Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Accretion by the Secondary in Eta Carinae During the Spectroscopic
  Event: I. Flow Parameters   We examine the influence of the gravity of the companion (the secondary) to
the massive primary star Eta Carinae on the winds blown by the primary and the
secondary. The two winds collide with each other after passing through two
respective shock waves, and escape the system while strongly emitting in the
X-ray band. While during most of the 5.5 years orbital period, the companion's
gravity has a negligible effect on the winds, we find that near periastron, the
companion's gravity may significantly influence the flow and the companion
might accrete from the primary's wind under certain circumstances. Near
periastron passage, the collision region of the two winds may collapse onto the
secondary star, a process that could substantially reduce the X-ray luminosity.
We suggest that such an accretion process produces the long, almost flat, X-ray
minimum in Eta Carinae.

21
The categories of this paper are: adap-org
29
The categories of this paper are: funct-an
2
The categories of this paper are: math
37
The categories of this paper are: supr-con
24
The categories of this paper are: dg-ga
28
The categories of this paper are: alg-geom
20
The categories of this paper are: acc-phys
27
The categories of this paper are: comp-gas
15
The categories of this paper are: nucl-ex
33
The categories of this paper are: plasm-ph
13
The categories of this paper are: quant-ph
4
The categories of this paper are: cond-mat
3
The categories of this paper are: physics
36
The categories of this paper are: cmp-lg
30
The categories of this paper are: q-alg
18
The categories of this paper are: econ