On the source of QPO of the black hole candidate GRS1915+105: some new observations and their interpretation

Details On the source of QPO of the black hole candidate GRS1915+105: some new observations and their interpretation On the source of QPO of the black hole candidate GRS1915+105: some new observations and their interpretation

2000-12-29

arxiv.org/abs/astro-ph/0012527v1

Mon.Not.Roy.Astron.Soc. 324 (2001) 267

Astronomy and Astrophysics

Astrophysics

MNRAS style. MNRAS (To appear)

Scientific paper

A few classes of the light curve of the black hole candidate GRS 1915+105 have been analyzed in detail. We discover that unlike the previous findings, 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 which is produced in `Off' states, cool down due to Comptonization, and falls back to the disk and creating an excess accretion rate to produce the so-called `On' state. After the drainage of the excess matter, the disk goes back to the `Off' state. Our findings strengthen the shock oscillation model for QPOs.

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