TY  - JOUR
ID  - Yang2020a
T1  - Physical and dynamical characterization of the Euphrosyne asteroid family
A1  - Yang, B.
A1  - Hanuš, J.
A1  - Brož, M.
A1  - Chrenko, O.
A1  - Willman, M.
A1  - Ševeček, P.
A1  - Masiero, J.
A1  - Kaluna, H.
JA  - Astronomy and Astrophysics
Y1  - 2020
VL  - 643
SP  - A38
AD  - AA(European Southern Observatory (ESO), Alonso de Cordova 3107, 1900, Casilla Vitacura, Santiago, Chile), AB(Institute of Astronomy, Faculty of Mathematics and Physics, Charles University, V Holešovičkách 2, 18000, Prague, Czech Republic), AC(Institute of
SN  - 0004-6361
UR  - https://ui.adsabs.harvard.edu/abs/2020A&A...643A..38Y
KW  - asteroids: general
KW  - asteroids: individual: (31) Euphrosyne
KW  - Astrophysics - Earth and Planetary Astrophysics
KW  - methods: numerical
KW  - methods: observational
KW  - minor planets
N2  - <BR /> Aims: The Euphrosyne asteroid family occupies a unique zone in orbital element space around 3.15 au and may be an important source of the low-albedo near-Earth objects. The parent body of this family may have been one of the planetesimals that delivered water and organic materials onto the growing terrestrial planets. We aim to characterize the compositional properties as well as the dynamical properties of the family. <BR /> Methods: We performed a systematic study to characterize the physical properties of the Euphrosyne family members via low-resolution spectroscopy using the NASA Infrared Telescope Facility. In addition, we performed smoothed-particle hydrodynamics (SPH) simulations and N-body simulations to investigate the collisional origin, determine a realistic velocity field, study the orbital evolution, and constrain the age of the Euphrosyne family. <BR /> Results: Our spectroscopy survey shows that the family members exhibit a tight taxonomic distribution, suggesting a homogeneous composition of the parent body. Our SPH simulations are consistent with the Euphrosyne family having formed via a reaccumulation process instead of a cratering event. Finally, our N-body simulations indicate that the age of the family is 280<SUB>-80</SUB><SUP> 180</SUP> Myr, which is younger than previous estimates.
M1  - ={10.1051/0004-6361/202038567
M1  -  eprint: arXiv:2009.04489}
ER  -