Discovery of New Quasi-periodic Oscillations in the X-Ray Transient Source V0332+53 | Zendy

Jin Qu | Zendy; S Zhang | Zendy; L. M. Song | Zendy; M. Falanga | Zendy

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Discovery of New Quasi-periodic Oscillations in the X-Ray Transient Source V0332+53

Author(s) -

Jin Qu,

S Zhang,

L. M. Song,

M. Falanga

Publication year - 2005

Publication title -

the astrophysical journal

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 2.376

H-Index - 489

eISSN - 1538-4357

pISSN - 0004-637X

DOI - 10.1086/444350

Subject(s) - physics , astrophysics , oscillation (cell signaling) , context (archaeology) , flux (metallurgy) , transient (computer programming) , quasi periodic , centroid , paleontology , genetics , materials science , computer science , metallurgy , biology , operating system , artificial intelligence

We report the discovery of a new quasi-period oscillation (QPO) at 0.22 Hz,centered on the source spin frequency of the high mass X-ray binary systemV~0332+53 when the source was observed during its November 2004/March 2005outburst by {\em RXTE}. Besides this new QPO, we also detected the known 0.05Hz QPO. Both the 0.22 and 0.05 Hz QPOs stand out clearly at a mid-flux level ofthe outburst within January 15--19 2005, and later at an even lower flux levelas the width of 0.22 Hz QPO drops. No evolution of the centroid frequency withthe flux is seen in either QPO. The rms value below 10 keV is around 4--6% forboth QPOs and decreases at higher energies. We discuss our results in thecontext of current QPO models.Comment: 5 figures, 12 pages. AASTex preprint style. (In 2005, ApJ Let., 629, L33

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