Stroemgren U photometry of CH Cygni

Details Stroemgren U photometry of CH Cygni Stroemgren U photometry of CH Cygni

Nov 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993pasp..105.1232h&link_type=abstract

Astronomical Society of the Pacific, Publications (ISSN 0004-6280), vol. 105, no. 693, p. 1232-1237

Astronomy and Astrophysics

Astronomy

10

Astronomical Photometry, Light Curve, Power Spectra, Stellar Models, Symbiotic Stars, Accretion Disks, Cataclysmic Variables, Charge Coupled Devices, Spectrum Analysis, Stellar Magnitude, White Dwarf Stars

Scientific paper

Power-spectrum analysis of Stroemgren u-band light curves of CH Cygni reveals a period of approximately 2600 s in length. The period was detected on two nights separated by approximately six months, in early May and late October of 1992. A tentative model is presented which is consistent with the observations but not entirely constrained by them. The model is similar to the structure of a DQ Herculis-type cataclysmic variable. Features in the October light curve also suggest that the accretion process in CH Cyg is subject to occasional disruption. Further observation is required to more fully understand the nature and origin of the approximately 2600-s period in CH Cyg.

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