Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Rotation periods and ages of solar analogs and solar twins revealed by
  the Kepler Mission   A new sample of solar analogs and twin candidates have been constructed and
studied, with particular attention to their light curves from NASA's Kepler
mission. This letter aims to assess the evolutionary status, derive their
rotation and ages and identify those solar analogs or solar twin candidates. We
separate out the subgiants that compose a large fraction of the asteroseismic
sample, and which show an increase in the average rotation period as the stars
ascend the subgiant branch. The rotation periods of the dwarfs, ranging from 6
to 30 days, and averaged 19d, allow us to assess their individual evolutionary
states on the main sequence, and to derive their ages using gyrochronology.
These ages are found to be in agreement with a correlation coefficient of r =
0.79 with the independent asteroseismic ages, where available. As a result of
this investigation, we are able to identify 34 stars as solar analogs and 22 of
them as solar twin candidates.

24
The categories of this paper are: dg-ga
5
The categories of this paper are: gr-qc
34
The categories of this paper are: chem-ph
13
The categories of this paper are: quant-ph
12
The categories of this paper are: nucl-th
3
The categories of this paper are: physics
32
The categories of this paper are: atom-ph
10
The categories of this paper are: q-bio
22
The categories of this paper are: chao-dyn
37
The categories of this paper are: supr-con
23
The categories of this paper are: solv-int
27
The categories of this paper are: comp-gas
8
The categories of this paper are: hep-ex
35
The categories of this paper are: mtrl-th
33
The categories of this paper are: plasm-ph
0
The categories of this paper are: hep-ph