Ratajczak, M, Pawłaszek, RK, Hełminiak, KG, Konacki, M, Sybilski, P, Kozłowski, SK, Litwicki, M, Smith, AMS, Mikołajczyk, P, Anderson, DR and Hellier, C (2020) Orbital and physical parameters of eclipsing binaries from the ASAS catalogue – XI. CHIRON investigation of long-period binaries*. Monthly Notices of the Royal Astronomical Society. ISSN 0035-8711

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We present the results of a spectroscopic campaign on eclipsing binaries with long orbital period (P = 20 − 75 d) carried out with the CHIRON spectrograph. Physical and orbital solutions for seven systems were derived from the V-band, and I-band ASAS, WASP, and TESS photometry, while radial velocities were calculated from high quality optical spectra using a two-dimensional cross-correlation technique. The atmospheric parameters of the stars have been determined from the separated spectra. Most of our targets are composed of evolved stars (sub-giants or red giants) but two systems show components in different phases of evolution and one possible merger. For four binaries the masses and radii of the components were obtained with precision better than $3%$. These objects provide very valuable information on stellar evolution.

Item Type: Article
Additional Information: This article has been accepted for publication in Monthly Notices of the Royal Astronomical Society © 2020 The Authors. Published by Oxford University Press on behalf of the Royal Astronomical Society. All rights reserved.
Uncontrolled Keywords: eclipsing binaries, stars
Subjects: Q Science > QB Astronomy > QB799 Stars
Divisions: Faculty of Natural Sciences > School of Chemical and Physical Sciences
Depositing User: Symplectic
Date Deposited: 10 Dec 2020 10:21
Last Modified: 23 Feb 2021 15:46
URI: https://eprints.keele.ac.uk/id/eprint/8990

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