Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Kepler super-flare stars: what are they?   The Kepler mission has led to the serendipitous discovery of a significant
number of `super flares' - white light flares with energies between 10^33 erg
and 10^36 erg - on solar-type stars. It has been speculated that these could be
`freak' events that might happen on the Sun, too. We have started a programme
to study the nature of the stars on which these super flares have been
observed. Here we present high-resolution spectroscopy of 11 of these stars and
discuss our results. We find that several of these stars are very young,
fast-rotating stars where high levels of stellar activity can be expected, but
for some other stars we do not find a straightforward explanation for the
occurrence of super flares.

9
The categories of this paper are: nlin
19
The categories of this paper are: eess
12
The categories of this paper are: nucl-th
11
The categories of this paper are: hep-lat
18
The categories of this paper are: econ
23
The categories of this paper are: solv-int
7
The categories of this paper are: hep-th
5
The categories of this paper are: gr-qc
8
The categories of this paper are: hep-ex
29
The categories of this paper are: funct-an
17
The categories of this paper are: q-fin
34
The categories of this paper are: chem-ph
22
The categories of this paper are: chao-dyn
33
The categories of this paper are: plasm-ph
36
The categories of this paper are: cmp-lg
37
The categories of this paper are: supr-con