Authors: Corinne Morrell (LASP, University of Colorado Boulder), Mark P. Rast (LASP, University of Colorado Boulder), Shah Mohammad Bahauddin (LASP, Independent University Bangladesh), Ivan Milic (KIS)

Solar acoustic oscillations are thought to be stochastically excited by two distinct physical processes: turbulent Reynolds stresses and localized entropy fluctuations. However, the depth distribution of acoustic source events, the temporal phasing of the thermodynamic and dynamic variables, and the coupling efficiencies of each excitation mechanism to the global modes are not yet fully understood. Identifying individual source events in observations is an important step towards constraining these processes. In this work, we identify a local wavefront propagating across a granule away from an acoustic source in a MURaM radiative MHD simulation using temporal difference filtering. We use the SNAPI inversion code to synthesize three photospheric Fe lines and analyze the temperature response functions, in combination with the wave-induced temperature perturbations in the MURaM simulation, to determine which wavelengths in the spectrum are most sensitive to the wavefront passage. Our analysis shows that these wavelengths begin in the blue wing of each line at the onset of the wave event and drift towards line center as the wavefront propagates upwards through the lower solar atmosphere. We use these results to suggest two possible observing strategies for detecting local acoustic wavefronts with DKIST/VTF.