EDP Sciences
Free access
Issue A&A
Volume 393, Number 3, October III 2002
Page(s) 1065 - 1072
Section The solar system
DOI http://dx.doi.org/10.1051/0004-6361:20021190

A&A 393, 1065-1072 (2002)
DOI: 10.1051/0004-6361:20021190

ISO observations of low and moderate albedo asteroids

PHT-P and PHT-S results
E. Dotto1, 2, M. A. Barucci3, T. G. Müller4, 5, J. R. Brucato6, M. Fulchignoni2, 7, V. Mennella6 and L. Colangeli6

1  INAF - Osservatorio Astronomico di Torino, Strada Osservatorio 20, 10025 Pino Torinese (TO), Italy
2  INAF - Osservatorio Astronomico di Roma, via Frascati 33, 00040 Monteporzio Catone (Roma), Italy
3  LESIA - Observatoire de Paris, 5 place J. Jannsen, 92195 Meudon Principal Cedex, France
    e-mail: antonella.barucci@obspm.fr
4  Max-Planck-Institut fuer extraterrestrische Physik, Giessenbachstrasse, 85748 Garching, Germany
    e-mail: tmueller@mpe.mpg.de
5  Data Centre, ESA, Villafranca Del Castillo, Apdo 50727, 28080 Madrid, Spain (until Dec. 2001)
6  INAF - Osservatorio Astronomico di Capodimonte, via Moiariello 16, 80131 Napoli, Italy
    e-mail: brucato@na.astro.it; mennella@na.astro.it; colangeli@na.astro.it
7  Université Paris VII, Paris, France
    e-mail: marcello.fulchignoni@obspm.fr

(Received 19 April 2002 / Accepted 20 June 2002 )

The ISO observations presented here are devoted to low and moderate albedo asteroids, which are supposed to be among the more primitive objects of the solar system. Spectroscopic and multi-filter photometric data of 77 Frigga, 114 Kassandra, 308 Polyxo, 511 Davida, and 914 Palisana have been obtained by the ISO instrument ISOPHOT. The subsystem PHT-P carried out photometric observations at 10, 12, 25, and 60  $\mu$m, while low resolution spectra have been acquired by the subsystem PHT-S between 5.8 and 11.6  $\mu$m. The Standard Thermal Model and a black-body fit have been applied to the obtained data in order to model the thermal continuum and to derive sub-solar and black-body temperatures. To interpret the obtained results and to investigate the surface composition of the observed asteroids, we compare the ISO spectra with the whole sample of mineral and meteorite laboratory spectra available in the literature. New laboratory experiments performed at the Capodimonte Observatory have been carried out to increase the available sample. A tentative spectral similarity with meteorites is presented.

Key words: minor planets, asteroids -- infrared: solar system

Offprint request: E. Dotto, dotto@to.astro.it

© ESO 2002

What is OpenURL?

The OpenURL standard is a protocol for transmission of metadata describing the resource that you wish to access. An OpenURL link contains article metadata and directs it to the OpenURL server of your choice. The OpenURL server can provide access to the resource and also offer complementary services (specific search engine, export of references...). The OpenURL link can be generated by different means.
  • If your librarian has set up your subscription with an OpenURL resolver, OpenURL links appear automatically on the abstract pages.
  • You can define your own OpenURL resolver with your EDPS Account. In this case your choice will be given priority over that of your library.
  • You can use an add-on for your browser (Firefox or I.E.) to display OpenURL links on a page (see http://www.openly.com/openurlref/). You should disable this module if you wish to use the OpenURL server that you or your library have defined.

Editor-in-Chief: T. Forveille
Letters Editor-in-Chief: J. Alves
Managing Editor: C. Bertout

ISSN: 0004-6361 ; e-ISSN: 1432-0746
Frequency: 12 volumes per year
Published by: EDP Sciences

Mirror sites: CDS | EDP Sciences
  RSS feeds
© The European Southern Observatory (ESO)