Physical characterization of the Karin family

被引：12
作者：
Vernazza, P. [1 ]
Birlan, M.
Rossi, A.
Dotto, E.
Nesvorny, D.
Brunetto, R.
Fornasier, S.
Fulchignoni, M.
Renner, S.
机构：
[1] Observ Paris, LESIA, F-92195 Meudon, France
[2] Observ Paris, IMCCE, F-75014 Paris, France
[3] CNR, ISTI, Spaceflight Dynam Sect, I-56124 Pisa, Italy
[4] Osserv Astron Roma, INAF, I-00040 Monte Porzio Catone, Italy
[5] SW Res Inst, Boulder, CO 80302 USA
[6] Univ Lecce, Dipartimento Fis, I-73100 Lecce, Italy
[7] Univ Padua, Dept Astron, CISAS, I-35122 Padua, Italy
来源：
ASTRONOMY & ASTROPHYSICS | 2006年 / 460卷 / 03期
关键词：
methods : data analysis; techniques : spectroscopic; minor planets; asteroids;
D O I：
10.1051/0004-6361:20065779
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
Aims. The Karin cluster is a small asteroid family that formed 5.8 +/- 0.2 Myr ago in the outer main belt. This is an exceptionally young age for an asteroid family. To investigate the composition and homogeneity of the members of this family, we started a spectroscopic survey in the visible and in the near-IR. Methods. We observed 24 Karin asteroid members in the visible and 6 members in the near-IR. Results. In the visible range, all the objects share the same characteristics: a maximum around lambda = 0.75 mu m, and a spectral slope spanning a continuous but limited range; in the NIR, our spectra show a similar behaviour. Our results suggest global homogeneity of the parent body and none of the investigated objects seems to be an interloper. These results are consistent with the dynamical hypothesis of a common origin. Finally, the range of spectral slopes is similar with the range of slopes for OC meteorites. We interpret this result as an indication of a low degree of spatial alteration for the observed surfaces. This result is coherent with the young age of the family.
引用
收藏
页码：945 / U179
页数：12
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