Asteroseismology of Kepler ZZ Ceti Stars with Fully Evolutionary Models

A. H. CÓRSICO; S. O. KEPLER; A. GIANNINAS; A. D. ROMERO; F. DE GERÓNIMO; A. KAWKA; B. G. CASTANHEIRA; D. KOESTER; C. BONATTO

Warwick

Workshop; 20th European White Dwarf Workshop; 2016

Recently the Kepler spacecraft observed ZZ Ceti stars giving theopportunity to study their variability for long baselines. We present astudy of pulsational properties of two ZZ Ceti stars observed with the Keplerspacecraft: GD 1212 and SDSS J113655.17+040952.6, based on a grid of full evolutionary models of DA white dwarf stars, characterized bydetailed and consistent inner chemical profiles. For J113655.17+040952we foundvalues of gravity and effective temperature in good agreement withspectroscopy. For GD 1212 the asteroseismological fits show a stellarmass higher than the spectroscopic value, but in agreement with the determinations fromphotometry coupled with parallax.