Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Dramatic Changes in the Outburst Properties in V503 Cygni   We examined the VSNET light curve of the unusual SU UMa-type dwarf nova V503
Cyg which is known to show a short (89 d) supercycle length and exceptionally
small (a few) normal outbursts within a supercycle. In 1999-2000, V503 Cyg
displayed frequent normal outbursts with typical recurrence times of 7-9 d. The
behavior during this period is characteristic to an usual SU UMa-type dwarf
nova with a short supercycle length. On the other hand, V503 Cyg showed very
infrequent normal outbursts in 2001-2002. Some of the superoutbursts during
this period were observed shorter than usual. The remarkable alternations of
the outbursting states in V503 Cyg support the presence of mechanisms of
suppressing normal outbursts and premature quenching superoutbursts, which have
been proposed to explain some unusual SU UMa-type outbursts. The observed
temporal variability of the suppressing/quenching mechanisms in the same object
suggests that these mechanisms are not primarily governed by a fixed system
parameter but more reflect state changes in the accretion disk.

29
The categories of this paper are: funct-an
28
The categories of this paper are: alg-geom
37
The categories of this paper are: supr-con
20
The categories of this paper are: acc-phys
24
The categories of this paper are: dg-ga
8
The categories of this paper are: hep-ex
11
The categories of this paper are: hep-lat
18
The categories of this paper are: econ
30
The categories of this paper are: q-alg
14
The categories of this paper are: math-ph
7
The categories of this paper are: hep-th
12
The categories of this paper are: nucl-th
13
The categories of this paper are: quant-ph
22
The categories of this paper are: chao-dyn
32
The categories of this paper are: atom-ph
15
The categories of this paper are: nucl-ex