New M Dwarf Debris Disks Discovered with the Spitzer Space Telescope

Details New M Dwarf Debris Disks Discovered with the Spitzer Space Telescope New M Dwarf Debris Disks Discovered with the Spitzer Space Telescope

May 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009aas...21430105p&link_type=abstract

American Astronomical Society, AAS Meeting #214, #301.05; Bulletin of the American Astronomical Society, Vol. 41, p.714

Astronomy and Astrophysics

Astronomy

Scientific paper

M dwarfs constitute 70% of the stars in our local neighborhood, yet we know little about the frequency and evolution of planetary systems for this diverse spectral class. Among the numerous M dwarfs sampled by Spitzer in the nearest 25pc, AU Mic remains a unique M dwarf with its debris disk, infrared excess, 12Myr age, flaring, and X-ray activity. We present results from 24 micron and 70 micron MIPS (Multiband Imaging Photometer for Spitzer) observations of 27 X-ray saturated M dwarfs like AU Mic out to an average distance of 30 pc. From these initial observations, we have discovered 3 new M dwarf debris disks identifiable from their infrared flux excess. We place our results in context with a sample of 70 A through M-type dwarfs selected with common youth indicators such as lithium abundance, moving group membership, chromospheric activity, and rapid rotation.

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