Polarimetric survey of main-belt asteroids. III. Results for 33 X-type objects

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Title: Polarimetric survey of main-belt asteroids. III. Results for 33 X-type objects
Authors: Cañada-Assandri, Marcela | Gil-Hutton, Ricardo | Benavídez, Paula Gabriela
Research Group/s: Astronomía y Astrofísica
Center, Department or Service: Universidad de Alicante. Departamento de Física, Ingeniería de Sistemas y Teoría de la Señal
Keywords: Minor planets, asteroids: general | Ttechniques: polarimetric
Knowledge Area: Física Aplicada
Issue Date: 25-May-2012
Publisher: EDP Sciences
Citation: Astronomy & Astrophysics. 2012, 542: A11. doi:10.1051/0004-6361/201118734
Abstract: Aims. We present results of a polarimetric survey of main-belt asteroids at Complejo Astronómico El Leoncito (Casleo), San Juan, Argentina. The aims of this survey are to increase the database of asteroid polarimetry, to estimate diversity in polarimetric properties of asteroids that belong to different taxonomic classes, and to search for objects that exhibit anomalous polarimetric properties. Methods. The data were obtained with the Torino and CASPROF polarimeters at the 2.15 m telescope. The Torino polarimeter is an instrument that allows the simultaneous measurement of polarization in five different bands, and the CASPROF polarimeter is a two-hole aperture polarimeter with rapid modulation. Results. The survey began in 2003, and up to 2009 data of a sample of more than 170 asteroids were obtained. In this paper the results for 33 X-type objects are presented, several of them are being polarimetrically observed for the first time. Using these data we found polarization curves and polarimetric parameters for different groups among this taxonomic class and that there are objects with very different albedo in the sub-classes of the X taxonomic complex.
Sponsor: RGH gratefully acknowledges financial support by CONICET through PIP 114-200801-00205.
URI: http://hdl.handle.net/10045/33814
ISSN: 0004-6361 (Print) | 1432-0746 (Online)
DOI: 10.1051/0004-6361/201118734
Language: eng
Type: info:eu-repo/semantics/article
Rights: © ESO, 2012
Peer Review: si
Publisher version: http://dx.doi.org/10.1051/0004-6361/201118734
Appears in Collections:INV - Astronomía y Astrofísica - Artículos de Revistas

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