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State-of-the-art surveys reveal that most massive stars in the universeevolve in close binaries. Massive stars in such systems are expected to developaspherical envelopes due to tidal interactions and/or rotational effects.Recently, it was shown that point explosions in oblate stars can producerelativistic equatorial ring-like outflows. Moreover, since stripped-envelopestars in binaries can expand enough to fill their Roche lobes anew, it islikely that these stars die with a greater degree of asphericity than theoblate spheroid geometry previously studied. We investigate the effects of thisasymmetry by studying the gas dynamics of axisymmetric point explosions instars in various stages of filling their Roche lobes. We find that pointexplosions in these pear-shaped stars produce trans-relativistic ejecta thatcoalesces into bullets pointed both toward and away from the binary companion.We present this result and comment on key morphological differences betweencore-collapse explosions in spherical versus distorted stars in binary systems,effects on gravitational wave sources, and observational signatures that couldbe used to glean these explosion geometries from current and future surveys.

Explosions in Roche-Lobe Distorted Stars: Relativistic Bullets in Binaries