Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: The age-metallicity dependence for white dwarfs   We present a theoretical study on the metallicity dependence of the
initial$-$to$-$final mass relation and its influence on white dwarf age
determinations. We compute a grid of evolutionary sequences from the main
sequence to $\sim 3\, 000$ K on the white dwarf cooling curve, passing through
all intermediate stages. During the thermally-pulsing asymptotic giant branch
no third dredge-up episodes are considered and thus the photospheric C/O ratio
is below unity for sequences with metallicities larger than $Z=0.0001$. We
consider initial metallicities from $Z=0.0001$ to $Z=0.04$, accounting for
stellar populations in the galactic disk and halo, with initial masses below
$\sim 3M_{\odot}$. We found a clear dependence of the shape of the
initial$-$to$-$final mass relation with the progenitor metallicity, where metal
rich progenitors result in less massive white dwarf remnants, due to an
enhancement of the mass loss rates associated to high metallicity values. By
comparing our theoretical computations with semi empirical data from globular
and old open clusters, we found that the observed intrinsic mass spread can be
accounted for by a set of initial$-$to$-$final mass relations characterized by
different metallicity values. Also, we confirm that the lifetime spent before
the white dwarf stage increases with metallicity. Finally, we estimate the mean
mass at the top of the white dwarf cooling curve for three globular clusters
NGC 6397, M4 and 47 Tuc, around $0.53 M_{\odot}$, characteristic of old stellar
populations. However, we found different values for the progenitor mass, lower
for the metal poor cluster, NGC 6397, and larger for the younger and metal rich
cluster 47 Tuc, as expected from the metallicity dependence of the
initial$-$to$-$final mass relation.

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The categories of this paper are: dg-ga
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The categories of this paper are: acc-phys
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The categories of this paper are: hep-ex
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The categories of this paper are: nucl-ex
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The categories of this paper are: mtrl-th
12
The categories of this paper are: nucl-th
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The categories of this paper are: atom-ph
1
The categories of this paper are: cs
34
The categories of this paper are: chem-ph
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The categories of this paper are: funct-an
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The categories of this paper are: stat
0
The categories of this paper are: hep-ph
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The categories of this paper are: hep-lat
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The categories of this paper are: bayes-an
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The categories of this paper are: quant-ph
4
The categories of this paper are: cond-mat