Where are the M Dwarf Exo-Zodiacal Disks?

Astronomy and Astrophysics – Astronomy

Scientific paper

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Scientific paper

We present 11.7-micron observations of nine late-type dwarfs obtained at the Keck I 10-meter telescope in December 2002 and April 2003. Our targets were selected for their youth or apparent IRAS 12-micron excess. For all nine sources, excess infrared emission is not detected. We find that stellar wind drag can easily dominate the circumstellar grain removal and plausibly explain the dearth of M Dwarf systems with infrared excesses.

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