Nandi, Anuj ; Manickam, Sivakumar G. ; Rao, A. R. ; Chakrabarti, Sandip K. (2001) On the source of quasi-periodic oscillations of the black hole candidate GRS 1915+105: some new observations and their interpretation Monthly Notices of the Royal Astronomical Society, 324 (1). pp. 267-272. ISSN 0035-8711
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Official URL: http://onlinelibrary.wiley.com/doi/10.1046/j.1365-...
Related URL: http://dx.doi.org/10.1046/j.1365-8711.2001.04339.x
Abstract
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.
| Item Type: | Article |
|---|---|
| Source: | Copyright of this article belongs to John Wiley and Sons. |
| Keywords: | Accretion; Accretion Discs; Black Hole Physics; Stars: Individual: GRS 1915+105; Stars: Oscillations |
| ID Code: | 85594 |
| Deposited On: | 03 Mar 2012 14:49 |
| Last Modified: | 03 Mar 2012 14:49 |
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