Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Hints of correlation between broad-line and radio variations for 3C 120   In the paper, we investigate correlation between broad-line and radio
variations for broad-line radio galaxy 3C 120. By the z-transformed discrete
correlation function method and the model-independent flux randomization/random
subset selection (FR/RSS) Monte Carlo method, we find that the broad Hbeta line
variations lead the 15 GHz variations. The FR/RSS method shows that the Hbeta
line variations lead the radio variations by a factor of tau_{ob}=0.34 +/- 0.01
yr. This time lag can be used to locate the position of emitting region of
radio outbursts in jet, on the order of ~ 5 light-years, from the central
engine. This distance is much larger than the size of broad-line region. The
large separation of the radio outburst emitting region from the broad-line
region will observably influence the gamma-ray emission in 3C 120.

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The categories of this paper are: comp-gas
19
The categories of this paper are: eess
17
The categories of this paper are: q-fin
0
The categories of this paper are: hep-ph
30
The categories of this paper are: q-alg
25
The categories of this paper are: patt-sol
14
The categories of this paper are: math-ph
8
The categories of this paper are: hep-ex
4
The categories of this paper are: cond-mat
7
The categories of this paper are: hep-th
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The categories of this paper are: dg-ga
2
The categories of this paper are: math
16
The categories of this paper are: stat
5
The categories of this paper are: gr-qc
20
The categories of this paper are: acc-phys
15
The categories of this paper are: nucl-ex