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26 April 2024 |
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High Frequency Quasi-Periodic Oscillations in the 2000 Outburst of the Galactic Microquasar XTE J1550-564 | | J. M. Miller
; R. Wijnands
; J. Homan
; T. Belloni
; D. Pooley
; S. Corbel
; C. Kouveliotou
; M. van der Klis
; W. H. G. Lewin
; | | Date: |
22 May 2001 | | Subject: | astro-ph | | Affiliation: | MIT Center for Space Research, Univ. of Amsterdam IAP, Oss. Brera, Universite Paris and CEA Saclay, NASA/MSFC | | Abstract: | We present an analysis of the high frequency timing properties of the April-May 2000 outburst of the black hole candidate and Galactic microquasar XTE J1550-564, measured with the Rossi X-ray Timing Explorer. The rapid X-ray variability we measure is consistent with the source being in either the ``very high’’ or ``intermediate’’ black hole state. Strong (5-8% rms) quasi-periodic oscillations (QPOs) are found between 249-276 Hz; this represents the first detection of the same high frequency QPO in subsequent outbursts of a transient black hole candidate. We also present evidence for lower-frequency QPOs at approximately 188 Hz (3.5 sigma, single trial), also reported previously and likely present simultaneously with the higher-frequency QPOs. We discuss these findings within the context of the 1998 outburst of XTE J1550-564, and comment on implications for models of QPOs, accretion flows, and black hole spin. | | Source: | arXiv, astro-ph/0105371 | | Services: | Forum | Review | PDF | Favorites | |
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