Some additional criteria for asteroid family detection and confirmation of the effect of spatial separation by albedo for family members

1Kazantsev, AM, 1Kazantseva, LV
1Astronomical Observatory of Taras Shevchenko National University of Kyiv, Kyiv, Ukraine
Kinemat. fiz. nebesnyh tel (Online) 2014, 30(5):72-
Start Page: Dynamics and Physics of Solar System Bodies
Language: Russian

The distribution of asteroid sizes by semi-major axis, D(a), and the distribution of asteroid numbers by albedo values, N(p), ??for separate families are used for a more precise selection of asteroid families. On the basis of the distributions we analysed the families selected in [Masiero J. R. et al. // Astrophys. J.—2013.—770, N 1.—P. 22] and determined which families were selected correctly or incorrectly. Some decrease of the mean albedo with semi-major axis increasing is observed almost for all of the correctly selected families which are not truncated by resonances. For most of them the decrease is statistically plausible. No family is detected at a plausible increase of albedo. This confirms our previous conclusion on the existence of a non-gravitational effect in the asteroid belt which causes a spatial separation of asteroids with different albedos.

Keywords: albedo, asteroids

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