Complex Phase Lag Behaviors of the 0.5 - 10 Hz QPOs in GRS 1915+105

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dc.creatorLin, D.
dc.creatorSmith, I. A.
dc.creatorLiang, E. P.
dc.creatorBöttcher, M.
dc.date2000-10-06
dc.date.accessioned2026-07-07T01:55:51Z
dc.date.available2026-07-07T01:55:51Z
dc.descriptionThrough studying the hard lags between the soft (3.3 - 5.8 keV) and hard (13.0 - 41.0 keV) photons of the 0.5 - 10 Hz QPOs in GRS 1915+105, we have classified them into three types: 0.5 - 2.0 Hz QPOs, 2.0 - 4.5 Hz QPOs, and 4.5 - 10 Hz QPOs. They are closely related to different temporal and spectral states. The first type of QPOs (0.5 - 2 Hz) have positive hard lags at both the QPO fundamental and first harmonic frequencies. These QPOs were observed in the quiescent soft state. The second type of QPOs (2 - 4.5 Hz), which were also detected in the quiescent soft state, have opposite signs of hard lags at the QPO fundamental and first harmonic frequencies. The third type (4.5 - 10 Hz), which showed up in medium soft quiescent/out-burst states, do not have significant higher harmonic peaks. There is a smooth transition between these three types of QPO behaviors. We did not detect 0.5 - 10 Hz QPOs in the very soft state. We discuss some of the implications of these results.
dc.description5 pages, 3 figures, accepted for publication in ApJL
dc.identifierhttps://arxiv.org/abs/astro-ph/0010139
dc.identifierhttp://arxiv.org/abs/astro-ph/0010139
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/1799
dc.subjectAstrophysics
dc.titleComplex Phase Lag Behaviors of the 0.5 - 10 Hz QPOs in GRS 1915+105
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