Measurement of the Top Quark Properties with the ATLAS Detector

The top quark, discovered at the Tevatron in 1995 by both CDF and DØ collaborations, is the heaviest known particle. The measurement of its properties are of interest to the understanding of the strong and weak forces, as well as searches for physics beyond the standard Model. Several measurements of top quark properties are presented using data collected at the ATLAS experiment at $\sqrt{s} = 7$ TeV centre-of-mass energy. The measurements include top quark polarisation, spin correlation, production of $t\bar{t}Z$ and $t\bar{t}\gamma$, as well as top mass and $Wtb$ vertex measurements in both the lepton + jets and dilepton channel. The measurement of the $Wtb$ vertex fractions is the most precise measurement ever made.