[en] We use accurate spectroscopic data of the pre-main sequence eclipsing binary system RS Cha to redetermine masses and radii of both components and to measure the metallicity of the system. Knowing all fundamental parameters of both stars we are able to test stellar physics modeling during the PMS phase. We find no evidence that our models are deficient. Accurate detection of modes and measurements of periods of the recently discovered pulsations in both components are required to constrain more severely the physical description of PMS stellar models..
Disciplines :
Space science, astronomy & astrophysics
Author, co-author :
Alecian, E.; Observatoire de Paris, LESIA, 5, place Jules Janssen, F-92195 Meudon Principal CEDEX, France
Catala, C.; Observatoire de Paris, LESIA, 5, place Jules Janssen, F-92195 Meudon Principal CEDEX, France
Goupil, Marie-José; Observatoire de Paris, LESIA, 5, place Jules Janssen, F-92195 Meudon Principal CEDEX, France
Lebreton, Y.; Observatoire de Paris, GEPI, 5, place Jules Janssen, F-92195 Meudon Principal CEDEX, France
Dupret, Marc-Antoine ; Université de Liège - ULiège > Département d'astrophys., géophysique et océanographie (AGO) > Astrophysique stellaire théorique
Language :
English
Title :
RS Cha, a binary system suitable for testing stellar physics modeling during the pre-main sequence phase.