X-ray spectral components in the hard state of GRS 1915+105: origin of the 0.5 - 10 Hz QPO

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dc.creatorRao, A. R.
dc.creatorNaik, S.
dc.creatorVadawale, S. V.
dc.creatorChakrabarti, S. K.
dc.date2000-07-26
dc.date.accessioned2026-07-07T01:54:34Z
dc.date.available2026-07-07T01:54:34Z
dc.descriptionWe investigate the origin of the ubiquitous 0.5 - 10 Hz QPO in the Galactic microquasar GRS 1915+105. Using the archival X-ray data from RXTE, we make a wide band X-ray spectral fitting to the source during a low-hard state observed in 1999 June. We resolve the X-ray spectra into three components, namely a multi-color disk component, a Comptonised component and a power-law at higher energies. This spectral description is favored compared to other normally used spectra like a cut-off power law, hard components with reflection etc. We find that the 0.5 - 10 Hz QPO is predominantly due to variations in the Comptonised component. We use this result to constrain the location of the various spectral components in the source.
dc.description5 pages, 4 figures. Accepted for publication in A&A Letters
dc.identifierhttps://arxiv.org/abs/astro-ph/0007405
dc.identifierhttp://arxiv.org/abs/astro-ph/0007405
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/1396
dc.subjectAstrophysics
dc.titleX-ray spectral components in the hard state of GRS 1915+105: origin of the 0.5 - 10 Hz QPO
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