Constraints of a pulsation frequency on stellar parameters in the eclipsing spectroscopic binary system V577 Oph

• Type: Article in International Scientific Journal
• Date: 2010

Authors

O.L. Creevey (Author) FCUP; J. Telting (Author) Other; J.A. Belmonte (Author) Other; T. M. Brown (Author) FCUP; G. Handler (Author) Other; T.S. Metcalfe (Author) FCUP; F. Pinheiro (Author) FCUP; S. Sousa (Author) FCUP; D. Terrell (Author) Other; A. Zhou (Author) Other

Journal

Title: Astronomische Nachrichten

Vol. 331 No. 9-10

Pages: 952-955

ISSN: 0004-6337

Publisher: Wiley-Blackwell

Indexing

ISI Web of Science

Scientific classification

FOS: Natural sciences > Physical sciences

Other information

Abstract (EN): We present a preliminary spectroscopic analysis of the binary system V577Oph, observed during the summer of 2007 on the 2.6m NOT telescope on La Palma. We have obtained time series spectroscopic observations, which show clear binary motion as well as radial velocity variations due to pulsation in the primary star. By modelling the radial velocities we determine a full orbital solution of the system, which yields M-A sin(3) i = 1.562 +/- 0.012 M-circle dot and M-B sin(3) i = 1.461 +/- 0.020 M-circle dot. An estimate of inclination from photometry yields a primary mass of similar to 1.6 M-circle dot. Using this derived mass, and the known pulsation frequency we can impose a lower limit of 1 Gyr on the age of the system, and constrain the parameters of the oscillation mode. We show that with further analysis of the spectra (extracting the atmospheric parameters), tighter constraints could be imposed on the age, metallicity and the mode parameters. This work emphasizes the power that a single pulsation frequency can have for constraining stellar parameters in an eclipsing binary system.

Language: English

Type (Professor's evaluation): Scientific