Characterizing Warm Debris Around Main Sequence Stars

Details Characterizing Warm Debris Around Main Sequence Stars Characterizing Warm Debris Around Main Sequence Stars

May 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007sptz.prop40651h&link_type=abstract

Spitzer Proposal ID #40651

Computer Science

Scientific paper

We propose to obtain Spitzer IRS spectroscopy of 104 main-sequence stars with infrared excess detected with SpitzerMIPS or IRAS. 74 objects possess MIPS 24 micron or IRAS 25 micron excess generated by warm dust with temperatures (T~230 K) similar to that found in our asteroid belt. IRS spectroscopy is needed to measure the 5 - 35 micron spectral energy distribution (SED), to constrain the spatial distribution of the dust and to search for solid state emission features that may reveal grain composition. 30 of our targets have MIPS 70 micron or IRAS 60 micron excess, but no evident shorter wavelength excess. Are there detectable differences between dust produced from cold reservoirs (analogous to the Kuiper belt) and dust produced from warm reservoirs (analogous to the asteroid belt). We propose to double the number warm-dust systems observed with SpitzerIRS and increases the total number of debris disks observed by ~40%.

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