IRS Characterization of a Debris Disk around a 25 Myr M-type Star

Details IRS Characterization of a Debris Disk around a 25 Myr M-type Star IRS Characterization of a Debris Disk around a 25 Myr M-type Star

Jun 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005sptz.prop20750l&link_type=abstract

Spitzer Proposal ID #20750

Computer Science

Scientific paper

Spitzer IRAC and MIPS observations of the 25 Myr old stellar cluster NGC 2547 has provided us with an initial census of the disk population in the cluster. Only 5% show some excess emission in the IRAC bands suggestive of the presence of primordial or protoplanetary disks, although no excess emission is detected at near-infrared wavelengths for these sources. MIPS observations has provided us with the discovery of a late-type star with a considerable 24um excess emission. This suggests the star possesses a debris disk with an inner hole since negligible IRAC excess emission is measured. Spectra has identified this star as being of spectral type M4.5 and we have begun modeling the SED and estimate the disk mass. We wish to further study this particular disk with IRS to characterize its structure and composition, and ultimately, add to the scare observational knowledge on debris disks around late-type stars.

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