A photometric study and analysis of AW Ursae Majoris

Details A photometric study and analysis of AW Ursae Majoris A photometric study and analysis of AW Ursae Majoris

Sep 1982

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982apj...260..744h&link_type=abstract

Astrophysical Journal, Part 1, vol. 260, Sept. 15, 1982, p. 744-754.

Astronomy and Astrophysics

Astrophysics

27

Eclipsing Binary Stars, Light Curve, Stellar Color, Stellar Spectrophotometry, Annual Variations, Computer Programs, Main Sequence Stars, Spectrum Analysis, Stellar Mass, Ubv Spectra

Scientific paper

New green and red light curves for the extremely low mass ratio contact binary AW UMa have been observed. These display intrinsic variability around primary minimum occurring with a time scale of a few days. Times of minimum light obtained over three seasons confirm the previously reported period change. A limiting light curve analysis indicates a change in the temperature of the secondary component and in the size of both components. Alternatively, the observations are consistent with a variable hot spot. The implications of these observations are discussed with respect to theories of contact binaries, particularly with regard to the stability of the A-type systems.

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