Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Asteroseismic constraints on the cosmic-time variation of the
  gravitational constant from an ancient main-sequence star   We investigate the variation of the gravitational constant $G$ over the
history of the Universe by modeling the effects on the evolution and
asteroseismology of the low-mass star KIC 7970740, which is one of the oldest
(~11 Gyr) and best-observed solar-like oscillators in the Galaxy. From these
data we find $\dot{G}/G = (1.2 \pm 2.6) \times 10^{-12}~\text{yr}^{-1}$, that
is, no evidence for any variation in $G$. We also find a Bayesian asteroseismic
estimate of the age of the Universe as well as astrophysical S-factors for five
nuclear reactions obtained through a 12-dimensional stellar evolution Markov
chain Monte Carlo simulation.

31
The categories of this paper are: ao-sci
13
The categories of this paper are: quant-ph
18
The categories of this paper are: econ
37
The categories of this paper are: supr-con
32
The categories of this paper are: atom-ph
10
The categories of this paper are: q-bio
24
The categories of this paper are: dg-ga
1
The categories of this paper are: cs
28
The categories of this paper are: alg-geom
19
The categories of this paper are: eess
35
The categories of this paper are: mtrl-th
17
The categories of this paper are: q-fin
3
The categories of this paper are: physics
14
The categories of this paper are: math-ph
21
The categories of this paper are: adap-org
9
The categories of this paper are: nlin