Open AccessThe exoplanet-host star μ Arae: a new seismic analysis
Author(s) -
M. Flores Soriano,
S. Vauclair
Publication year - 2008
Publication title -
journal of physics. conference series
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.21
H-Index - 85
eISSN - 1742-6596
pISSN - 1742-6588
DOI - 10.1088/1742-6596/118/1/012072
Subject(s) - exoplanet , asteroseismology , spectrograph , physics , metallicity , planet , observatory , star (game theory) , stars , astrophysics , astronomy , spectral line
International audienceWe present here the detailled modelling of the exoplanet-host star μ Arae, which is known to harbour a four-planets system. This star presents a metallicity excess compared to stars without detected planets. Asteroseismology can help determining precisely its internal structure, μ Arae was observed with the HARPS spectrograph at La Silla Observatory in June 2004, and 43 p-modes were identified. Using the external parameters provided by spectroscopy and the seismic constraints, we computed new stellar models, in a wider range and more precisely than [1], with various assumptions (overmetallic or accretion scenario, overshooting or not, Y enriched with metals or Y fixed to its solar value). We tried to find which ones give the best fit to the observations