Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Two-temperature coronae in active galactic nuclei   We show that coronal magnetic dissipation in thin active sheets that sandwich
standard thin accretion disks in active galactic nuclei may account for
canonical electron temperatures of a few $\times 10^9$K if protons acquire most
of the dissipated energy. Coulomb collisions transfer energy from the ions to
the electrons, which subsequently cool rapidly by inverse-Compton scattering.
In equilibrium, the proton energy density likely exceeds that of the magnetic
field and both well exceed the electron and photon energy densities. The
Coulomb energy transfer from protons to electrons is slow enough to maintain a
high proton temperature, but fast enough to explain observed rapid X-ray
variabilities in Seyferts. The $\sim 10^9$K electron temperature is insensitive
to the proton temperature when the latter is $\ge 10^{12}$K.

27
The categories of this paper are: comp-gas
11
The categories of this paper are: hep-lat
7
The categories of this paper are: hep-th
9
The categories of this paper are: nlin
12
The categories of this paper are: nucl-th
32
The categories of this paper are: atom-ph
5
The categories of this paper are: gr-qc
34
The categories of this paper are: chem-ph
24
The categories of this paper are: dg-ga
18
The categories of this paper are: econ
10
The categories of this paper are: q-bio
33
The categories of this paper are: plasm-ph
2
The categories of this paper are: math
22
The categories of this paper are: chao-dyn
8
The categories of this paper are: hep-ex
17
The categories of this paper are: q-fin