Planet formation: statistics of spin rates and obliquities of extrasolar planets

We develop a simple model of planetary formation, focusing our attention on those planets with masses less than 10 M⊕ and studying particularly the primordial spin parameters of planets resulting from the accretion of planetesimals and produced by the collisions between the embryos. As initial condi...

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Detalles Bibliográficos
Autores principales: Miguel, Yamila, Brunini, Adrián
Formato: Articulo
Lenguaje:Inglés
Publicado: 2010
Materias:
Ciencias Astronómicas
Planets
satellites
formation
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/82511
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-82511
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
Planets
satellites
formation
spellingShingle Ciencias Astronómicas
Planets
satellites
formation
Miguel, Yamila
Brunini, Adrián
Planet formation: statistics of spin rates and obliquities of extrasolar planets
topic_facet Ciencias Astronómicas
Planets
satellites
formation
description We develop a simple model of planetary formation, focusing our attention on those planets with masses less than 10 M⊕ and studying particularly the primordial spin parameters of planets resulting from the accretion of planetesimals and produced by the collisions between the embryos. As initial conditions, we adopt the oligarchic growth regime of protoplanets in a disc where several embryos are allowed to form. We take different initial planetary system parameters and for each initial condition, we consider an evolution of 2 × 107 yr of the system. We perform simulations for 1000 different discs, and from their results we derive the statistical properties of the assembled planets. We have taken special attention to the planetary obliquities and rotation periods, such as the information obtained from the mass and semimajor axis diagram, which reflects the process of planetary formation. The distribution of obliquities was found to be isotropic, which means that planets can rotate in direct or indirect sense, regardless of their mass. Our results regarding the primordial rotation periods show that they are dependent on the region where the embryo was formed and evolved. According to our results, most of the planets have rotation periods between 10 and 10 000 h and there are also a large population of planets similar to terrestrial planets in the Solar system.
format Articulo
Articulo
author Miguel, Yamila
Brunini, Adrián
author_facet Miguel, Yamila
Brunini, Adrián
author_sort Miguel, Yamila
title Planet formation: statistics of spin rates and obliquities of extrasolar planets
title_short Planet formation: statistics of spin rates and obliquities of extrasolar planets
title_full Planet formation: statistics of spin rates and obliquities of extrasolar planets
title_fullStr Planet formation: statistics of spin rates and obliquities of extrasolar planets
title_full_unstemmed Planet formation: statistics of spin rates and obliquities of extrasolar planets
title_sort planet formation: statistics of spin rates and obliquities of extrasolar planets
publishDate 2010
url http://sedici.unlp.edu.ar/handle/10915/82511
work_keys_str_mv AT miguelyamila planetformationstatisticsofspinratesandobliquitiesofextrasolarplanets
AT bruniniadrian planetformationstatisticsofspinratesandobliquitiesofextrasolarplanets
bdutipo_str Repositorios
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