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Artículo

A polarimetric study of asteroids: Fitting phase-polarization curves

Cellino, A.; Bagnulo, S.; Gil Hutton, Ricardo AlfredoIcon ; Tanga, P.; Cañada Assandri, Marcela InésIcon ; Tedesco, E
Fecha de publicación: 01/2016
Editorial: Oxford University Press
Revista: Monthly Notices of the Royal Astronomical Society
ISSN: 0035-8711
Idioma: Inglés
Tipo de recurso: Artículo publicado
Clasificación temática:
Astronomía

Resumen

By considering all published asteroid linear polarization data available in the literature, it is possible to obtain updated phase-polarization curves for several tens of objects. In a separate paper, we have produced new calibrations of different relations between the geometric albedo and several polarimetric parameters, based on an analysis of a limited sample of asteroids for which the albedo is known with sufficient accuracy. In this paper, we present the main polarization parameters and corresponding albedos for a larger data set of asteroids which we did not use for calibration purposes. We find a good agreement between the albedo values computed using different polarization parameters. Conversely, in the case of the so-called Barbarian asteroids the situation is rather unclear. Moreover, we present an updated analysis of the distributions of different polarimetric parameters, including the so-called inversion angle and the solar phase angle corresponding to the extreme value of negative polarization, and study their mutual relations. We find that the above parameters can be used to clearly distinguish some unusual classes of asteroids. Polarimetric parameters are known to be related to physical properties of asteroid surfaces which are difficult to infer by means of other observing techniques. By using a much larger data set, in our analysis we confirm and extend some results obtained in the past by other authors, and we explore more systematically some features that had been mostly unexplored before, mainly concerning the morphology of the negative polarization branch.
Palabras clave: Asteroids: General , Minor Planets , Polarization
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info:eu-repo/semantics/openAccess Excepto donde se diga explícitamente, este item se publica bajo la siguiente descripción: Creative Commons Attribution-NonCommercial-ShareAlike 2.5 Unported (CC BY-NC-SA 2.5)
Identificadores
URI: http://hdl.handle.net/11336/61199
DOI: http://dx.doi.org/10.1093/mnras/stv2445
URL: https://academic.oup.com/mnras/article-abstract/455/2/2091/1121645
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Articulos(CASLEO)
Articulos de COMPLEJO ASTRONOMICO "EL LEONCITO"
Citación
Cellino, A.; Bagnulo, S.; Gil Hutton, Ricardo Alfredo; Tanga, P.; Cañada Assandri, Marcela Inés; et al.; A polarimetric study of asteroids: Fitting phase-polarization curves; Oxford University Press; Monthly Notices of the Royal Astronomical Society; 455; 2; 1-2016; 2091-2100
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