Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: On the pulsation parallax of the variable star RR Lyr   We show that a straightforward application of the predicted relation
connecting the absolute K magnitude of fundamental RR Lyrae variables to their
period and metal content, together with current evolutionary predictions on the
mass and luminosity of Horizontal Branch stars, supply a distance estimate to
the prototype star RR Lyr in close agreement with the recent parallax
determination by HST (Benedict et al. 2002), largely unaffected by the
interstellar extinction correction. Adopting <A_V>=0.12+-0.10 mag as a safe
estimate of the extinction correction to RR Lyr, we obtain a "pulsation"
parallax of 3.858+-0.131 mas which agrees quite well, and with a smaller formal
error, with the HST measurement (3.82+-0.20 mas) and with the weighted average
of HST, Hipparcos, and ground-based determinations (3.87+-0.19 mas). This
result suggests that near-infrared magnitudes and pulsation models could
constrain the distance to well-studied RR Lyrae stars, both in the field and in
globular clusters, with an accuracy better than current direct trigonometric
measurements.

32
The categories of this paper are: atom-ph
27
The categories of this paper are: comp-gas
36
The categories of this paper are: cmp-lg
9
The categories of this paper are: nlin
21
The categories of this paper are: adap-org
20
The categories of this paper are: acc-phys
1
The categories of this paper are: cs
3
The categories of this paper are: physics
24
The categories of this paper are: dg-ga
17
The categories of this paper are: q-fin
28
The categories of this paper are: alg-geom
10
The categories of this paper are: q-bio
12
The categories of this paper are: nucl-th
13
The categories of this paper are: quant-ph
14
The categories of this paper are: math-ph
16
The categories of this paper are: stat