Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Multi-wavelength emission from magnetically arrested disks around
  isolated black holes   We discuss the prospects for identifying nearest isolated black holes (IBHs)
in our Galaxy. IBHs accreting gas from the interstellar medium (ISM) likely
form magnetically arrested disks (MADs). We show that thermal electrons in the
MADs emit optical signals through the thermal synchrotron process while
non-thermal electrons accelerated via magnetic reconnections emit a
flat-spectrum synchrotron radiation in the X-ray to MeV gamma-ray ranges. The
Gaia catalog will include at most a thousand of IBHs within $\lesssim 1$ kpc
that are distributed on and around the cooling sequence of white dwarfs (WDs)
in the Hertzsprung-Russell diagram. These IBH candidates should also be
detected by eROSITA, with which they can be distinguished from isolated WDs and
neutron stars. Followup observations with hard X-ray and MeV gamma-ray
satellites will be useful to unambiguously identify IBHs.

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The categories of this paper are: q-fin
23
The categories of this paper are: solv-int
7
The categories of this paper are: hep-th
18
The categories of this paper are: econ
25
The categories of this paper are: patt-sol
22
The categories of this paper are: chao-dyn
4
The categories of this paper are: cond-mat
8
The categories of this paper are: hep-ex
29
The categories of this paper are: funct-an
12
The categories of this paper are: nucl-th
1
The categories of this paper are: cs
9
The categories of this paper are: nlin
11
The categories of this paper are: hep-lat
36
The categories of this paper are: cmp-lg
32
The categories of this paper are: atom-ph
13
The categories of this paper are: quant-ph