Absolute Dimensions of the Metallic-line Eclipsing Binary V501 Monocerotis

Scientific paper - Original scientific paper

• Author: G. Torres
• Author: C. H. S. Lacy
• Author: Krešimir Pavlovski
• Author: F.C. Fekel
• Author: M.W. Muterspaugh
• Author's institution: University of Zagreb; Faculty of Science; (Department of Physics)
• Scientific / art field, discipline and subdiscipline: NATURAL SCIENCES; Physics; Astronomy and Astrophysics

Abstract (english)

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.

• Keywords (english): binaries: eclipsing; stars: evolution; stars: fundamental parameters; stars: individual (V501 Mon); techniques: photometric; techniques: spectroscopic
• Language: english
• Publication type: Scientific paper - Original scientific paper
• Publication status: Published
• Peer review: Peer review - international
• Publication version: Published version
• Journal title: Astronomical Journal
• Numbering: vol. 150, no. 5, 154
• p-ISSN: 0004-6256
• e-ISSN: 1538-3881
• DOI: https://doi.org/10.1088/0004-6256/150/5/154
• URN:NBN: urn:nbn:hr:217:921431
• Publication: 2015
• Project: Number: IP-2014-09-8656; Title (croatian): Zvijezde i prašina: struktura, sastav i interakcija; Acronym: STARDUST; Leader: Krešimir Pavlovski; Jurisdiction: Croatia; Funding stream: IP
• Document URL: https://iopscience.iop.org/article/10.1088/0004-6256/150/5/154
• Type of resource: Text
• Access conditions: Open access
• Public note: © 2015. The American Astronomical Society. Received 2015 August 21; accepted 2015 September 24; published 2015 October 21.
• Created on: 2020-01-19 18:37:51