Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Pulsating star research and the Gaia revolution   In this article we present an overview of the ESA Gaia mission and of the
unprecedented impact that Gaia will have on the field of variable star
research. We summarise the contents and impact of the first Gaia data release
on the description of variability phenomena, with particular emphasis on
pulsating star research. The Tycho-Gaia astrometric solution, although limited
to 2.1 million stars, has been used in many studies related to pulsating stars.
Furthermore a set of 3,194 Cepheids and RR Lyrae stars with their times series
have been released. Finally we present the plans for the ongoing study of
variable phenomena with Gaia and highlight some of the possible impacts of the
second data release on variable, and specifically, pulsating stars.

9
The categories of this paper are: nlin
8
The categories of this paper are: hep-ex
28
The categories of this paper are: alg-geom
7
The categories of this paper are: hep-th
30
The categories of this paper are: q-alg
16
The categories of this paper are: stat
29
The categories of this paper are: funct-an
37
The categories of this paper are: supr-con
1
The categories of this paper are: cs
18
The categories of this paper are: econ
4
The categories of this paper are: cond-mat
17
The categories of this paper are: q-fin
12
The categories of this paper are: nucl-th
22
The categories of this paper are: chao-dyn
26
The categories of this paper are: bayes-an
24
The categories of this paper are: dg-ga