Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Near-infrared narrow-band photometry of M-giant and Mira stars: models
  meet observations   From near-infrared, narrow-band photometry of 256 oxygen-rich Mira variables
we obtain evidence about the loops that these stars follow in colour-colour
diagrams. We also find a phase lag between indices related to molecular
band-strength of titanium oxide and vanadium oxide. We compute colours for
normal M-giants and Miras using hydrostatic and hydrodynamic model atmospheres
and very extensive up-to-date line lists. Normal M-giants colours are well
reproduced, reaching a high quantitative agreement with observations for
spectral types earlier than M7. The out-of-phase variations of the various
spectral features of Miras are also acceptably reproduced, despite limitations
in the modelling. This enables us to confirm that the phase lag phenomenon
results from the propagation of perturbations in the extended atmosphere. It
opens new perspectives in the spectral modelling of Miras.

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The categories of this paper are: quant-ph
5
The categories of this paper are: gr-qc
2
The categories of this paper are: math
30
The categories of this paper are: q-alg
4
The categories of this paper are: cond-mat
15
The categories of this paper are: nucl-ex
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The categories of this paper are: nucl-th
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The categories of this paper are: stat
23
The categories of this paper are: solv-int
33
The categories of this paper are: plasm-ph
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The categories of this paper are: funct-an
26
The categories of this paper are: bayes-an
31
The categories of this paper are: ao-sci
34
The categories of this paper are: chem-ph
11
The categories of this paper are: hep-lat
0
The categories of this paper are: hep-ph