Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Searching for IR excesses in Sun-like stars observed by WISE   We present the results of a search of infrared excess candidates in a
comprehensive (29\,000 stars) magnitude limited sample of dwarf stars, spanning
the spectral range F2-K0, and brighter than V$=$15 mag. We searched the sample
within the {\em WISE} all sky survey database for objects within 1 arcsecond of
the coordinates provided by SIMBAD database and found over 9\,000 sources
detected in all {\em WISE} bands. This latter sample excludes objects that are
flagged as extended sources and those images which are affected by various
optical artifacts. For each detected object, we compared the observed W4/W2
(22$\mu$m/4.6$\mu$m) flux ratio with the expected photospheric value and
identified 197 excess candidates at 3$\sigma$. For the vast majority of
candidates, the results of this analysis represent the first reported evidence
of an IR excess. Through the comparison with a simple black-body emission
model, we derive estimates of the dust temperature, as well as of the dust
fractional luminosities. For more than 80% of the sample this temperature is
higher than 120 K, suggesting the presence of warm circumstellar dust.
Complementary observations at longer wavelengths (far-IR and sub-mm) are
required for better characterising and explaining the origin of this emission.

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The categories of this paper are: supr-con
5
The categories of this paper are: gr-qc
17
The categories of this paper are: q-fin
31
The categories of this paper are: ao-sci
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The categories of this paper are: cmp-lg
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The categories of this paper are: dg-ga
13
The categories of this paper are: quant-ph
1
The categories of this paper are: cs
14
The categories of this paper are: math-ph
7
The categories of this paper are: hep-th
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The categories of this paper are: eess
4
The categories of this paper are: cond-mat
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The categories of this paper are: adap-org
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The categories of this paper are: mtrl-th
29
The categories of this paper are: funct-an
0
The categories of this paper are: hep-ph