Strömgren u Photometry of CH Cygni

Power-spectrum analysis of Strömgren u-band light curves of CH Cygni reveals a period of ≈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...

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Bibliographic Details
Published inPublications of the Astronomical Society of the Pacific Vol. 105; no. 693; pp. 1232 - 1237
Main Author Hoard, D. W.
Format Journal Article
LanguageEnglish
Published Chicago, IL American Institute of Physics 01.11.1993
University of Chicago Press
Subjects
Acoustic spectra
Astronomical photometry
Astronomy
Binary and multiple stars
Cataclysmic binaries (novae, dwarf novae, recurrent novae, and nova-like objects). Symbiotic stars
Curtains
Earth, ocean, space
Exact sciences and technology
Light curves
Luminosity
Magnetic fields
Red giants
Rotation
Stars
Symbiotic stars
White dwarfs
Charge coupled devices
Symbiotic stars
Power spectra
Star accretion
Photometry
Light curves
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ISSN0004-6280
1538-3873
DOI10.1086/133300

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Summary:Power-spectrum analysis of Strömgren u-band light curves of CH Cygni reveals a period of ≈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 ≈2600-s period in CH Cyg.
ISSN:0004-6280
1538-3873
DOI:10.1086/133300