A precise determination of black hole spin in GRO J1655-40
Résumé
We note that the recently discovered 450 Hz frequency in the X-ray flux of the black hole candidate GRO J1655-40 is in a 3:2 ratio to the previously known 300 Hz frequency of quasi-periodic oscillations (QPO) in the same source. If the origin of high frequency QPOs in black hole systems is a resonance between orbital and epicyclic motion of accreting matter, as suggested previously, the angular momentum of the black hole can be accurately determined, given its mass. We find that the dimensionless angular momentum is in the range 0.2
Domaines
Planète et Univers [physics]
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https://hal.science/hal-04110952
Soumis le : mercredi 7 juin 2023-17:02:42
Dernière modification le : dimanche 17 mars 2024-17:38:24
Archivage à long terme le : vendredi 8 septembre 2023-19:43:31
Dates et versions
Identifiants
- HAL Id : hal-04110952 , version 1
- ARXIV : astro-ph/0105077
- BIBCODE : 2001A&A...374L..19A
- DOI : 10.1051/0004-6361:20010791
Citer
M. A. Abramowicz, W. Kluźniak. A precise determination of black hole spin in GRO J1655-40. Astronomy and Astrophysics - A&A, 2001, 374, pp.L19-L20. ⟨10.1051/0004-6361:20010791⟩. ⟨hal-04110952⟩
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