Search for cold debris disks around M-dwarfs

2006/09/20 by J.-F. Lestrade, J. -F. Lestrade, M. C. Wyatt +3 · 3 citations
Physics and Astronomy · #Astronomy #Astronomy and Astrophysical Research #Astrophysics #Astrophysics and Star Formation Studies #Brown dwarf #Debris #Debris disk #Physics #Planet #Planetary system #Planetesimal #Star formation #Stars #Stellar classification #Stellar, planetary, and galactic studies #astro-ph

paper · pdf · doi:10.1051/0004-6361:20065873

A&A accepted on 15 september 2006

arxiv created 2006/09/20 · openalex publication_date 2006/09/26 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05

Abstract

Debris disks are believed to be related to planetesimals left over around stars after planet formation has ceased. The frequency of debris disks around M-dwarfs which account for 70% of the stars in the Galaxy is unknown while constrains have already been found for A- to K-type stars. We have searched for cold debris disks around 32 field M-dwarfs by conducting observations at m with the SCUBA bolometer array camera at the JCMT and at mm with the MAMBO array at the IRAM 30-m telescopes. This is the first survey of a large sample of M-dwarfs conducted to provide statistical constraints on debris disks around this type of stars. We have detected a new debris disk around the M0.5 dwarf GJ 842.2 at m, providing evidence for cold dust at large distance from this star (~300 AU). By combining the results of our survey with the ones of Liu et al. (2004), we estimate for the first time the detection rate of cold debris disks around field M-dwarfs with ages between 20 and 200 Myr. This detection rate is and is consistent with the detection rate of cold debris disks (9–23%) around A- to K-type main sequence stars of the same age. This is an indication that cold disks may be equally prevalent across stellar spectral types.

Citations

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Cited by

• New M Dwarf Debris Disk Candidates in NGC 2547
• THE TUCANA/HOROLOGIUM, COLUMBA, AB DORADUS, AND ARGUS ASSOCIATIONS: NEW MEMBERS AND DUSTY DEBRIS DISKS
• On the steady state collisional evolution of debris disks around M dwarfs