Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Outbursts in two new cool pulsating DA white dwarfs   The unprecedented extent of coverage provided by Kepler observations recently
revealed outbursts in two hydrogen-atmosphere pulsating white dwarfs (DAVs)
that cause hours-long increases in the overall mean flux of up to 14%. We have
identified two new outbursting pulsating white dwarfs in K2, bringing the total
number of known outbursting white dwarfs to four. EPIC 211629697, with T_eff =
10,780 +/- 140 K and log(g) = 7.94 +/- 0.08, shows outbursts recurring on
average every 5.0 d, increasing the overall flux by up to 15%. EPIC 229227292,
with T_eff = 11,190 +/- 170 K and log(g) = 8.02 +/- 0.05, has outbursts that
recur roughly every 2.4 d with amplitudes up to 9%. We establish that only the
coolest pulsating white dwarfs within a small temperature range near the cool,
red edge of the DAV instability strip exhibit these outbursts.

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The categories of this paper are: solv-int
18
The categories of this paper are: econ
25
The categories of this paper are: patt-sol
32
The categories of this paper are: atom-ph
14
The categories of this paper are: math-ph
31
The categories of this paper are: ao-sci
33
The categories of this paper are: plasm-ph
20
The categories of this paper are: acc-phys
30
The categories of this paper are: q-alg
36
The categories of this paper are: cmp-lg
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The categories of this paper are: cond-mat
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The categories of this paper are: chao-dyn
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The categories of this paper are: mtrl-th
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The categories of this paper are: funct-an
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The categories of this paper are: adap-org
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The categories of this paper are: comp-gas