@Article{CarrubaSpBaAlFaMa:2020:PoRoFi,
               author = "Carruba, Valerio and Spoto, Federica and Barletta, W. and Aljbaae, 
                         Safwan and Fazenda, A. L. and Martins, B.",
          affiliation = "{Universidade Estadual Paulista (UNESP)} and {Universit{\'e} de 
                         la C{\^o}te d’Azur} and {Universidade Estadual Paulista (UNESP)} 
                         and {Instituto Nacional de Pesquisas Espaciais (INPE)} and 
                         {Universidade Federal de S{\~a}o Paulo (UNIFESP)} and 
                         {Universidade Estadual Paulista (UNESP)}",
                title = "The population of rotational fission clusters inside asteroid 
                         collisional families",
              journal = "Nature Astronomy",
                 year = "2020",
               volume = "4",
               number = "1",
                pages = "83--88",
                month = "Jan.",
             abstract = "Asteroid families are groups of objects sharing similar orbits. 
                         They are mostly the results of past collisions between two 
                         asteroids. Recent studies have shown that some asteroid families 
                         can also be the outcome of the spin-up-induced fission of a 
                         critically rotating parent body (fission clusters). In at least 
                         four young fission clusters, more than 5% of their members belong 
                         to subfamilies, secondary clusters of objects mostly formed after 
                         the main fission event. However, asteroidal subfamilies are still 
                         not well characterized. In this work, using family recognition 
                         methods based on time-reversal dynamical simulations, 
                         machine-learning clustering algorithms and the exceptional orbit 
                         accuracy obtained from Gaia observations of Solar System objects, 
                         we identify several subclusters within four extremely young 
                         collisional families. We find that collisional asteroid families 
                         younger than 100 Myr have a higher fraction of young detectable 
                         fission subclusters with respect to older groups. The collisional 
                         events that form asteroid families may trigger a subsequent 
                         cascade of spin-induced formations of fission clusters by 
                         producing fragments in highly rotating states. Asteroid families 
                         created by collisions in the last ~100 Myr have a higher fraction 
                         of subfamilies than older ones. The impact produces highly 
                         rotating fragments that generate such subfamilies by fission and 
                         subsequently disperse. The final appearance of an asteroid family 
                         is thus the product of a drawn-out evolution.",
                  doi = "10.1038/s41550-019-0887-8",
                  url = "http://dx.doi.org/10.1038/s41550-019-0887-8",
                 issn = "2397-3366",
             language = "en",
           targetfile = "carruba_population.pdf",
        urlaccessdate = "25 abr. 2024"
}