IALP   13078
INSTITUTO DE ASTROFISICA LA PLATA
Unidad Ejecutora - UE
congresos y reuniones científicas
Título:
New cooling sequences for old hydrogen-rich white dwarfs
Autor/es:
RENEDO, ISABEL; ALTHAUS, LEANDRO G.; CÓRSICO, ALEJANDRO; ROMERO, A. D.; MILLER BERTOLAMI, MARCELO M.; ROHRMANN, R. D.; GARCÍA-BERRO, ENRIQUE
Lugar:
Tuebingen, Alemania
Reunión:
Workshop; 17TH EUROPEAN WHITE DWARF WORKSHOP; 2010
Institución organizadora:
Universidad de Tuebingen
Resumen:
We present fully evolutionary white dwarf cooling tracks for
hydrogen-rich DA white dwarfs. Our cooling sequences have been obtaind
evolving white dwarf progenitors from the zero age main sequence,
through the core hydrogen burning phase, the helium burning phase and
the thermally pulsing asymptotic giant branch phase. Moreover, our
evolutionary sequences are computed for a wide range of stellar masses
and for two different metallicities: Z = 0.01 and Z = 0.001. The cooling
sequences described here incorporate nuclear reactions during the early
phases of white dwarf evolution, diffusion of the elements in the outer
layers and, finally, all the relevant energy sources in the deep
interior of the white dwarf, like the release of latent heat and the
release of gravitational energy due to carbon-oxygen phase separation
upon crystallization. We also provide colors and magnitudes for these
sequences, computed using non-gray atmospheres, which include the
Lyα quasi-molecular opacity. The calculations are extended down to
an effective temperature of 2,500 K.