Fulltext

An eclipsing post-common-envelope binary in the field of the Kepler mission

Almenara, J. M. ; Alonso, R. ; Rabus, M. ; Lázaro, C. ; Arévalo, M. J. ; Belmonte, J. A. ; Deeg, H. J. ; Brown, T. M. ; Vázquez Ramió, H.

In: Monthly Notices of the Royal Astronomical Society, 2012, vol. 420, no. 4, p. 3017-3025

Ajouter à la liste personnelle
    Titre
    • An eclipsing post-common-envelope binary in the field of the Kepler mission
    Auteur
    • Almenara, J. M.. Instituto de Astrofísica de Canarias, C/Vía Láctea S/N, E-38200 La Laguna, Spain
    • Alonso, R.. Observatoire de Genève, Université de Genève, 51 Ch. des Maillettes, 1290 Sauverny, Switzerland
    • Rabus, M.. Instituto de Astrofísica de Canarias, C/Vía Láctea S/N, E-38200 La Laguna, Spain
    • Lázaro, C.. Instituto de Astrofísica de Canarias, C/Vía Láctea S/N, E-38200 La Laguna, Spain
    • Arévalo, M. J.. Instituto de Astrofísica de Canarias, C/Vía Láctea S/N, E-38200 La Laguna, Spain
    • Belmonte, J. A.. Instituto de Astrofísica de Canarias, C/Vía Láctea S/N, E-38200 La Laguna, Spain
    • Deeg, H. J.. Instituto de Astrofísica de Canarias, C/Vía Láctea S/N, E-38200 La Laguna, Spain
    • Brown, T. M.. Las Cumbres Observatory Global Telescope, Goleta, CA 93117, USA
    • Vázquez Ramió, H.. Instituto de Astrofísica de Canarias, C/Vía Láctea S/N, E-38200 La Laguna, Spain
    Type de document
    • Postprint
    Langue
    • Anglais
    Publié dans
    • Monthly Notices of the Royal Astronomical Society, 2012, vol. 420, no. 4, p. 3017-3025. Blackwell Publishing Ltd
    Autre version électronique
    Identifiant OAI-PMH
    • oai:doc.rero.ch:300161
    Summary
    We present a new eclipsing post-common-envelope binary, identified inside the Kepler field prior to the launch of the spacecraft. Multifilter photometry and radial velocity data are analysed with an eclipsing-binary modelling code to determine the physical parameters of the binary. Spectra of the system within the primary eclipse and uneclipsed allow us to identify the spectral characteristics of the primary and secondary components. The primary component of the binary is a DA white dwarf, with M≃ 0.61 M⊙, log g≃ 7.95 and Teff≃ 20 500 K. The detection of two flares and the emission signatures displayed in the spectra show that the secondary component of the system is chromospherically active and is classified as an active M4 main-sequence star. Its mass, radius and temperature are estimated as M≃ 0.39 M⊙, R≃ 0.37 R⊙ and Teff≃ 3200 K. The ephemeris of the system is HJD = 245 3590.436 126(10) + 0.350 468 722(6) ×E. This binary is a new post-common-envelope binary (PCEB), with physical parameters within the range found in other systems of this small group of evolved binaries