Title:Image synthesis of HD100546 using Sparse Aperture Masking on the VLT

Abstract:
HD100546 is a system of a Herbig Ae/Be star surrounded by a circumstellar disk. 
From SED and line profiles observations and modeling, is expected that the disk 
has a zone with a decrement of the gas and dust density, what is called gap. 
This structure divide the disk in a inner part and a external part. The 
existence of this gap is probably due to planet formation and the gap has not 
been observed in optical images.

A observation at 3.81 [um] of HD100546, using Sparse Aperture Masking (SAM) at 
NAOS/CONICA on the VLT, was made in 2012. Using a software named MIRA for image 
reconstruction for optical interferometry, written by Éric Thiébaut, we think 
that we detected the gap using different regularization methods. We found a gap 
in the disk at a radius of ~10 AU (consistent with the literature).