Asteroid families: observational results versus numerical simulations

Details Asteroid families: observational results versus numerical simulations Asteroid families: observational results versus numerical simulations

Aug 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003basbr..23q.239d&link_type=abstract

Boletim da Sociedade Astronômica Brasileira (ISSN 0101-3440), vol.23, no.1, p. 239-239

Astronomy and Astrophysics

Astronomy

Scientific paper

Asteroids families are groups of small bodies that share certain orbital and spectral properties. Families are concentrations in the proper elements phase space. It is believed that they are the result of energetic collisions that break-up and disperse the original parent bodies. In this presentation we compare the rotational periods of family members measured by observations made in Observatorio Pico dos Dias, Estacion Astrofisica Bosque Alegre and Casleo observatories to the rotational periods resulting from simulations of the collisional breakup of a rubble pile asteroid using a model recently developed by us. We used the observed light curves of asteroids members of the Maria and Themis families to estimate the period and shape of each object. Themis and Maria families have around 300 and 150 members, respectively. Our observation consist of 10 members of the Maria Family and 12 from Themis family, adding this to the data from the literature we have a data set of 33 objects for Themis and 20 for Maria. The estimated shapes of the objects are fed into the model in order to obtain a distribution of rotational periods after break-up. This distribution is then compared to the observed distribution. The observed and simulated distributions show some differences due to the fact that the observed distribution were affected by the subsequent collisional evolution of the family after its formation, but overall shapes are comparable.

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