Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: The influence of accretion disk thickness on the large-scale magnetic
  dynamo   The evolution of the magnetic field from the large-scale dynamo is considered
a central feature of the accretion disk around a black hole. The resulting
low-frequency oscillations introduced from the growth and decay of the field
strength, along with the change in field orientation, play an integral role in
the accretion disk behavior. Despite the importance of this process and how
commonly it is invoked to explain variable features, it still remains poorly
understood. We present a study of the dynamo using a suite of four global,
high-resolution, MHD accretion disk simulations. We systematically vary the
scale height ratio and find the large-scale dynamo fails to organize above a
scale height ratio of $h/r \gtrsim0.2$. Using spacetime diagrams of the
azimuthal magnetic field, we show the large-scale dynamo is well-ordered in the
thinner accretion disk models, but fails to develop the characteristic
"butterfly" pattern when the scale height ratio is increased, a feature which
is also reflected in the power spectra. Additionally, we calculate the dynamo
$\alpha$-parameter and generate synthetic light curves. Using an emission
proxy, we find the disks have markedly different characters as stochastic
photometric fluctuations have a larger amplitude when the dynamo is unordered.

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The categories of this paper are: hep-ph
4
The categories of this paper are: cond-mat
16
The categories of this paper are: stat
28
The categories of this paper are: alg-geom
2
The categories of this paper are: math
23
The categories of this paper are: solv-int
33
The categories of this paper are: plasm-ph
11
The categories of this paper are: hep-lat
24
The categories of this paper are: dg-ga
21
The categories of this paper are: adap-org
1
The categories of this paper are: cs
27
The categories of this paper are: comp-gas
36
The categories of this paper are: cmp-lg
20
The categories of this paper are: acc-phys
30
The categories of this paper are: q-alg
37
The categories of this paper are: supr-con