Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Accretion disks around Black Holes with Advection and Optical Depth
  Transition   We consider the effects of advection and radial gradients of pressure and
radial drift velocity on the structure of accretion disks around black holes
with proper description of optically thick/thin transitions. We concentrated
our efforts on the models with large accretion rate. Contrary to disk models
neglecting advection, we find that continuous solutions extending from the
outer disk regions to the inner edge exist for all accretion rates we have
considered. We show that the sonic point moves outward with increasing
accretion rate, and that in the innermost disk region advection acts as a
heating process that may even dominate over dissipative heating. Despite the
importance of advection on it's structure, the disk remains geometrically thin.
Global solutions of advective accretion disks, which describe continuously the
transition between optically thick outer region and optically thin inner region
are constructed and analyzed.

14
The categories of this paper are: math-ph
8
The categories of this paper are: hep-ex
32
The categories of this paper are: atom-ph
1
The categories of this paper are: cs
37
The categories of this paper are: supr-con
36
The categories of this paper are: cmp-lg
11
The categories of this paper are: hep-lat
2
The categories of this paper are: math
24
The categories of this paper are: dg-ga
9
The categories of this paper are: nlin
35
The categories of this paper are: mtrl-th
13
The categories of this paper are: quant-ph
28
The categories of this paper are: alg-geom
27
The categories of this paper are: comp-gas
31
The categories of this paper are: ao-sci
15
The categories of this paper are: nucl-ex