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V405 ANDROMEDA REVISITED
Indexado
WoS WOS:000295042500010
Scopus SCOPUS_ID:80054031550
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


Abstract



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.

Revista



Revista ISSN
Astronomical Journal 0004-6256

Métricas Externas



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Disciplinas de Investigación



WOS
Astronomy & Astrophysics
Scopus
Sin Disciplinas
SciELO
Sin Disciplinas

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Publicaciones WoS (Ediciones: ISSHP, ISTP, AHCI, SSCI, SCI), Scopus, SciELO Chile.

Colaboración Institucional



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Autores - Afiliación



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

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Financiamiento



Fuente
CNPq
CAPES/CNPq
NASA
CNPq/Brazil

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Agradecimientos



Agradecimiento
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).

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