2000/12/29 by Anuj Nandi, A. Nandi, Sivakumar G. Manickam +3 · 23 citations
Physics and Astronomy · #Accretion (finance) #Accretion disc #Astronomy #Astrophysical Phenomena and Observations #Astrophysics #Black hole (networking) #Gamma-ray bursts and supernovae #Interpretation (philosophy) #Light curve #Oscillation (cell signaling) #Physics #Pulsars and Gravitational Waves Research #astro-ph
paper · pdf · doi:10.1046/j.1365-8711.2001.04339.x
published in Monthly Notices of the Royal Astronomical Society 324(1), 267-272 (Oxford University Press) · MNRAS style. MNRAS (To appear)
arxiv created 2000/12/29 · openalex publication_date 2001/06/01 · arxiv updated 2015/06/24 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
A few classes of the light curve of the black hole candidate GRS 1915+105 have been analysed in detail. We discover that unlike the previous findings, quasi-periodic oscillations (QPOs) occasionally occur even in the so-called ‘On’ or softer states. Such findings may require a revision of the accretion/wind scenario of the black hole candidates. We conjecture that considerable winds that are produced in ‘Off’ states cool down as a result of Comptonization and fall back to the disc, creating an excess accretion rate and producing the so-called ‘On’ state. After the drainage of the excess matter, the disc goes back to the ‘Off’ state. Our findings strengthen the shock oscillation model for QPOs.