Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: First detection of the growing humps at the rapidly rising stage of
  dwarf novae AL Com and WZ Sge   We report on time-series photometric observations in the earliest stages of
superoutbursts of the extreme dwarf novae, AL Com and WZ Sge, which started on
2001 May after the 6 years quiescence and on 2001 July after the 23 years
quiescence, respectively. We detected growth of ``early superhumps'' during the
each rising stage. Our observations reject the mass transfer instability for
the trigger of the superoutburst of WZ Sge stars, and show the existence of
some relations between the ``early superhumps'' and the spiral structure, which
give a hint of the origin of the ``early superhumps.''

15
The categories of this paper are: nucl-ex
30
The categories of this paper are: q-alg
36
The categories of this paper are: cmp-lg
35
The categories of this paper are: mtrl-th
18
The categories of this paper are: econ
20
The categories of this paper are: acc-phys
16
The categories of this paper are: stat
3
The categories of this paper are: physics
37
The categories of this paper are: supr-con
4
The categories of this paper are: cond-mat
1
The categories of this paper are: cs
24
The categories of this paper are: dg-ga
22
The categories of this paper are: chao-dyn
7
The categories of this paper are: hep-th
29
The categories of this paper are: funct-an
19
The categories of this paper are: eess