WHERE ARE THE M DWARF DISKS OLDER THAN 10 MILLION YEARS?

We present 11.7 m observations of nine late-type dwarfs obtained at the Keck I 10 m telescope in 2002 December and 2003 April. Our targets were selected for their youth or apparent IRAS 12 m excess. For all nine sources, excess infrared emission is not detected.We find that stellar wind drag can dominate the circumstellar grain removal and plausibly explain the dearth of M dwarf systems older than 10 Myr with currently detected infrared excesses. We predict that M dwarfs possess fractional infrared excesses on the order of LIR/L 106 and that this may be detectable with future efforts. Subject headinggs: circumstellar matter — stars: late-type — stars: winds, outflow