Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: The population of white dwarf-main sequence binaries in the SDSS DR 12   We present a Monte Carlo population synthesis study of white dwarf-main
sequence (WD+MS) binaries in the Galactic disk aimed at reproducing the
ensemble properties of the entire population observed by the Sloan Digital Sky
Survey (SDSS) Data Release 12. Our simulations take into account all known
observational biases and use the most up-to-date stellar evolutionary models.
This allows us to perform a sound comparison between the simulations and the
observational data. We find that the properties of the simulated and observed
parameter distributions agree best when assuming low values of the common
envelope efficiency (0.2-0.3), a result that is in agreement with previous
findings obtained by observational and population synthesis studies of close
SDSS WD+MS binaries. We also show that all synthetic populations that result
from adopting an initial mass ratio distribution with a positive slope are
excluded by observations. Finally, we confirm that the properties of the
simulated WD+MS binary populations are nearly independent of the age adopted
for the thin disk, on the contribution of WD+MS binaries from the thick disk
(0-17 per cent of the total population) and on the assumed fraction of the
internal energy that is used to eject the envelope during the common envelope
phase (0.1-0.5).

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The categories of this paper are: supr-con
15
The categories of this paper are: nucl-ex
32
The categories of this paper are: atom-ph
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The categories of this paper are: funct-an
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The categories of this paper are: math-ph
5
The categories of this paper are: gr-qc
3
The categories of this paper are: physics
8
The categories of this paper are: hep-ex
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The categories of this paper are: cmp-lg
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The categories of this paper are: bayes-an
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The categories of this paper are: eess
0
The categories of this paper are: hep-ph
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The categories of this paper are: econ
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The categories of this paper are: stat
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The categories of this paper are: adap-org
33
The categories of this paper are: plasm-ph