Determining the spin of two stellar-mass black holes from disk reflection signatures
| dc.creator | Reis, R. C. | |
| dc.creator | Fabian, A. C. | |
| dc.creator | Ross, R. R. | |
| dc.creator | Miller, J. M. | |
| dc.date | 2009-02-10 | |
| dc.date.accessioned | 2026-07-07T12:40:28Z | |
| dc.date.available | 2026-07-07T12:40:28Z | |
| dc.description | We present measurements of the dimensionless spin parameters and inner-disk inclination of two stellar mass black holes. The spin parameter of SWIFT J1753.5-0127 and GRO J1655-40 are estimated by modelling the strong reflection signatures present in their XMM-Newton observations. Using a newly developed, self-consistent reflection model which includes the blackbody radiation of the disk as well as the effect of Comptonisation, blurred with a relativistic line function, we infer the spin parameter of SWIFT J1753.5-0127 to be 0.76 +0.11-0.15. The inclination of this system is estimated at 55+2-7 degrees. For GRO J1655-40 we find that the disk is significantly misaligned to the orbital plane, with an innermost inclination of 30+5-10 degrees. Allowing the inclination to be a free parameter we find a lower limit for the spin of 0.90, this value increases to that of a maximal rotating black hole when the inclination is set to that of the orbital plane of J1655-40. Our technique is independent of the black hole mass and distance, uncertainties in which are among the main contributors to the spin uncertainty in previous works. | |
| dc.description | Accepted for publication in MNRAS, 9 pages, 11 figures | |
| dc.identifier | https://arxiv.org/abs/0902.1745 | |
| dc.identifier | http://arxiv.org/abs/0902.1745 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/219454 | |
| dc.subject | High Energy Astrophysical Phenomena | |
| dc.title | Determining the spin of two stellar-mass black holes from disk reflection signatures | |
| dc.type | text |