Poster title: The CT Cha system – reevaluation of the sub-stellar companion and the disk

Abstract: CT Cha is with about 2 Myr of age one of the youngest systems in which a companion at the deuterium-burning 
limit was found. We combine new data taken from several observatories and instruments in addition to the original 
discovery data to reevaluate the nature of the sub-stellar companion based on longer wavelength coverage.

Among the properties of the co-moving companion, the different indications for accretion on the sub-stellar companion, 
…, we focus on the disk around the star, now confirmed by several observatories and its properties as well as the SEDs 
of star and companion.