Where Are The M Dwarf Disks Older Than 10 Million Years?
Astrophysics
2009-11-11 v1
Abstract
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 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 M dwarfs possess fractional infrared excess on the order of L_{IR}/L_{*}\sim10^{-6} and this may be detectable with future efforts.
Keywords
Cite
@article{arxiv.astro-ph/0506132,
title = {Where Are The M Dwarf Disks Older Than 10 Million Years?},
author = {Peter Plavchan and M. Jura and S. J. Lipscy},
journal= {arXiv preprint arXiv:astro-ph/0506132},
year = {2009}
}
Comments
24 pages, 2 figures, accepted to ApJ