Observations of the rapid oscillations of EM Cygni

Details Observations of the rapid oscillations of EM Cygni Observations of the rapid oscillations of EM Cygni

Aug 1982

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982pasp...94..672s&link_type=abstract

Astronomical Society of the Pacific, Publications, vol. 94, Aug. 1982, p. 672-677.

Astronomy and Astrophysics

Astronomy

6

Dwarf Novae, Oscillations, Stellar Spectrophotometry, Variable Stars, Periodic Variations, Power Spectra, Stellar Rotation, White Dwarf Stars

Scientific paper

High-speed two-color photometric observations have been made of the dwarf nova EM Cyg and rapid coherent oscillations with periods between 14.6 and 16.5 sec have been found. The minimum period is less than the period of a Keplerian orbit at the surface of a carbon white dwarf. The color temperature of the oscillating component is much higher than that of the constant component of the luminosity. These results suggest that the source of the oscillations is the white dwarf or the inner part of the accretion disk.

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