The Debris Disk Fraction for M-dwarfs in Nearby, Young, Moving Groups

Abstract

I present the first substantial work to measure the fraction of debris disks for M-dwarfs in nearby moving groups (MGs). Utilising the $AllWISE$ IR catalog, 17 out of 151 MG members are found with an IR photometric excess indicative of disk structure. The M-dwarf debris disk fraction is $\lesssim 6$ per cent in MGs younger than 40\,Myr, and none are found in the groups older than 40\,Myr. Simulations show, however, that debris disks around M-dwarfs are not present above a $WISE$ $W1-W4$ colour of $\sim 2.5$, making calculating the absolute disk fractions difficult. The debris disk dissipation timescale appears to be faster than for higher-mass stars, and mechanisms such as enhanced stellar wind drag and/or photoevaporation could account for the more rapid decline of disks observed amongst M-dwarfs.

4 pages, 1 table, 1 figure. To be submitted in the IAU 314 symposium proceedings

References in corpus (3)

• BANYAN. II. Very Low Mass and Substellar Candidate Members to Nearby, Young Kinematic Groups With Previously Known Signs of Youth
• A Sensitive Identification of Warm Debris Disks in the Solar Neighborhood Through Precise Calibration of Saturated WISE Photometry
• New M dwarf debris disk candidates in NGC 2547

Cited by in corpus (1)

• The Statistics of Extended Debris Disks Measured with Gaia and Planck