The evolutionary status of chemically peculiar eclipsing binary star DV Boo

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KAHRAMAN F., Alicvus F.

RESEARCH IN ASTRONOMY AND ASTROPHYSICS, vol.20, no.9, 2020 (SCI-Expanded) identifier

  • Publication Type: Article / Article
  • Volume: 20 Issue: 9
  • Publication Date: 2020
  • Doi Number: 10.1088/1674-4527/20/9/150
  • Journal Name: RESEARCH IN ASTRONOMY AND ASTROPHYSICS
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Aerospace Database, INSPEC
  • Keywords: techniques, photometric, spectroscopic, stars, variables, binaries, eclipsing, fundamental parameters, stars, individual, DV Boo, SPECTROSCOPIC SURVEY, PHYSICAL PARAMETERS, COMPONENT SPECTRA, CLOSE BINARIES, AM STARS, SYSTEMS, I., ELEMENTS, CATALOG, SEARCH
  • Çanakkale Onsekiz Mart University Affiliated: Yes

Abstract

Eclipsing binary systems are unique stellar objects to examine and understand stellar evolution and formation. Thanks to these systems, the fundamental stellar parameters (mass, radius) can be obtained very precisely. The existence of metallic-line (Am) stars in binaries is noticeably common. However, the known number of Am stars in eclipsing binaries is less. The Am stars in eclipsing binaries are extremely useful to deeply investigate the properties of Am stars, as eclipsing binaries are the only tool to directly derive the fundamental stellar parameters. Additionally, the atmospheric parameters and metallicities of such binary components could be obtained by a detailed spectroscopic study. Therefore, in this study, we present a comprehensive photometric and spectroscopic analysis of the eclipsing binary system DV Boo which has a possible Am component. The fundamental stellar parameters were determined by the analysis of radial velocity and photometric light curves. The atmospheric parameters of both binary components of DV Boo were derived considering the disentangled spectra. The chemical abundance analysis was carried out as well. As a result, we showed that the primary component exhibits a typical Am star chemical abundance distribution. The fundamental stellar parameters of the binary components were also obtained with an accuracy of <1% for masses and <3% for radii. The evolutionary status of DV Boo was examined utilizing the precisely obtained stellar parameters. The age of the system was found to be 1.00 +/- 0.08 Gyr.