Main-Sequence Circumstellar Debris Disks in the Spitzer Galactic First Look Survey

Details Main-Sequence Circumstellar Debris Disks in the Spitzer Galactic First Look Survey Main-Sequence Circumstellar Debris Disks in the Spitzer Galactic First Look Survey

May 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004aas...204.6205f&link_type=abstract

American Astronomical Society Meeting 204, #62.05; Bulletin of the American Astronomical Society, Vol. 36, p.773

Astronomy and Astrophysics

Astronomy

1

Scientific paper

We searched for infrared excess emission from debris disks around main-sequence stars observed with Spitzer in the Galactic First Look Survey. The spectral energy distributions of observed main-sequence stars were constructed from 2MASS J, H, Ks, IRAC 3.6, 4.5, 5.8, 8.0 μ m, and MIPS 24 μ m photometry. We report on the frequency of occurrence of infrared excess emission at 24 μ m, likely an indicator of the Vega phenomenon or the presence of circumstellar dust at temperatures of ˜ 100 K or higher. We also searched for much hotter dust, at temperatures at or above those of terrestrial material, emitting at the IRAC wavelengths. This hotter dust was a particular challenge for Spitzer, as its occurrence is extremely rare and its emission peaks at 10 μ m, where our survey has no data.
This work is based on observations made with the Spitzer Space Telescope, which is operated by JPL, Caltech under NASA contract 1407.

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