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Wind erosion is a destructive mechanism that completely dissolves a weaklybound object like a planetesimal into its constituent particles, if thevelocity relative to the ambient gas and the local gas pressure aresufficiently high. In numerical simulations we study the influence of such winderosion on pebble and planetesimal accretion by a planetary body up to $10R_\mathrm{Earth}$. Due to the rapid size reduction of an in-falling small body,the accretion outcome changes significantly. Erosion leads to a strong decreasein the accretion efficiency below a threshold size of the small body on theorder of 10 m. This slows down pebble accretion significantly for a given sizedistribution of small bodies. The threshold radius of the small body increaseswith increasing planet radius and decreases with increasing semi-major axis.Within the parameters studied, an additional planetary atmosphere (up to 1 bar)is of minor importance.

Accretion of eroding pebbles and planetesimals in planetary envelopes