Мақола

High‐Frequency Quasi‐Periodic Oscillations in the 2000 Outburst of the Galactic Microquasar XTE J1550−564

J. M. MïllerCenter for Space Research and Department of Physics, Massachusetts Institute of Technology, Cambridge, MA 02139-4307R. WijnandsCenter for Space Research and Department of Physics, Massachusetts Institute of Technology, Cambridge, MA 02139-4307J. HomanAstronomical Institute “Anton Pannekoek,” University of Amsterdam, and Center for High Energy Astrophysics, Kruislaan 403, 1098 SJ, Amsterdam, NetherlandsT. BelloniOsservatorio Astronomico di Brera, via Brera 28, Milano I-20121, ItalyD. PooleyCenter for Space Research and Department of Physics, Massachusetts Institute of Technology, Cambridge, MA 02139-4307S. CorbelCEA Paris-SaclayC. KouveliotouNASA/MSFC, SD-50, 320 Sparkman Drive, Huntsville, AL 35812M. van der KlisAstronomical Institute “Anton Pannekoek,” University of Amsterdam, and Center for High Energy Astrophysics, Kruislaan 403, 1098 SJ, Amsterdam, NetherlandsW. H. G. LewinCenter for Space Research and Department of Physics, Massachusetts Institute of Technology, Cambridge, MA 02139-4307

2001en

ABI

Аннотация

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 249-278 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 187 Hz, 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.

Ҳали таржима қилинмаган

Идентификаторлар

DOI: 10.1086/324027

Иқтибослар ва манбалар

2 та иқтибос0 та фойдаланилган манба

Кўрсаткичлар — AkademScholar