Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Optical and Near-IR Spectra of O-rich Mira Variables : a Comparison
  between Models and Observations   Pulsation models are crucial for the interpretation of spectrophotometric and
interferometric observations of Mira variables. Comparing predicted and
observed spectra is one way of establishing the validity of such models. In
this paper, we focus on the models published between 1996 and 1998 by Bessell,
Hofmann, Scholz and Wood. A few new model spectra are added, to improve
available phase coverage. We compare the synthetic spectra with observed low
resolution spectra of optically selected oxygen-rich Miras, over a range of
optical and near-IR wavelengths that encompasses most of the stellar energy
output. We investigate the overall energy distributions, and specific spectral
features in the near-IR wavelength range. The agreement between the observed
and the model-predicted properties is found to be reasonably good. However,
there are discrepancies seen especially in various molecular bands. We find
that different combinations of stellar parameters and pulsation phases often
result in very similar model spectra. Therefore the problem of deriving
parameters of a Mira variable from its spectrum has no unique solution. More
advanced models than presently available, providing even better fits to the
data and covering a wider range of parameters, would be needed to achieve
better discrimination.

13
The categories of this paper are: quant-ph
4
The categories of this paper are: cond-mat
24
The categories of this paper are: dg-ga
36
The categories of this paper are: cmp-lg
28
The categories of this paper are: alg-geom
16
The categories of this paper are: stat
31
The categories of this paper are: ao-sci
20
The categories of this paper are: acc-phys
10
The categories of this paper are: q-bio
33
The categories of this paper are: plasm-ph
7
The categories of this paper are: hep-th
32
The categories of this paper are: atom-ph
22
The categories of this paper are: chao-dyn
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The categories of this paper are: bayes-an
5
The categories of this paper are: gr-qc
12
The categories of this paper are: nucl-th