Absolute Dimensions of the Metallic-line Eclipsing Binary V501 Monocerotis

Torres, G. and Lacy, C. H. S. and Pavlovski, Krešimir and Fekel, F.C. and Muterspaugh, M.W. (2015) Absolute Dimensions of the Metallic-line Eclipsing Binary V501 Monocerotis. Astronomical Journal, 150 (5). pp. 154-1. ISSN 0004-6256

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Abstract

We report extensive high-resolution spectroscopic observations and V-band differential photometry of the slightly eccentric 7.02-day detached eclipsing binary V501 Mon (A6m+F0), which we use to determine its absolute dimensions to high precision (0.3% for the masses and 1.8% for the radii, or better). The absolute masses, radii, and temperatures are M(A) = 1.6455 +/- 0.0043 M(Sun), R(A) = 1.888 +/- 0.029 R(Sun), and T(A) = 7510 +/- 100 K for the primary, and M(B) = 1.4588 +/- 0.0025 M(Sun), R(B) = 1.592 +/- 0.028 R(Sun), and T(B) = 7000 +/- 90 K for the secondary. Apsidal motion has been detected, to which General Relativity contributes approximately 70%. The primary star is found to be a metallic-line A star. A detailed chemical analysis of the disentangled spectra yields abundances for more than a dozen elements in each star. Based on the secondary, the system metallicity is near solar: [Fe/H] = +0.01 +/- 0.06. Lithium is detected in the secondary but not in the primary. A comparison with current stellar evolution models shows a good match to the measured properties at an age of about 1.1 Gyr.

Item Type: Article
Keywords: binaries: eclipsing; stars: evolution; stars: fundamental parameters; stars: individual (V501 Mon); techniques: photometric; techniques: spectroscopic
Date: 30 October 2015
Subjects: NATURAL SCIENCES > Physics > Astronomy and Astrophysics
Additional Information: © 2015. The American Astronomical Society. Received 2015 August 21; accepted 2015 September 24; published 2015 October 21.
Divisions: Faculty of Science > Department of Physics
Project code: IP-09-2014-8656
Funders: Ministarstvo znanosti, obrazovanja i športa
Publisher: IOP Publishing
Depositing User: Krešimir Pavlovski
Date Deposited: 26 Mar 2017 19:22
Last Modified: 26 Mar 2017 19:23
URI: http://digre.pmf.unizg.hr/id/eprint/5477

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