Oral title: DARTTS-S: TTauri Disks in scattered light with SPHERE/IRDIS

Oral abstract: In order to understand planet formation, it is crucial to understand the environment planets form in. 
However, the focus so far has been on Herbig Ae/Be stars, while the progenitors of solar-system like environments, 
TTauri stars, have received significantly less attention, partly due to observational challenges. However, instruments like 
VLT/SPHERE are significantly more capable in terms of observations of faint sources than the previous generation.

Building on these capabilities, we have started to perform a uniform, diffraction-limited (~50 mas) survey of TTauri stars in 
scattered light, within the framework of the DARTTS-S program (Disks ARound TTauri Stars with SPHERE, PI: Henning 
Avenhaus). We have acquired data for a total of 29 TTauri disks, with detections for almost two thirds of our targets. 
While the investigation of this large sample is still on-going, several key results have been obtained already. In my talk, I 
will present some of our results, focusing on the first sample of 8 bright disks (IM Lup, RU Lup, MY Lup, V4046 Sgr, DoAr 
44, RX J1615-3255, AS 209, and PDS 66), and show which kinds of previously unfeasible analysis can be performed with 
such a large, high-resolution and high-SNR sample of scattered light datasets.

Our program is accompanied by DARTTS-A (Disks ARound TTauri Stars with ALMA, PI: Sebastian Perez), which aims to 
acquire sub-mm continuum and 12CO data at comparable resolution for these disks.