Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: The Period Evolution of the Chemically Peculiar Star V473 Tau   In this paper, the period evolution of the rotating chemically peculiar star
V473\,Tau (A0Si, V = 7.26 mag) is investigated. Even though the star has been
observed for more than fifty years, for the first time four consecutive years
of space-based data covering between 2007 and 2010 is presented. The data is
from the {\sl STEREO} satellite, and is combined with the archival results. The
analysis shows that the rotation period of V473\,Tau is $1.406829(10)$ days,
and has slightly decreased with the variation rate of -0.11(3)~s~yr$^{-1}$ over
time. Also, the acceleration timescale of the star is found to be around
$-1.11(63) \times 10^6$~yr, shorter than its main sequence lifetime
($9.26(1.25) \times 10^8$~yr). This indicates that the process of decrease in
period might be reversible. On this basis, it can be suggested that V473\,Tau
has a possible magnetic breaking and a differential rotation, which cause a
variation in the movement of inertia, and hence the observed period change.

23
The categories of this paper are: solv-int
29
The categories of this paper are: funct-an
8
The categories of this paper are: hep-ex
22
The categories of this paper are: chao-dyn
18
The categories of this paper are: econ
13
The categories of this paper are: quant-ph
27
The categories of this paper are: comp-gas
1
The categories of this paper are: cs
5
The categories of this paper are: gr-qc
26
The categories of this paper are: bayes-an
3
The categories of this paper are: physics
28
The categories of this paper are: alg-geom
7
The categories of this paper are: hep-th
21
The categories of this paper are: adap-org
9
The categories of this paper are: nlin
10
The categories of this paper are: q-bio