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A number of stellar astrophysical phenomena, such as tidal novae andplanetary engulfment, involve sudden injection of sub-binding energy in a thinlayer within the star, leading to mass ejection of the stellar envelope. We usea 1D hydrodynamical model to survey the stellar response and mass loss forvarious amounts ($E_{\mathrm{dep}}$) and locations of the energy deposition. Wefind that the total mass ejection has a nontrivial dependence on$E_{\mathrm{dep}}$ due to the varying strengths of mass ejection events, whichare associated with density/pressure waves breaking out from the stellarsurface. The rapid occurrence of multiple breakouts may present a uniqueobservational signature for sudden envelope heating events in stars.

Mass Ejection Driven by Sudden Energy Deposition in Stellar Envelopes