Capture, permanence and escape of resonances in the Solar System
Study of the origin and evolution of the moving belts of the Southern and Southeas...
Orbital evolution of the asteroids in the first 700 MY of the solar system
| Full text | |
| Author(s): |
Migliorini, Alessandra
[1]
;
De Sanctis, M. C.
[1]
;
Michtchenko, T. A.
[2]
;
Lazzaro, D.
[3]
;
Barbieri, M.
[4]
;
Mesa, D.
[5]
;
Lazzarin, M.
[6]
;
La Forgia, F.
[6]
Total Authors: 8
|
| Affiliation: | [1] Inst Space Astrophys & Planetol, IAPS INAF, Rome - Italy
[2] Univ Sao Paulo, IAG, Sao Paulo - Brazil
[3] COAA, Observ Nacl, Rio De Janeiro - Brazil
[4] Univ Atacama, Inst Aston & Ciencias Planetarias Atacama, Copiapo - Chile
[5] INAF OAPd, Observ Padova, Padua - Italy
[6] Univ Padua, Dept Phys & Astron G Galilei, Padua - Italy
Total Affiliations: 6
|
| Document type: | Journal article |
| Source: | Monthly Notices of the Royal Astronomical Society; v. 504, n. 2, p. 2019-2032, JUN 2021. |
| Web of Science Citations: | 0 |
| Abstract | |
We present new spectral observations using ground-based telescopes of 23 putative V-type asteroids, selected according to colour surveys in the visible from the Moving Objects Catalogue of the Sloan Digital Sky Survey and near-infrared from the Moving Objects VISTA catalogue. 10 asteroids are orbiting in the middle main belt, while five in the outer part of the main asteroid belt. For the observed asteroids, we assign a taxonomical classification and confirm the basaltic nature for 16 of them. The high-quality spectra in the UV range, obtained with the X-Shooter spectrograph at ESO, allowed the identification of the Fe2+ forbidden transition of pyroxene for 10 asteroids. This band is centred at 506.5 nm, and it is diagnostic of the Ca-content in the pyroxene form. We determined a low Fe-content composition for asteroids (2452) Lyot, (5758) Brunini, (7675) Gorizia, (9197) Endo, (22308) 1990 UO4, (36118) 1999 RE135, (66905) 1999 VC160, and (189597) 2000 WG119, and a composition more rich in Fe for asteroids (75661) 2000 AB79 and (93620) 2000 UQ70. We also present a dynamical investigation of V-type asteroids in the middle and outer main belt. The principal finding of these simulations is that the middle and outer V-types are more likely to be associated with some families, which were considered as possibly originated from the break up of a partially or totally differentiated parent body by diverse studies. This reinforces the hypothesis that the identified V-type in the region were not originated from (4) Vesta and that the number of differentiated objects in the middle and outer main belt must have been much larger than previously assumed. (AU) | |
| FAPESP's process: | 09/54006-4 - A computer cluster for the Astronomy Department of the University of São Paulo Institute of Astronomy, Geophysics and Atmospheric Sciences and for the Cruzeiro do Sul University Astrophysics Center |
| Grantee: | Elisabete Maria de Gouveia Dal Pino |
| Support Opportunities: | Multi-user Equipment Program |
| FAPESP's process: | 16/13750-6 - Brazil in space: Astrophysics and Engineering |
| Grantee: | Eduardo Janot Pacheco |
| Support Opportunities: | Special Projects |