Recent highlights from the ATLAS heavy-ion program

These proceedings report on recent measurements performed by with ATLAS Detector at the LHC presented at the Quark Matter 2015 Conference. These include measurements of two-particle correlations in $pp$ collisions at $\sqrt{s}=2.76$ and 13 TeV. These results are the first to show a second harmonic modulation in the azimuthal dependence of the particle yields in $pp$ collisions, a signature closely associated with collective flow in ion-ion collisions. Measurements of $p$+Pb collisions at $\sqrt{s_{\mathrm{NN}}}=5.02$ TeV are presented including charged particle multiplicities, Bose-Einstein correlations and yields of jets and electroweak bosons that provide insight into the initial stages of these collisions including the nuclear geometry. Finally, measurements of dijet asymmetry and jet structure in Pb+Pb and $pp$ collisions at $\sqrt{s_{\mathrm{NN}}}=2.76$ TeV are presented that further illuminate the phenomenon of partonic energy loss.