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| DOI | 10.1088/0004-6256/142/4/106 | ||||
| Año | 2011 | ||||
| Tipo | artículo de investigación |
Citas Totales
Autores Afiliación Chile
Instituciones Chile
% Participación
Internacional
Autores
Afiliación Extranjera
Instituciones
Extranjeras
We present a multi-epoch time-resolved high-resolution optical spectroscopy study of the short-period (P(orb) = 11.2 hr) eclipsing M0V+M5V RS CVn binary V405 Andromeda. By means of indirect imaging techniques, namely Doppler imaging, we study the surface activity features of the M0V component of the system. A modified version of a Doppler imaging code, which takes into account the tidal distortion of the surface of the star, is applied to the multi-epoch data set in order to provide indirect images of the stellar surface. The multi-epoch surface brightness distributions show a low intensity "belt" of spots at latitudes +/- 40 degrees and a noticeable absence of high latitude features or polar spots on the primary star of V405 Andromeda. They also reveal slow evolution of the spot distribution over similar to 4 yr. An entropy landscape procedure is used in order to find the set of binary parameters that lead to the smoothest surface brightness distributions. As a result, we find M(1) = 0.51 +/- 0.03M(circle dot), M(2) = 0.21 +/- 0.01M(circle dot), R(1) = 0.71 +/- 0.01 R(circle dot), and an inclination i = 65 degrees +/- 1 degrees. The resulting systemic velocity is distinct for different epochs, raising the possibility of the existence of a third body in the system.
| Ord. | Autor | Género | Institución - País |
|---|---|---|---|
| 1 | Ribeiro, Tiago | Hombre |
SOAR Telescope - Chile
UNIV FED SANTA CATARINA - Brasil Universidade Federal de Santa Catarina - Brasil |
| 2 | Baptista, R. | - |
UNIV FED SANTA CATARINA - Brasil
Universidade Federal de Santa Catarina - Brasil |
| 3 | Kafka, Stella | Mujer |
Carnegie Inst Washington - Estados Unidos
Carnegie Institution of Washington - Estados Unidos |
| Agradecimiento |
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| We are grateful to an anonymous referee for several useful comments and suggestions which helped to improve the presentation of our results. We thank to Eder Martioli (CFHT) for sharing the NORMSPEC code used for the spectrum continuum fit with us. T.R. acknowledges financial support from CAPES/CNPq through a PhD scholarship. R.B. acknowledges support from CNPq through grant 302.443/2008-8. S.K. acknowledges support by NASAs NAI Program and the visiting professor grant (APV) 453245/2010-2 from CNPq/Brazil. This work makes extensive use of the MINERVA cluster (http://www.minerva.ufsc.br) from the physics department at UFSC, managed by William Schoenell who kindly assisted our simulations. This work is based on spectral data retrieved from the ELODIE archive at Observatoire de Haute-Provence (OHP). |