A new eclipsing binary system with a pulsating component detected by CoRoT
- Autor(en)
- Kirill Sokolovsky, Carla Maceroni, Markus Hareter, Cilia Damiani Badache, Lola Balaguer-Nunez, Ignasi Ribas
- Abstrakt
We report the discovery of CoRoT 102980178 (_ = 06h50m12.s10, _ = ?02_41021.008, J2000) an Algol-type eclipsing binary system with a pulsating component (oEA). It was identified using a publicly available 55 day long monochromatic lightcurve from the CoRoT initial run dataset (exoplanet field). Eleven consecutive 1.m26 deep total primary and the equal number of 0.m25 deep secondary eclipses (at phase 0.50) were observed. The following light elements for the primary eclipse were derived: HJDMinI = 2454139.0680+5.d0548×E. The lightcurve modelling leads to a semidetached configuration with the photometric mass ratio q = 0.2 and orbital inclination i = 85_. The out-of-eclipse lightcurve shows ellipsoidal variability and positive O'Connell effect as well as clear 0.m01 pulsations with the dominating frequency of 2.75 c/d. The pulsations disappear during the primary eclipses, which indicates the primary (more massive) component to be the pulsating star. Careful frequency analysis reveals the second independent pulsation frequency of 0.21 c/d and numerous combinations of these frequencies with the binary orbital frequency and its harmonics. On the basis of the CoRoT lightcurve and ground based multicolor photometry, we favor classification of the pulsating component as a Doradus
- Organisation(en)
- Institut für Astrophysik
- Externe Organisation(en)
- Max-Planck-Institut für Radioastronomie, INAF - Osservatorio Astronomico di Roma, Universitat Autònoma de Barcelona
- Journal
- Communications in Asteroseismology
- Band
- 161
- Seiten
- 55-70
- Anzahl der Seiten
- 16
- ISSN
- 1021-2043
- Publikationsdatum
- 2010
- Peer-reviewed
- Ja
- ÖFOS 2012
- 103003 Astronomie
- Link zum Portal
- https://ucrisportal.univie.ac.at/de/publications/157e78cb-6269-4a2a-bf01-969ff6d4b57c