Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: On the Tachocline Zone Location in the Sun, the Luminosity Transport
  time scale, the Rotational Inertia and their Time Variation in Standard Solar
  Evolution Models   Studies with GONG Standard Solar Evolution Models sampling the evolution of
the sun from its ZAMS stage show the following. The location of the tachocline
zone is nearly fixed as it is not affected by shell burning although it
co-moves with the expansion of the sun up to the present age of 4.6 Gyr. The
luminosity transport time scale of the sun is entirely dominated by photon
diffusion and during the evolution has decreased from over 204000 years to
187000 years. The rotational inertia of the sun shows a small gradual increase
from 6.73x10^46 kg m^2 to 7.09x10^46 kg m^2 at present but the inertia constant
decreases from 0.0911 to 0.0736 during the same period.

35
The categories of this paper are: mtrl-th
8
The categories of this paper are: hep-ex
13
The categories of this paper are: quant-ph
33
The categories of this paper are: plasm-ph
36
The categories of this paper are: cmp-lg
7
The categories of this paper are: hep-th
30
The categories of this paper are: q-alg
3
The categories of this paper are: physics
25
The categories of this paper are: patt-sol
29
The categories of this paper are: funct-an
31
The categories of this paper are: ao-sci
4
The categories of this paper are: cond-mat
0
The categories of this paper are: hep-ph
14
The categories of this paper are: math-ph
27
The categories of this paper are: comp-gas
12
The categories of this paper are: nucl-th