Mapping quasi-periodic oscillations from the outbursting intermediate polar GK Persei

Details Mapping quasi-periodic oscillations from the outbursting intermediate polar GK Persei Mapping quasi-periodic oscillations from the outbursting intermediate polar GK Persei

1996-08-22

arxiv.org/abs/astro-ph/9608144v1

Astronomy and Astrophysics

Astrophysics

4 pages, uuencoded postscript (194kb), MNRAS in press, also available at http://star-www.st-and.ac.uk/~mds1/gkper-abs.html

Scientific paper

We present time-resolved spectrophotometry of GK Per taken on the rise to outburst maximum, in which we detect 5000 s QPOs in the optical emission lines. We use this opportunity to provide a kinematically-resolved analysis of the phenomenon. Observations are consistent with reprocessing off blobs of gas orbiting within the inner accretion disc, and evidence is found for the migration of the QPO source towards the compact star over orbital timescales.

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