Measurements of azimuthal anisotropies in $^{16}$O+$^{16}$O and $\gamma$+Au collisions from STAR

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In this proceeding, we present the first measurements of azimuthal anisotropies, $v_2$ and $v_3$, in $^{16}$O+$^{16}$O collisions at 200 GeV as a function of transverse momentum and multiplicity, by using two- and four-particle correlation methods.

• We compare our measurements with STAR measurements of $v_n$ in \dau and \heau collisions to provide insight into the impact of system symmetry on initial condition for small systems.
• We also investigate the ratio $v_2\{4\}/v_2\{2\}$ as a function of centrality, which is expected to be sensitive to nucleon-nucleon correlation in the $^{16}$O nucleus.