The Eunomia family: A visible spectroscopic survey

Citation
D. Lazzaro et al., The Eunomia family: A visible spectroscopic survey, ICARUS, 142(2), 1999, pp. 445-453
Citations number
53
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Space Sciences
Journal title
ICARUS
ISSN journal
0019-1035 → ACNP
Volume
142
Issue
2
Year of publication
1999
Pages
445 - 453
Database
ISI
SICI code
0019-1035(199912)142:2<445:TEFAVS>2.0.ZU;2-A
Abstract
We observed 44 Eunomia family members at ESO (European Southern Observatory ) and at CASLEO (Complejo Astronomico El Leoncito) in the wavelength range of 4900-9200 Angstrom. We found 41 objects with the same characteristics: a maximum around lambda = 7500 Angstrom, and a reflectivity gradient spannin g a continuous but limited range. Only 3 objects display featureless spectr a similar to C-type asteroids, and these should be considered as interloper s, The spectra of the 41 objects show a similarity which is consistent with the dynamical hypothesis of a common origin. On the other hand, the spread of distribution of surface composition also indicates that the Eunomia fam ily was possibly formed from the fragmentation of a partially differentiate d S-type parent body. (C) 1999 Academic Press.