Absolute Properties Of The Eclipsing Binary Star Im Persei

Sandberg Lacy, Claud H.; Torres, Guillermo; Fekel, Francis C.; Muterspaugh, Matthew W.; Southworth, John

Abstract

IM Per is a detached A7 eccentric eclipsing binary star. We have obtained extensive measurements of the light curve (28,225 differential magnitude observations) and radial velocity curve (81 spectroscopic observations) which allow us to fit orbits and determine the absolute properties of the components very accurately: masses of 1.7831 ± 0.0094 and 1.7741 ± 0.0097 solar masses, and radii of 2.409 ± 0.018 and 2.366 ± 0.017 solar radii. The orbital period is 2.25422694(15) days and the eccentricity is 0.0473(26). A faint third component was detected in the analysis of the light curves, and also directly observed in the spectra. The observed rate of apsidal motion is consistent with theory (U = 151.4 ± 8.4 year). We determine a distance to the system of 566 ± 46 pc.

Citation

Sandberg Lacy, C. H., Torres, G., Fekel, F. C., Muterspaugh, M. W., & Southworth, J. (2015). Absolute Properties Of The Eclipsing Binary Star Im Persei. Astronomical Journal, 149(1), Article 34. https://doi.org/10.1088/0004-6256/149/1/34

• Journal Article Type: Article
• Acceptance Date: Oct 28, 2014
• Online Publication Date: Jan 5, 2015
• Publication Date: Jan 5, 2015
• Journal: Astronomical Journal
• Print ISSN: 0004-6256
• Publisher: American Astronomical Society
• Peer Reviewed: Peer Reviewed
• Volume: 149
• Issue: 1
• Article Number: 34
• DOI: https://doi.org/10.1088/0004-6256/149/1/34
• Keywords: binaries: eclipsing, binaries: spectroscopic, stars: fundamental parameters, stars: individual (IM Per)
• Publisher URL: https://doi.org/10.1088/0004-6256/149/1/34