Title: The dust content of a Yellow Hypergiant: the Fried Egg nebula

Authors: Eric Lagadec, Julien Girard, Dimitri Mawet, Albert Zijlstra, Rene Oudmaijer, Ryszard Szczerba

Abstract:

Yellow Hypergiants are massive evolved stars, on their way to exploding as supernovae, characterised by short evolutionary 
timescales and copious mass loss. Only few such objects are known. IRAS 17163 was very recently identified as the closest 
Yellow Hypergiant by Lagadec et al (2011). 
Mid- IR imaging with VISIR/VLT probed the morphology of the circumstellar envelope and revealed the presence of a double 
detached shell structure of 5 arcsec, providing evidence for non quiescent ejection of material with a timescale of the order of 
400 years and a total circumstellar mass larger than 4 Msun . We present here NACO K and L band observations toward this 
source, showing the presence of hot dust between the shells observed by VISIR.