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          Institute: MPI für Astronomie     Collection: Publikationen_mpia     Display Documents



  history
ID: 226049.0, MPI für Astronomie / Publikationen_mpia
ESO Large Program on physical studies of
Trans-Neptunian objects and Centaurs: Final
results of the visible spectrophotometric
observations
Authors:Fornasier, S.; Doressoundiram, A.; Tozzi, G. P.; Barucci, M. A.; Boehnhardt, H.; de Bergh, C.; Delsanti, A.; Davies, J.; Dotto, E.
Date of Publication (YYYY-MM-DD):2004
Title of Journal:Astronomy and Astrophysics
Volume:421
Start Page:353
End Page:363
Review Status:not specified
Audience:Not Specified
Abstract / Description:The Large Program on physical studies of TNOs
and Centaurs, started at ESO Cerro Paranal on
April 2001, has recently been concluded. This
project was devoted to the investigation of the
surface properties of these icy bodies through
photometric and spectroscopic observations. In
this paper we present the latest results on these
pristine bodies obtained from the
spectrophotometric investigation in the visible
range. The newly obtained spectrophotometric
data on 3 Centaurs and 5 TNOs, coming from 2
observing runs at the Very Large Telescope (VLT),
show a large variety of spectral
characteristics, comprising both gray and red
objects in the two different populations. A very
broad and weak absorption feature, centered
around 7000 Å , has been revealed in the
spectrum of the gray TNO 2003 AZ84. This
absorption is very similar to a feature observed
on low albedo main belt asteroids and attributed
to the action of the aqueous alteration process
on minerals. This process was previously also
claimed as the most plausible explanation for
some peculiar visible absorption bands observed
on 2000 EB173 and 2000 GN171 in the framework of
the Large Program (Lazzarin et al.
\cite{Lazzarin03}; de Bergh et al.
\cite{Bergh04}). This detection seems to
reinforce the hypothesis that aqueous alteration
might have taken place also at such large
heliocentric distances.
Free Keywords:Kuiper belt; minor planets; asteroids
External Publication Status:published
Document Type:Article
Communicated by:N. N.
Affiliations:MPI für Astronomie
External Affiliations:Vicolo dell'Osservatorio 2, 35122 Padova, Italy
<EMAIL>fornasier@pd.astro.it</EMAIL>), AB(LESIA,
Observatoire de Paris, 92195 Meudon Pricipal
Cedex, France
<EMAIL>alain.doressoundiram@obspm.fr</EMAIL>
AC(INAF-Osservatorio Astrofisico di Arcetri,
Largo E. Fermi 5, 50125 Firenze, Italy
<EMAIL>tozzi@arcetri.astro.it</EMAIL>), AD(LESIA,
Observatoire de Paris, 92195 Meudon Pricipal
Cedex, France
<EMAIL>antonella.barucci@obspm.fr</EMAIL>),
AE(Max-Planck-Institute for Astronomy,
Koenigstuhl 17, 69117 Heidelberg, Germany
<EMAIL>hboehnha@mpia-hd.mpg.de</EMAIL>),
AF(LESIA, Observatoire de Paris, 92195 Meudon
Pricipal Cedex, France
<EMAIL>Catherine.deBergh@obspm.fr</EMAIL>),
AG(LESIA, Observatoire de Paris, 92195 Meudon
Pricipal Cedex, France
<EMAIL>Audrey.Delsanti@obspm.fr</EMAIL>),
AH(Astronomy Technology Centre, Blackford Hill,
Edinburgh, EH9 3HJ, Scotland, UK
<EMAIL>J.Davies@roe.ac.uk</EMAIL>),
AI(INAF-Osservatorio Astronomico di Roma, via
Frascati 33, 00040, Monte Porzio Catone (Roma),
Italy <EMAIL>dotto@mporzio.astro.it</EMAIL>)
Identifiers:URL:http://adsabs.harvard.edu/cgi-bin/nph-bib_query?bi... [ID No:1]
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