Additional criteria for identifying the asteroid families and confirmation of the effect of spatial separation of family members according to their albedos |
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| Authors: | A M Kazantsev L V Kazantseva |
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| Institution: | 1. Astronomical Observatory, Shevchenko National University of Kyiv, ul. Observatornaya 3, Kyiv, 04053, Ukraine
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| Abstract: | The D(a) distribution of asteroid sizes by their semimajor axes and the N(p) distribution of the number of asteroids by their albedo values for individual families are used to isolate the asteroid families more clearly. The families identified by Masiero et al. (2013) are analyzed with the use of these distributions, and correctly and incorrectly isolated families are found. A reduction in the mean albedo with increasing semimajor axis is observed for almost all correctly identified families that are not truncated by resonances. This reduction is statistically significant for the majority of these families. Not a single family exhibits a statistically significant increase in albedo. This confirms our previous conclusions that a nongravitational effect acting in the asteroid belt results in the spatial separation of asteroids with different albedos. |
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