Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: A MAD Model for Gamma-Ray Burst Variability   We present a model for the temporal variability of long gamma-ray bursts
during the prompt phase (the highly variable first 100 seconds or so), in the
context of a magnetically arrested disk (MAD) around a black hole. In this
state, sufficient magnetic flux is held on to the black hole such that it
stalls the accretion near the inner region of the disk. The system transitions
in and out of the MAD state, which we relate to the variable luminosity of the
GRB during the prompt phase, with a characteristic timescale defined by the
free fall time in the region over which the accretion is arrested. We present
simple analytic estimates of the relevant energetics and timescales, and
compare them to gamma-ray burst observations. In particular, we show how this
model can reproduce the characteristic one second time scale that emerges from
various analyses of the prompt emission light curve. We also discuss how our
model can accommodate the potentially physically important correlation between
a burst quiescent time and the duration of its subsequent pulse (Ramirez-Ruiz &
Merloni 2001).

22
The categories of this paper are: chao-dyn
9
The categories of this paper are: nlin
26
The categories of this paper are: bayes-an
29
The categories of this paper are: funct-an
12
The categories of this paper are: nucl-th
30
The categories of this paper are: q-alg
1
The categories of this paper are: cs
31
The categories of this paper are: ao-sci
14
The categories of this paper are: math-ph
4
The categories of this paper are: cond-mat
10
The categories of this paper are: q-bio
36
The categories of this paper are: cmp-lg
21
The categories of this paper are: adap-org
35
The categories of this paper are: mtrl-th
8
The categories of this paper are: hep-ex
27
The categories of this paper are: comp-gas