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Fig. 1

image

Variation of χ2 with radius R of the body and birth time tb for fixed thickness d of the outer impact-damaged layer. Left part: shape of the χ2 surface. Alsoshown are contour lines of constant values of χ2 on the χ2 surface and their projection onto the basis plane. Right part: contour lines of χ2 in the R-tb plane.

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