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E. Alécian, C. Catala, M.J. Goupil

RS Cha A binary system suitable for testing stellar physics modeling during the pre-main sequence phase. E. Alécian, C. Catala, M.J. Goupil. LESIA - Observatoire de Paris-Meudon. 2 nd Corot-Brazil Workshop, Ubatuba. 5 Nov. 2005. Evelyne Alécian. RS Cha : an PMS eclipsing SB2 system.

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E. Alécian, C. Catala, M.J. Goupil

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  1. RS ChaA binary system suitable for testing stellar physics modeling during the pre-main sequence phase. E. Alécian, C. Catala, M.J. Goupil LESIA - Observatoire de Paris-Meudon 2nd Corot-Brazil Workshop, Ubatuba 5 Nov. 2005

  2. Evelyne Alécian RS Cha : an PMS eclipsing SB2 system

  3. Evelyne Alécian RS Cha : PMS Spectroscopic Binary CESAM

  4. Evelyne Alécian RS Cha : PMS Spectroscopic Binary CESAM

  5. Error boxes calculated from masses and radii Evelyne Alécian RS Cha : PMS Spectroscopic Binary CESAM

  6. Log(L/L) Log(Teff) (K) Palla & Stahler (2001) Evelyne Alécian  Scuti type pulsations in RS Cha Andersen (1975) : primary  PMS  Scuti star Marconi & Palla (1998) : theoretical instability strip Palla & Stahler (2001) : secondary  PMS  Scuti star Alécian et al. (2005) : both are pulsating June 19-24 2005 Stellar Pulsation and Evolution

  7. Residuals = vobs - vcalc vcalc : velocity calculated from Clausen & Nordström (1980) ephemeris Evelyne Alécian  Scuti type pulsations in both components Primary Secondary Alécian et al. (2005)

  8. Periodic variations Pulsation period ~ 1 h Alécian et al. (2005) Evelyne Alécian  Scuti type pulsations in both components Residuals Primary Secondary Alécian et al. (2005) June 19-24 2005 Stellar Pulsation and Evolution

  9. Primary star, M = 1.89 M degree l Evelyne Alécian Theoretical modes pulsations Non-adiabatic calculations MAD (M.-A. Dupret)

  10. Secondary star, M = 1.87 M degree l Evelyne Alécian Theoretical modes pulsations Non-adiabatic calculations MAD (M. A. Dupret)

  11. Evelyne Alécian Perspectives • Improving temperature determination : next step • Improving knowledge of pulsations : long term continuous • multi-site monitoring of spectroscopic data

  12. Evelyne Alécian Autres diapo

  13. Evelyne Alécian RS Cha : PMS Spectroscopic Binary June 19-24 2005 Stellar Pulsation and Evolution

  14. Evelyne Alécian RS Cha : PMS Spectroscopic Binary June 19-24 2005 Stellar Pulsation and Evolution

  15. Evelyne Alécian RS Cha : Observations June 19-24 2005 Stellar Pulsation and Evolution

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