B. Gundlach, J. Blum, Yu. V. Skorov, H. U. Keller
In this work, a novel approach to explain the survival of sungrazing comets within the Roche limit is presented. It is shown that the reaction force caused by the sublimation of the icy constituents can prevent tidal splitting of cometary nuclei, even if the tensile strength of the material is low. Furthermore, this approach is used to estimate the maximum size of the nucleus of comet C/2011 W3 (Lovejoy) during perihelion.
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http://arxiv.org/abs/1203.1808
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