6
Vega :
350 Myrs
850
m
m dust emission
1.3 mm dust emission
IRAM + dust ring model
ring arc at 95 AU radius
like Neptune-Galatea arcs?
particles confined by planet?
Resonant interaction with Galatea (Tremaine, Baudry & Goldreich confines azimuthally. Holland et al -> mass of dust a few lunar masses so planets already formed. Neptune at 30 AU. 90 AU ~ 90x 90 = 8 Billion miles
