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On the age of the Beagle secundary asteroid family
- Source :
- Scopus, Repositório Institucional da UNESP, Universidade Estadual Paulista (UNESP), instacron:UNESP
- Publication Year :
- 2018
-
Abstract
- Made available in DSpace on 2018-12-11T17:38:27Z (GMT). No. of bitstreams: 0 Previous issue date: 2018-01-01 California Institute of Technology Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq) The Beagle family is a C-type subgroup of the Themis family, in the outer main belt. Previous works suggested that it could be younger than 20 Myr and a possible source for the dust in the i≃1.4∘ α zodiacal dust band. Here we took advantage of a much larger database for Beagle family members to revisit previous age estimates of this group. Standard dating techniques based on the family V-shape or on Monte Carlo methods of Yarkovsky and YORP mobility suggest that i) there might be a dichotomy for the inner and outer part of the Beagle family, which may be either two separate families or the product of an anisotropic ejection velocity field and that ii) the age of the possibly younger outer part of the Beagle family should be 35−35 +65 Myr. The past convergence of Beagle longitude of the node is compatible with a family age of ≃14 Myr, when (1678) Glarona is used as a reference orbit. Without further information on Beagle members spin states, however, only very lower limits on the family age can be currently obtained when the Yarkovksy force is accounted for. São Paulo State University (UNESP) School of Natural Sciences and Engineering São Paulo State University (UNESP) School of Natural Sciences and Engineering CNPq: 305453/2011-4
- Subjects :
- Physics
Zodiacal light
010504 meteorology & atmospheric sciences
myr
Minor planets
Astronomy and Astrophysics
Astrophysics
Asteroid family
01 natural sciences
Beagle
Celestial mechanics
Ejection velocity
individual: (656) Beagle [Asteroids]
Space and Planetary Science
Asteroid
0103 physical sciences
Longitude
010303 astronomy & astrophysics
general [Asteroids]
0105 earth and related environmental sciences
Subjects
Details
- Language :
- English
- Database :
- OpenAIRE
- Journal :
- Scopus, Repositório Institucional da UNESP, Universidade Estadual Paulista (UNESP), instacron:UNESP
- Accession number :
- edsair.doi.dedup.....5d4217a9a67cc8b6b730ace5440411de