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http://hdl.handle.net/2445/99492
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DC Field | Value | Language |
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dc.contributor.author | Belloni, T. | - |
dc.contributor.author | Soleri, P. | - |
dc.contributor.author | Casella, P. | - |
dc.contributor.author | Méndez, M. | - |
dc.contributor.author | Migliari, Simone | - |
dc.date.accessioned | 2016-06-13T15:03:24Z | - |
dc.date.available | 2016-06-13T15:03:24Z | - |
dc.date.issued | 2006-06 | - |
dc.identifier.issn | 0035-8711 | - |
dc.identifier.uri | http://hdl.handle.net/2445/99492 | - |
dc.description.abstract | We report the results of a systematic timing analysis of RXTE observations of GRS 1915+105 when the source was in its variability class θ, characterized by alternating soft and hard states on a time-scale of a few hundred seconds. The aim was to examine the high-frequency part of the power spectrum in order to confirm the hectohertz quasi-periodic oscillations (QPO) previously reported from observations from mixed variability behaviours. During the hard intervals (corresponding to state C in the classification of Belloni et al.), we find a significant QPO at a frequency of ~170 Hz, although much broader (Q~2) than previously reported. No other significant peak is observed at frequencies >30 Hz. A time-resolved spectral analysis of selected observations shows that the hard intervals from class θ show a stronger and steeper (Γ = 2.8-3.0) power-law component than hard intervals from other classes. We discuss these results in the framework of hectohertz QPOs reported from GRS 1915+105 and other black hole binaries. | - |
dc.format.extent | 6 p. | - |
dc.format.mimetype | application/pdf | - |
dc.language.iso | eng | - |
dc.publisher | Royal Astronomical Society | - |
dc.relation.isformatof | Reproducció del document publicat a: http://dx.doi.org/10.1111/j.1365-2966.2006.10286.x | - |
dc.relation.ispartof | Monthly Notices of the Royal Astronomical Society, 2006, vol. 369, num. 1, p. 305-310 | - |
dc.relation.uri | http://dx.doi.org/10.1111/j.1365-2966.2006.10286.x | - |
dc.rights | (c) Belloni, T. et al., 2006 | - |
dc.source | Articles publicats en revistes (Física Quàntica i Astrofísica) | - |
dc.subject.classification | Observacions astronòmiques | - |
dc.subject.classification | Astronomia de raigs X | - |
dc.subject.classification | Oscil·lacions | - |
dc.subject.other | Astronomical observations | - |
dc.subject.other | X-ray astronomy | - |
dc.subject.other | Oscillations | - |
dc.title | High-frequency quasi-periodic oscillations from GRS 1915+105 in its C state | - |
dc.type | info:eu-repo/semantics/article | - |
dc.type | info:eu-repo/semantics/publishedVersion | - |
dc.identifier.idgrec | 634042 | - |
dc.date.updated | 2016-06-13T15:03:29Z | - |
dc.rights.accessRights | info:eu-repo/semantics/openAccess | - |
Appears in Collections: | Articles publicats en revistes (Física Quàntica i Astrofísica) |
Files in This Item:
File | Description | Size | Format | |
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634042.pdf | 2.7 MB | Adobe PDF | View/Open |
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