author = "Aljbaae, S. and Souchay, J. and Prado, Antonio Fernando Bertachini 
                         de Almeida and Chanut, T. G. G.",
          affiliation = "{Instituto Nacional de Pesquisas Espaciais (INPE)} and SYRTE, 
                         Observatoire de Paris, PSL Research University, CNRS, Sorbonne 
                         Universit{\'e}s and {Instituto Nacional de Pesquisas Espaciais 
                         (INPE)} and {Instituto Nacional de Pesquisas Espaciais (INPE)}",
                title = "A dynamical study of the Gefion asteroid family",
              journal = "Astronomy and Astrophysics",
                 year = "2019",
               volume = "622",
               number = "A39",
                month = "Jan.",
             keywords = "minor planets, asteroids: general, celestial mechanics, 
             abstract = "The Gefion asteroid family is a group of S-type asteroids located 
                         between the 8J:-3A and 5J:-2A mean-motion resonances. The 5J:-2A 
                         resonance seems to be responsible for the absence of the right 
                         side of the V-shape of this family. We aim in this work to present 
                         a detailed study on the Gefion family, motivated by the 
                         incompatibility found in previous family age estimations and the 
                         fact that this family could be seen as one of the most probable 
                         sources of L-chondrite meteorites. After eliminating all possible 
                         taxonomical and dynamical interlopers, we use a Monte Carlo method 
                         to analyze the semi-major axis evolution of several fictitious 
                         families under the influence of the Yarkovsky and 
                         Yarkovsky-O'Keefe-Radzievsky-Paddack (YORP) effects. We also 
                         perform simulations using symplectic integrators to account for 
                         the Yarkovsky effect (diurnal and seasonal versions) and the 
                         stochastic YORP effect. We make use of the distribution of the 
                         component of the ejection velocity field (V-W) perpendicular to 
                         the orbital plane and the time dependence of the asymmetry of the 
                         distribution of the target function of a fictitious family 
                         generated with ejection velocity parameter 20(-15)(+55) ms(-1) to 
                         obtain an age estimate of 1030(-67)(+19) Myr. We find that 6.5% of 
                         asteroids from the Gefion family can reach orbits similar to 
                         particles in the current near-Earth objects space; 73% of them are 
                         among the Amors asteroids, and the remaining ones are among the 
                         Apollos. We only found 0.5% from the Gefion family reaching the 
                         Mars-crossing space.",
                  doi = "10.1051/0004-6361/201834470",
                  url = "http://dx.doi.org/10.1051/0004-6361/201834470",
                 issn = "0004-6361 and 1432-0746",
             language = "en",
        urlaccessdate = "23 nov. 2020"