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Título: | Absolute colours and phase coefficients of trans-Neptunian objects: correlations and populations |
Autor: | Alvarez-Candal, A.; Ayala-Loera, C.; Gil-Hutton, Ricardo A.; Ortiz, José Luis CSIC ORCID ; Santos Sanz, Pablo CSIC ORCID ; Duffard, René D. CSIC ORCID | Palabras clave: | Methods: observational Techniques: photometric Kuiper belt: general |
Fecha de publicación: | sep-2019 | Editor: | Oxford University Press | Citación: | Monthly Notices of the Royal Astronomical Society 488(3): 3035-3044 (2019) | Resumen: | The study of the visible colours of the trans-Neptunian objects opened a discussion almost 20 yr ago which, in spite of the increase in the amount of available data, seems far from subside. Visible colours impose constraints to the current theories of the early dynamical evolution of the Solar system such as the environment of formation, initial surface composition, and how (if) they were scattered to regions closer to the inner planets. In this paper, we present an updated version of our data base of absolute colours and relative phase coefficients for 117 objects. We define the absolute colours as the difference of the absolute magnitudes H-V - H-R, and the relative phase coefficient as the difference of the slopes of the phase curves Delta beta. These were obtained joining our own observations plus data from the literature. The methodology has been introduced in previous works and here we expand in some interesting results, in particular the strong anticorrelation found between H-V - H-R and Delta beta, which means that redder objects have steeper phase curves in the R filter, while bluer objects have steeper phase curves in the V filter. We analyse a series of results published in the literature in view of our data base, which is free of phase effects, and show that their statistical meaning is not very strong. We point out that phase-colouring and observational errors play an important role in the understanding of these proposed relationships.© 2019 The Author(s) Published by Oxford University Press on behalf of the Royal Astronomical Society | Versión del editor: | http://dx.doi.org/10.1093/mnras/stz1880 | URI: | http://hdl.handle.net/10261/191936 | DOI: | 10.1093/mnras/stz1880 | ISSN: | 0035-8711 |
Aparece en las colecciones: | (IAA) Artículos |
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IAA_2019_stz1880.pdf | 1,24 MB | Adobe PDF | Visualizar/Abrir |
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