Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Determining mass accretion and jet mass-loss rates in post-asymptotic
  giant branch binary systems   Aims. In this study, we determine the morphology and mass-loss rate of jets
emanating from the companion in post-asymptotic giant branch (post-AGB) binary
stars with a circumbinary disk. In doing so, we also determine the mass
accretion rates on to the companion and investigate the source feeding the
circum-companion accretion disk. Methods. We perform a spatio-kinematic
modelling of the jet of two well-sampled post-AGB binaries, BD+46442 and
IRAS19135+3937, by fitting the orbital phased time series of H-alpha spectra.
Once the jet geometry, velocity and scaled density structure are computed, we
carry out radiative transfer modelling of the jet for the first four Balmer
lines to determine the jet densities, thus allowing us to compute the jet
mass-loss rates and mass accretion rates. Results. The spatio-kinematic model
of the jet reproduces the observed absorption feature in the H-alpha lines. In
both objects, the jets have an inner region with extremely low density. Using
our radiative transfer model, we find the full three-dimensional density
structure of both jets. From these results, we can compute mass-loss rates of
the jets, which are of the order of 10^-7 - 10^-5 M_sol/yr. We estimate mass
accretion rates onto the companion of 10^-6 - 10^-4 M_sol/yr. Conclusions.
Based on the mass accretion rates found for these two objects, we conclude that
the circumbinary disk is most likely the source feeding the circum-companion
accretion disk. This is in agreement with the observed depletion patterns in
post-AGB binaries. The high accretion rates from the circumbinary disk imply
that the lifetime of the disk will be short. Mass-transfer from the post-AGB
star cannot be excluded in these systems, but it is unlikely to provide a
sufficient mass-transfer rate to sustain the observed jet mass-loss rates.

15
The categories of this paper are: nucl-ex
36
The categories of this paper are: cmp-lg
13
The categories of this paper are: quant-ph
37
The categories of this paper are: supr-con
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The categories of this paper are: eess
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The categories of this paper are: solv-int
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The categories of this paper are: bayes-an
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The categories of this paper are: alg-geom
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The categories of this paper are: q-alg
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The categories of this paper are: dg-ga
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The categories of this paper are: hep-ex
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The categories of this paper are: acc-phys
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The categories of this paper are: comp-gas
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The categories of this paper are: hep-th
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The categories of this paper are: plasm-ph
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The categories of this paper are: nucl-th