The Discovery and Initial Characterization of a New Eclipsing Binary with Peculiar Properties

Details The Discovery and Initial Characterization of a New Eclipsing Binary with Peculiar Properties The Discovery and Initial Characterization of a New Eclipsing Binary with Peculiar Properties

May 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006sass...25..173m&link_type=abstract

The Society for Astronomical Sciences 25th Annual Symposium on Telescope Science. Held May 23-25, 2006, at Big Bear, CA. Publish

Astronomy and Astrophysics

Astronomy

Scientific paper

During the course of a general spectroscopic survey at the Dark Sky Observatory (Appalachian State University), a new eclipsing binary star, HD5501, was found. Photometric observations in the BVRI bands for nearly a year give a period of 7.53 days with a primary eclipse of 0.45 magnitude and a secondary of 0.3 magnitude. The system is constantly varying, suggesting an ellipsoidal variable with the stars in or near contact, perhaps with one or both Roche lobes filled. Spectroscopic examination (1.8A/pixel) of the system at different phases show the Balmer lines (beta, gamma and delta) along with the important shell lines of FeII between 4900 and 5200 Angstroms are stronger in eclipse than at quadrature. This suggests differing orientation of gas around the system. Higher resolution spectra (0.9A/pixel) shows slightly broader metallic lines in quadrature than in eclipse. This suggests the system is an SB2. A spectrum at H-alpha shows a classic wind signature, again suggesting the presence of mass transfer in the system.

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