Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: AKARI/IRC 18 Micron Survey of Warm Debris Disks   Context. Little is known about the properties of the warm (Tdust >~ 150 K)
debris disk material located close to the central star, which has a more direct
link to the formation of terrestrial planets than the low temperature debris
dust that has been detected to date. Aims. To discover new warm debris disk
candidates that show large 18 micron excess and estimate the fraction of stars
with excess based on the AKARI/IRC Mid-Infrared All-Sky Survey data. Methods.
We have searched for point sources detected in the AKARI/IRC All-Sky Survey,
which show a positional match with A-M dwarf stars in the Tycho-2 Spectral Type
Catalogue and exhibit excess emission at 18 micron compared to that expected
from the Ks magnitude in the 2MASS catalogue. Results. We find 24 warm debris
candidates including 8 new candidates among A-K stars. The apparent debris disk
frequency is estimated to be 2.8 +/- 0.6%. We also find that A stars and
solar-type FGK stars have different characteristics of the inner component of
the identified debris disk candidates --- while debris disks around A stars are
cooler and consistent with steady-state evolutionary model of debris disks,
those around FGK stars tend to be warmer and cannot be explained by the
steady-state model.

27
The categories of this paper are: comp-gas
33
The categories of this paper are: plasm-ph
11
The categories of this paper are: hep-lat
0
The categories of this paper are: hep-ph
34
The categories of this paper are: chem-ph
21
The categories of this paper are: adap-org
5
The categories of this paper are: gr-qc
19
The categories of this paper are: eess
4
The categories of this paper are: cond-mat
1
The categories of this paper are: cs
36
The categories of this paper are: cmp-lg
10
The categories of this paper are: q-bio
28
The categories of this paper are: alg-geom
22
The categories of this paper are: chao-dyn
31
The categories of this paper are: ao-sci
29
The categories of this paper are: funct-an