Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Evolution of Line-Force Multiplier Parameters in Radiation Driven Winds
  of Massive Stars   We present two self-consistent procedures that couple the hydrodynamics with
calculations of the line-force in the frame of radiation wind theory. These
procedures give us the line-force parameters, the velocity field, and the
mass-loss rate. The first one is based on the so-called m-CAK theory. A full
set of line-force parameters for $T_\text{eff}\ge 32,000$ K and surface
gravities higher than 3.4 dex for two different metallicities are presented,
along with their corresponding wind parameters. We find that the dependence of
line-force parameters on effective temperature is enhanced by the dependence on
$\log g$. For the case of homogeneous winds (without clumping) comparison of
self-consistent mass-loss rates shows a good agreement with empirical values.
We also consider self-consistent wind solutions that are used as input in
FASTWIND to calculate synthetic spectra. By comparison with the observed
spectra for three stars with clumped winds, we found that varying the clumping
factor the synthetic spectra rapidly converge into the neighbourhood region of
the solution. Therefore, this self-consistent m-CAK procedure significantly
reduces the number of free parameters needed to obtain a synthetic spectrum.
  The second procedure (called Lambert-procedure) provides a self-consistent
solution beyond m-CAK theory, and line-acceleration is calculated by the full
NLTE radiative transfer code CMFGEN. Both the mass-loss rate and the clumping
factor are set as free parameters, hence their values are obtained by spectral
fitting after the respective self-consistent hydrodynamics is calculated. Since
performing the Lambert-procedure requires significant computational power, the
analysis is made only for the star z-Puppis.
  The promising results gives a positive balance about the future applications
for the self-consistent solutions presented on this thesis.

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The categories of this paper are: supr-con
29
The categories of this paper are: funct-an
9
The categories of this paper are: nlin
33
The categories of this paper are: plasm-ph
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The categories of this paper are: econ
12
The categories of this paper are: nucl-th
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The categories of this paper are: ao-sci
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The categories of this paper are: cmp-lg
3
The categories of this paper are: physics
34
The categories of this paper are: chem-ph
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The categories of this paper are: bayes-an
17
The categories of this paper are: q-fin
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The categories of this paper are: cs
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The categories of this paper are: hep-th
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The categories of this paper are: stat
11
The categories of this paper are: hep-lat