Some considerations on cohesive forces in sun-grazing comets

Details Some considerations on cohesive forces in sun-grazing comets Some considerations on cohesive forces in sun-grazing comets

Publishing date

Dec 1989

URL

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989esasp.302..197k&link_type=abstract

Journals

In ESA, Physics and Mechanics of Cometary Materials p 197-200 (SEE N90-19989 12-90)

Science

Physics

Additional info 2

4

Additional info 3

Cohesion, Comet Nuclei, Comets, Grazing Incidence, Sun, Tensile Strength, Core Sampling, European Space Programs, Residual Strength, Return To Earth Space Flight

Type

Scientific paper

Abstract

Using a theory developed by Aggarwal and Oberbeck (1974) on tidal disruption of rigid bodies, an estimate is given for the internal cohesion of prominent Sun-grazers. Considering the comet as a fluffy body, requirements are set on the tensile strength of the matrix material. The resistance against tidal disruption of Sun-grazing cometary bodies is compatible with a fluffy texture of the nucleus considered as an aggregate of small particles glued together by cold ices or cold hydrocarbons. If the material properties of the surface layers of short period comets are similar to the properties of the deep layers of Sun-grazers, then achoring and sampling procedures for the Rosetta mission are predicted to have good chances of success.

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