Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Ionization structure of hot components in symbiotic binaries during
  active phases   During active phases of symbiotic binaries, an optically thick medium in the
form of a flared disk develops around their hot stars. During quiescent phases,
this structure is not evident. We propose the formation of a flared neutral
disk-like structure around the rotating white dwarf (WD) in symbiotic binaries.
We applied the wind compression model and calculated the ionization boundaries
in the compressed wind from the WD using the equation of photoionization
equilibrium. During active phases, the compression of the enhanced wind from
the rotating WD can form a neutral disk-like zone at the equatorial plane,
while the remainder of the sphere above/below the disk is ionized. Calculated
hydrogen column density throughout the neutral zone and the emission measure of
the ionized fraction of the wind are consistent with those derived from
observations. During quiescent phases, the neutral disk-like structure cannot
be created because of insufficient mass loss rate. Formation of the neutral
disk-like zone at the equatorial plane is connected with the enhanced wind from
the rotating WD, observed during active phases of symbiotic binaries. This
probably represents a common origin of warm pseudophotospheres, indicated in
the spectrum of active symbiotic binaries with a high orbital inclination.

25
The categories of this paper are: patt-sol
34
The categories of this paper are: chem-ph
14
The categories of this paper are: math-ph
2
The categories of this paper are: math
22
The categories of this paper are: chao-dyn
9
The categories of this paper are: nlin
23
The categories of this paper are: solv-int
16
The categories of this paper are: stat
11
The categories of this paper are: hep-lat
36
The categories of this paper are: cmp-lg
31
The categories of this paper are: ao-sci
21
The categories of this paper are: adap-org
32
The categories of this paper are: atom-ph
0
The categories of this paper are: hep-ph
37
The categories of this paper are: supr-con
29
The categories of this paper are: funct-an