Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: New cooling sequences for old white dwarfs   We present full evolutionary calculations appropriate for the study of
hydrogen-rich DA white dwarfs. This is done by 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 to
the white dwarf stage. Complete evolutionary sequences are computed for a wide
range of stellar masses and for two different metallicities: Z=0.01, which is
representative of the solar neighborhood, and Z=0.001, which is appropriate for
the study of old stellar systems, like globular clusters. During the white
dwarf cooling stage we compute self-consistently the phase in which nuclear
reactions are still important, the diffusive evolution of the elements in the
outer layers and, finally, we also take into account 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, based on a new set of improved non-gray white dwarf model
atmospheres, which include the most up-to-date physical inputs like the Lyman
alpha quasi-molecular opacity. The calculations are extended down to an
effective temperature of 2,500 K. Our calculations provide a homogeneous set of
evolutionary cooling tracks appropriate for mass and age determinations of old
DA white dwarfs and for white dwarf cosmochronology of the different Galactic
populations.

31
The categories of this paper are: ao-sci
14
The categories of this paper are: math-ph
17
The categories of this paper are: q-fin
15
The categories of this paper are: nucl-ex
22
The categories of this paper are: chao-dyn
33
The categories of this paper are: plasm-ph
16
The categories of this paper are: stat
25
The categories of this paper are: patt-sol
20
The categories of this paper are: acc-phys
19
The categories of this paper are: eess
11
The categories of this paper are: hep-lat
37
The categories of this paper are: supr-con
26
The categories of this paper are: bayes-an
34
The categories of this paper are: chem-ph
7
The categories of this paper are: hep-th
2
The categories of this paper are: math