |