Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: The impact of Faraday effects on polarized black hole images of
  Sagittarius A*   We study model images and polarization maps of Sagittarius A* at 230 GHz. We
post-process GRMHD simulations and perform a fully relativistic radiative
transfer calculation of the emitted synchrotron radiation to obtain polarized
images for a range of mass accretion rates and electron temperatures. At low
accretion rates, the polarization map traces the underlying toroidal magnetic
field geometry. At high accretion rates, we find that Faraday rotation internal
to the emission region can depolarize and scramble the map. We measure the net
linear polarization fraction and find that high accretion rate "jet-disc"
models are heavily depolarized and are therefore disfavoured. We show how Event
Horizon Telescope measurements of the polarized "correlation length" over the
image provide a model-independent upper limit on the strength of these Faraday
effects, and constrain plasma properties like the electron temperature and
magnetic field strength.

7
The categories of this paper are: hep-th
0
The categories of this paper are: hep-ph
33
The categories of this paper are: plasm-ph
25
The categories of this paper are: patt-sol
20
The categories of this paper are: acc-phys
19
The categories of this paper are: eess
15
The categories of this paper are: nucl-ex
17
The categories of this paper are: q-fin
4
The categories of this paper are: cond-mat
8
The categories of this paper are: hep-ex
34
The categories of this paper are: chem-ph
13
The categories of this paper are: quant-ph
16
The categories of this paper are: stat
31
The categories of this paper are: ao-sci
23
The categories of this paper are: solv-int
5
The categories of this paper are: gr-qc