2012/10/09 by M. A. Abramowicz, F. K. Liu · 2 citations
Physics and Astronomy · #Astrophysical Phenomena and Observations #Astrophysics and Cosmic Phenomena #Black hole (networking) #Flux (metallurgy) #Intermediate-mass black hole #Oscillation (cell signaling) #Relativity and Gravitational Theory #Resonance (particle physics) #Spin-flip #Stellar black hole #Supermassive black hole #astro-ph.HE #gr-qc
paper · pdf · doi:10.1051/0004-6361/201220254
Accepted by Astronomy and Astrophysics
arxiv created 2012/10/09 · openalex publication_date 2012/10/11 · arxiv updated 2015/06/11 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
A dormant Swift source J 164449.3+573451 (Sw 164449+57) recently experienced a powerful outburst, caused most probably by a tidal disruption of a star by the supermassive black hole at the center of the source. During the outburst, a quasi periodic oscillation (QPO) was detected in the observed X-ray flux from Sw 164449+57. We show that if the observed QPO belongs to a “3:2 twin peak QPO” (with the second frequency not observed), the mass of the black hole in Sw 164449+57 is rather low, M ~ 105 M⊙, and the source belongs to a class of intermediate mass black holes. The low mass of the source has been pointed out previously by several authors.