Constraints of a pulsation frequency on stellar parameters in the eclipsing spectroscopic binary system V577 Oph
| Autor: | Juan Antonio Belmonte, Dirk Terrell, Orlagh Creevey, Timothy M. Brown, A. Zhou, Travis S. Metcalfe, Sérgio F. Sousa, Gerald Handler, J. H. Telting, F. Pinheiro |
|---|---|
| Přispěvatelé: | Instituto de Astrofísica de Canarias (IAC), Nordic Optical Telescope, LCOGT, Institut für Astronomie, Universität Wien (IfA), High Altitude Observatory, National Center for Atmospheric Research, Centro de Física Computacional, Universidade de Coimbra, Laboratoire d'études spatiales et d'instrumentation en astrophysique (LESIA), Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS), Pôle Astronomie du LESIA, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris, Centro de Astrofisica da Universidade do Porto (CAUP), Department of Space Studies, Southwest Research Institute, National Astronomical Observatoires-CAS |
| Rok vydání: | 2010 |
| Předmět: |
Physics
Astrophysics::High Energy Astrophysical Phenomena Metallicity Mode (statistics) FOS: Physical sciences Binary number Astronomy and Astrophysics Astrophysics::Cosmology and Extragalactic Astrophysics Astrophysics Spectral line law.invention Photometry (optics) Telescope Radial velocity Astrophysics - Solar and Stellar Astrophysics Space and Planetary Science law Astrophysics::Solar and Stellar Astrophysics Astrophysics::Earth and Planetary Astrophysics Binary system [PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph] Solar and Stellar Astrophysics (astro-ph.SR) Astrophysics::Galaxy Astrophysics |
| Zdroj: | Astronomical Notes / Astronomische Nachrichten Astronomical Notes / Astronomische Nachrichten, 2010, 331, pp.952. ⟨10.1002/asna.201011434⟩ |
| ISSN: | 0004-6337 1521-3994 |
| Popis: | 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_solar and M_B sin^3 i = 1.461 +/- 0.020 M_solar. An estimate of inclination from photometry yields a primary mass of 1.6 M_solar. 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. Accepted by AN |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Plný text