Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: A near-infrared interferometric survey of debris-disk stars. VI.
  Extending the exozodiacal light survey with CHARA/JouFLU   We report the results of high-angular-resolution observations that search for
exozodiacal light in a sample of main sequence stars and sub-giants. Using the
"jouvence" of the fiber linked unit for optical recombination (JouFLU) at the
center for high angular resolution astronomy (CHARA) telescope array, we have
observed a total of 44 stars. Out of the 44 stars, 33 are new stars added to
the initial, previously published survey of 42 stars performed at CHARA with
the fiber linked unit for optical recombiation (FLUOR). Since the start of the
survey extension, we have detected a K-band circumstellar excess for six new
stars at the ~ 1\% level or higher, four of which are known or candidate
binaries, and two for which the excess could be attributed to exozodiacal dust.
We have also performed follow-up observations of 11 of the stars observed in
the previously published survey and found generally consistent results. We do
however detect a significantly larger excess on three of these follow-up
targets: Altair, $\upsilon$ And and $\kappa$ CrB. Interestingly, the last two
are known exoplanet host stars. We perform a statistical analysis of the JouFLU
and FLUOR samples combined, which yields an overall exozodi detection rate of
$21.7^{+5.7}_{-4.1}\%$. We also find that the K-band excess in FGK-type stars
correlates with the existence of an outer reservoir of cold ($\lesssim 100\,$K)
dust at the $99\%$ confidence level, while the same cannot be said for A-type
stars.

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The categories of this paper are: cond-mat
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The categories of this paper are: atom-ph
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The categories of this paper are: q-fin
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The categories of this paper are: q-bio
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The categories of this paper are: alg-geom
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The categories of this paper are: hep-ph
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The categories of this paper are: hep-lat
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The categories of this paper are: gr-qc
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The categories of this paper are: chao-dyn
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The categories of this paper are: ao-sci
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The categories of this paper are: adap-org
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The categories of this paper are: dg-ga
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The categories of this paper are: comp-gas
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The categories of this paper are: nucl-th
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The categories of this paper are: eess
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The categories of this paper are: chem-ph