Even Less Gas in the AU Mic Debris Disk
First Author:
Alexis Brandeker
Email: alexis AT astro.su.se
Stockholm Observatory
Dept. of Astronomy, Stockholm University
SE-106 91 Stockholm, Sweden
Coauthors:
Jayawardhana, Ray, University of Toronto
Abstract
AU Microscopii is a member of the beta Pictoris moving group with an edge-on debris disk similar to the one around beta Pictoris. While circumstellar gas has been detected around beta Pictoris, none has so far been found around AU Mic. We here present a high spectral resolution (R ~150000) search for circumstellar absorption of Ca I and Ca II against AU Mic, using bHROS at Gemini South. No absorption is found, implying an upper limit of gaseous Ca ~1000 times lower than previous best estimates.
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