Photoevaporation and spatial variation of grain sizes in Orion 114-426

Anna Miotello, Massimo Robberto, Marco A. C. Potenza +1

Deep HST broad-band images taken with ACS and WFPC2 of the giant ($\sim 1000$ AU diameter) dark silhouette proplyd 114-426 in the Orion Nebula show that this system is tilted, asym…