Cold Debris Disks around M-dwarfs
First Author:
Jean-Francois Lestrade
Email: jean-francois.lestrade AT obspm.fr
Observatoire de Paris - CNRS
77 av. Denfert Rochereau
75014 - Paris - France
Coauthors:
Wyatt, Mark C, Cambridge, UK
Bertoldi, Frank, University of Bonn
Menten, Karl, MPIfR
Labaigt, Gabriel, ENS
Abstract
We have conducted a search for cold debris disks around M-dwarfs at lambda= 1.2 mm by imaging the fields of more than 50 targets with the bolometer array MAMBO at the IRAM 30m radiotelescope. By combining with other recent surveys conducted with MIPS/Spitzer and SCUBA/JCMT, we establish that the detection rate of cold debris disks around M-dwarfs is 4.8 (+3.0/-2.6) %, which is lower than for solar and A-type dwarfs for the same level of sensitivity (fractional dust luminosity 10-5 - 10-4). We shall discuss mechanisms that may imped formation or survival of debris disks around M-dwarfs.
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