Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Non-conservative mass transfer in stellar evolution and the case of V404
  Cyg/GS 2023+338   We consider donor evolution and mass transfer in the microquasar V404 Cyg/GS
2023+338. Based on X-ray observations of its two outbursts, its average mass
accretion rate is substantially lower than our model mass-loss rate from its
low-mass giant donor. A likely solution to this discrepancy is that a large
fraction of the mass flowing from the donor leaves the binary in the form of
outflows from the accretion disc around the accretor. The outflow can be
parameterizes by the fractions of the mass and angular momentum leaving the
system. We calculate the latter as a function of the radius of the accretion
disc from which the outflow takes place. We then perform detailed evolutionary
calculations for V404 Cyg. Given our estimated average accretion rate, $>$70
per cent of the mass lost from the donor has to leave the binary. The allowed
solutions for the actual donor mass loss rate are parameterized by our two
outflow parameters. Our results are in agreement with the observed outflows
from the outer disc as well as with the variable near-Eddington accretion
observed during the outbursts, compatible with outflows from the vicinity of
the black hole. We then calculate the expected rate of the orbital period
change. Its future measurements can constrain the presence of an outflow in
V404 Cyg and its parameters.

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The categories of this paper are: nucl-ex
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The categories of this paper are: nlin
13
The categories of this paper are: quant-ph
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The categories of this paper are: dg-ga
31
The categories of this paper are: ao-sci
3
The categories of this paper are: physics
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The categories of this paper are: stat
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The categories of this paper are: alg-geom
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The categories of this paper are: q-fin
4
The categories of this paper are: cond-mat
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The categories of this paper are: nucl-th
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The categories of this paper are: patt-sol
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The categories of this paper are: cmp-lg
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The categories of this paper are: math-ph
8
The categories of this paper are: hep-ex
33
The categories of this paper are: plasm-ph