Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Statistical analysis on X-ray flares from the nucleus and HST-1 knot in
  the M87 jet   The statistical properties of X-ray flares from two separate locations
(nucleus and HST-1) in the M87 jet are investigated to reveal the physical
origin of the flares. We analyse the archival \textit{Chandra} data for M87,
and identify 14 flares in the nucleus and 9 flares in HST-1. The peak intensity
($I_{\rm{P}}$) and the flaring duration time ($T_{\rm{fl}}$) for each flare are
obtained. It is found that the distributions of both $I_{\rm{P}}$ and
$T_{\rm{fl}}$ for the nucleus obey a power-law form with a similar index. A
similar result is also obtained for HST-1, and no significant inconsistency
between the nucleus and HST-1 is found for the indices. Similar to solar X-ray
flares, the power-law distributions of the flare event parameters can be well
explained by a self-organized criticality (SOC) system, which are triggered by
magnetic reconnection. Our results suggest that the flares from nucleus and
HST-1 are possibly triggered by magnetic reconnection process. The consistent
indices for the distributions of $I_{\rm{P}}$ and $T_{\rm{fl}}$ in the CORE and
HST-1 indicate that the dimensions of the energy dissipation of the magnetic
reconnection is identical in the two regions. A strong correlation between the
flares in the two regions also suggests a similar physical origin for the
flares.

33
The categories of this paper are: plasm-ph
15
The categories of this paper are: nucl-ex
20
The categories of this paper are: acc-phys
19
The categories of this paper are: eess
16
The categories of this paper are: stat
1
The categories of this paper are: cs
17
The categories of this paper are: q-fin
12
The categories of this paper are: nucl-th
26
The categories of this paper are: bayes-an
28
The categories of this paper are: alg-geom
37
The categories of this paper are: supr-con
14
The categories of this paper are: math-ph
29
The categories of this paper are: funct-an
21
The categories of this paper are: adap-org
24
The categories of this paper are: dg-ga
34
The categories of this paper are: chem-ph