Origin of craters on Phoebe: Comparison with Cassini's data

Context. Phoebe is one of the irregular satellites of Saturn. The images taken by the <i>Cassini-Huygens</i> spacecraft have allowed us to analyze its surface and the craters on it. Aims. We study the craters on Phoebe produced by both Centaur objects from the scattered disk (SD) and p...

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Autores principales: Di Sisto, Romina Paula, Brunini, Adrián
Formato: Articulo
Lenguaje:Inglés
Publicado: 2011
Materias:
Ciencias Astronómicas
methods: numerical
Kuiper belt: general
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/84047
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-84047
record_format dspace
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection SEDICI (UNLP)
language Inglés
topic Ciencias Astronómicas
methods: numerical
Kuiper belt: general
spellingShingle Ciencias Astronómicas
methods: numerical
Kuiper belt: general
Di Sisto, Romina Paula
Brunini, Adrián
Origin of craters on Phoebe: Comparison with Cassini's data
topic_facet Ciencias Astronómicas
methods: numerical
Kuiper belt: general
description Context. Phoebe is one of the irregular satellites of Saturn. The images taken by the <i>Cassini-Huygens</i> spacecraft have allowed us to analyze its surface and the craters on it. Aims. We study the craters on Phoebe produced by both Centaur objects from the scattered disk (SD) and plutinos that have escaped from the 3:2 mean motion resonance with Neptune and compare our results with the observations by <i>Cassini</i>. Methods. We use previously developed simulations of trans-Neptunian objects and a method that allows us to derive the number of craters and the cratering rate on Phoebe. Results. We determine the number of craters and the largest crater on Phoebe produced by Centaurs in the present configuration of the solar system. We obtain a present normalized rate of encounters of Centaurs with Saturn of F = 7.1 × 10<SUP>-11</SUP> per year, from which we can infer the current cratering rate on Phoebe for each crater diameter. Conclusions. Our study and comparison with observations suggest that the main crater features on Phoebe are unlikely to have been produced in the present configuration of the solar system but that they must have been created instead when the SD were depleted in the early solar system. If this is indeed what happened and the craters were produced when Phoebe was a satellite of Saturn, then it must have been captured, very early on in the evolution of the solar system.
format Articulo
Articulo
author Di Sisto, Romina Paula
Brunini, Adrián
author_facet Di Sisto, Romina Paula
Brunini, Adrián
author_sort Di Sisto, Romina Paula
title Origin of craters on Phoebe: Comparison with Cassini's data
title_short Origin of craters on Phoebe: Comparison with Cassini's data
title_full Origin of craters on Phoebe: Comparison with Cassini's data
title_fullStr Origin of craters on Phoebe: Comparison with Cassini's data
title_full_unstemmed Origin of craters on Phoebe: Comparison with Cassini's data
title_sort origin of craters on phoebe: comparison with cassini's data
publishDate 2011
url http://sedici.unlp.edu.ar/handle/10915/84047
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AT bruniniadrian originofcratersonphoebecomparisonwithcassinisdata
bdutipo_str Repositorios
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