Optical, UV, and EUV Oscillations of SS Cygni in Outburst

Details Optical, UV, and EUV Oscillations of SS Cygni in Outburst Optical, UV, and EUV Oscillations of SS Cygni in Outburst

2004-01-23

arxiv.org/abs/astro-ph/0401484v1

Astronomy and Astrophysics

Astrophysics

8 pages including 7 encapsulated postscript figures; LaTeX format, uses aipproc.cls, aip-8d.clo, and aipxfm.sty; to appear in

Scientific paper

10.1063/1.1781048

I provide a review of observations in the optical, UV (HST), and EUV (EUVE and Chandra LETG) of the rapid periodic oscillations of nonmagnetic, disk-accreting, high mass-accretion rate cataclysmic variables (CVs), with particular emphasis on the dwarf nova SS Cyg in outburst. In addition, I drawn attention to a correlation, valid over nearly six orders of magnitude in frequency, between the frequencies of the quasi-periodic oscillations (QPOs) of white dwarf, neutron star, and black hole binaries. This correlation identifies the high frequency quasi-coherent oscillations (so-called ``dwarf nova oscillations'') of CVs with the kilohertz QPOs of low mass X-ray binaries (LMXBs), and the low frequency and low coherence QPOs of CVs with the horizontal branch oscillations (or the broad noise component identified as such) of LMXBs. Assuming that the same mechanisms produce the QPOs of white dwarf, neutron star, and black hole binaries, this correlation has important implications for QPO models.

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