Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: The evolution of inner disk radius with orbital phase in Circinus X-1   Using RXTE observations, we investigate the evolution of inner disk radius
R_in of Cir X-1 during two cycles and find obvious orbital modulation. We argue
that the modulation is attributed to its high orbital eccentricity. The disk
luminosity is inversely with the inner disk temperature kT_in, which is
ascribed to the slow increase of kT_in and, however, the rapid decrease of R_in
during the passage for the neutron star to depart from the companion star.

20
The categories of this paper are: acc-phys
19
The categories of this paper are: eess
21
The categories of this paper are: adap-org
34
The categories of this paper are: chem-ph
30
The categories of this paper are: q-alg
8
The categories of this paper are: hep-ex
2
The categories of this paper are: math
31
The categories of this paper are: ao-sci
27
The categories of this paper are: comp-gas
0
The categories of this paper are: hep-ph
16
The categories of this paper are: stat
32
The categories of this paper are: atom-ph
35
The categories of this paper are: mtrl-th
7
The categories of this paper are: hep-th
22
The categories of this paper are: chao-dyn
33
The categories of this paper are: plasm-ph