publication . Article . Preprint . 2011

Pulsations in M dwarf stars

Rodríguez-López, C.; MacDonald, J.; Moya, A.;
Open Access
  • Published: 04 Aug 2011 Journal: Monthly Notices of the Royal Astronomical Society: Letters, volume 419, pages L44-L48 (issn: 1745-3925, Copyright policy)
  • Publisher: Oxford University Press (OUP)
Abstract
We present the results of the first theoretical non-radial non-adiabatic pulsational study of M dwarf stellar models with masses in the range 0.1 to 0.5M_solar. We find the fundamental radial mode to be unstable due to an \epsilon mechanism caused by deuterium (D-) burning for the young 0.1 and 0.2M_solar models, by non-equilibrium He^3 burning for the 0.2 and 0.25M_solar models of 10^4Myr, and by a flux blocking mechanism for the partially convective 0.4 and 0.5M_solar models once they reach the age of 500Myr. The periods of the overstable modes excited by the D-burning are in the range 4.2 to 5.2h for the 0.1M_solar models and is of order 8.4h for the 0.2M_sol...
Subjects
arXiv: Astrophysics::Solar and Stellar Astrophysics
free text keywords: Physics, Stars, Astrophysics, Astrophysics - Solar and Stellar Astrophysics

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publication . Article . Preprint . 2011

Pulsations in M dwarf stars

Rodríguez-López, C.; MacDonald, J.; Moya, A.;