Discovery of a 34 Hz Quasi-Periodic Oscillation in the X-ray emission of GRS 1915+105
Mar 20, 20135 pages
Published in:
- Mon.Not.Roy.Astron.Soc. 432 (2013) 19
e-Print:
- 1303.4934 [astro-ph.HE]
DOI:
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Abstract: (arXiv)
We report the discovery in the Rossi X-Ray Timing Explorer data of GRS 1915+105 of a second quasi-periodic oscillation at 34 Hz, simultaneous with that observed at 68 Hz in the same observation. The data corresponded to those observations from 2003 where the 68-Hz oscillation was very strong. The significance of the detection is 4.2 sigma. These observations correspond to a very specific position in the colour-colour diagram for GRS 1915+105, corresponding to a harder spectrum compared to those where a 41 Hz oscillation was discovered. We discuss the possible implications of the new pair of frequencies comparing them with the existing theoretical models.Note:
- 5 pages, 3 figures, Accepted for publication in MNRAS
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