Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Pulsation and evolutionary masses of classical Cepheids. I. Milky Way
  variables   We investigate a selected sample of Galactic classical Cepheids with
available distance and reddening estimates in the framework of the theoretical
scenario provided by pulsation models, computed with metal abundance Z=0.02,
helium content in the range of Y=0.25 to 0.31, and various choices of the
stellar mass and luminosity. After transforming the bolometric light curve of
the fundamental models into BVRIJK magnitudes, we derived analytical relations
connecting the pulsation period with the stellar mass, the mean
(intensity-averaged) absolute magnitude, and the color of the pulsators. These
relations are used together with the Cepheid observed absolute magnitudes in
order to determine the "pulsation" mass -M_p- of each individual variable. The
comparison with the "evolutionary" masses -M_(e,can)- given by canonical (no
convective core overshooting, no mass-loss) models of central He-burning
stellar structures reveals that the M_p/M_(e,can) ratio is correlated with the
Cepheid period, ranging from about 0.8 at logP=0.5 to about 1 at logP=1.5. We
discuss the effects of different input physics and/or assumptions on the
evolutionary computations, as well as of uncertainties in the adopted Cepheid
metal content, distance, and reddening. Eventually, we find that the
pulsational results can be interpreted in terms of mass-loss during or before
the Cepheid phase, whose amount increases as the Cepheid original mass
decreases. It vanishes around 13M_(sun) and increases up to about 20% at
4M_(sun).

22
The categories of this paper are: chao-dyn
27
The categories of this paper are: comp-gas
9
The categories of this paper are: nlin
26
The categories of this paper are: bayes-an
11
The categories of this paper are: hep-lat
29
The categories of this paper are: funct-an
23
The categories of this paper are: solv-int
5
The categories of this paper are: gr-qc
20
The categories of this paper are: acc-phys
0
The categories of this paper are: hep-ph
34
The categories of this paper are: chem-ph
17
The categories of this paper are: q-fin
15
The categories of this paper are: nucl-ex
35
The categories of this paper are: mtrl-th
2
The categories of this paper are: math
36
The categories of this paper are: cmp-lg