A spectroscopic study of the Themis family

M. Florczak; D. Lazzaro; T. Mothé-Diniz; C. A. Angeli; A. S. Betzler

doi:10.1051/aas:1999150

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Volume 134 / No 3 (February I 1999)

Astron. Astrophys. Suppl. Ser., 134 3 (1999) 463-471

Abstract

Free Access

Issue		Astron. Astrophys. Suppl. Ser. Volume 134, Number 3, February I 1999


Page(s)		463 - 471
DOI		https://doi.org/10.1051/aas:1999150
Published online		15 February 1999

Astron. Astrophys. Suppl. Ser. 134, 463-471 (1999)

A spectroscopic study of the Themis family ^,^,^

M. Florczak¹^,2, D. Lazzaro¹, T. Mothé-Diniz¹, C. A. Angeli¹ and A. S. Betzler¹

¹ CNPq/Observatório Nacional Depto. Astrofísica, 20921-400 Rio de Janeiro, Brazil e-mail: florczak@on.br, lazzaro@on.br
² CEFET, Depto. Física, 80000 Curitiba, Brazil

Received: 3 July 1998
Accepted: 4 September 1998

Abstract

We present spectroscopic observations of 36 asteroids, members of the Themis family. These observations were carried on at the European Southern Observatory in the wavelength range $4900 - 9200$ Å. Most of the objects present a spectra similar to C-type asteroids and some of them present indicative of aqueous alteration. We discuss the implications of these results on the formation and evolution of this family.

Key words: minor planets, asteroids

^*

Based on observations made with the 1.52 m telescope at the European Southern Observatory (La Silla, Chile) under the agreement with the CNPq/ Observatório Nacional.

^**

Table A1 is available at the CDS via anonymous ftp 130.79.128.5 or http://cdsweb.u-strasbg.fr/Abstract.html

^***

Appendix A is only available at the journal, http://aas.aanda.org

Tables at the CDS

A spectroscopic study of the Themis family *,**,***

A spectroscopic study of the Themis family ^,^,^