Giant planet formation at the pressure maxima of protoplanetary disks

Context. In the classical core-accretion planet-formation scenario, rapid inward migration and accretion timescales of kilometer size planetesimals may not favor the formation of massive cores of giant planets before the dissipation of protoplanetary disks. On the other hand, the existence of pressu...

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Detalles Bibliográficos
Autores principales: Guilera, Octavio Miguel, Sándor, Zs
Formato: Articulo
Lenguaje:Inglés
Publicado: 2017
Materias:
Ciencias Astronómicas
Planets and satellites: Formation
Planets and satellites: Gaseous planets
Protoplanetary disks
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/87247
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-87247
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 and satellites: Formation
Planets and satellites: Gaseous planets
Protoplanetary disks
spellingShingle Ciencias Astronómicas
Planets and satellites: Formation
Planets and satellites: Gaseous planets
Protoplanetary disks
Guilera, Octavio Miguel
Sándor, Zs
Giant planet formation at the pressure maxima of protoplanetary disks
topic_facet Ciencias Astronómicas
Planets and satellites: Formation
Planets and satellites: Gaseous planets
Protoplanetary disks
description Context. In the classical core-accretion planet-formation scenario, rapid inward migration and accretion timescales of kilometer size planetesimals may not favor the formation of massive cores of giant planets before the dissipation of protoplanetary disks. On the other hand, the existence of pressure maxima in the disk could act as migration traps and locations for solid material accumulation, favoring the formation of massive cores. Aims. We aim to study the radial drift of pebbles and planetesimals and planet migration at pressure maxima in a protoplanetary disk and their implications for the formation of massive cores as triggering a gaseous runaway accretion phase. Methods. The time evolution of a viscosity driven accretion disk is solved numerically introducing a a dead zone as a low-viscosity region in the protoplanetary disk. A population of pebbles and planetesimals evolving by radial drift and accretion by the planets is also considered. Finally, the embryos embedded in the disk grow by the simultaneous accretion of pebbles, planetesimals, and the surrounding gas. Results. Our simulations show that the pressure maxima generated at the edges of the low-viscosity region of the disk act as planet migration traps, and that the pebble and planetesimal surface densities are significantly increased due to the radial drift towards pressure maxima locations. However, our simulations also show that migration-trap locations and solid-material-accumulation locations are not exactly at the same positions. Thus, a planet's semi-major axis oscillations around zero torque locations predicted by MHD and HD simulations are needed for the planet to accrete all the available material accumulated at the pressure maxima. Conclusions. Pressure maxima generated at the edges of a low-viscosity region of a protoplanetary disk seem to be preferential locations for the formation and trap of massive cores.
format Articulo
Articulo
author Guilera, Octavio Miguel
Sándor, Zs
author_facet Guilera, Octavio Miguel
Sándor, Zs
author_sort Guilera, Octavio Miguel
title Giant planet formation at the pressure maxima of protoplanetary disks
title_short Giant planet formation at the pressure maxima of protoplanetary disks
title_full Giant planet formation at the pressure maxima of protoplanetary disks
title_fullStr Giant planet formation at the pressure maxima of protoplanetary disks
title_full_unstemmed Giant planet formation at the pressure maxima of protoplanetary disks
title_sort giant planet formation at the pressure maxima of protoplanetary disks
publishDate 2017
url http://sedici.unlp.edu.ar/handle/10915/87247
work_keys_str_mv AT guileraoctaviomiguel giantplanetformationatthepressuremaximaofprotoplanetarydisks
AT sandorzs giantplanetformationatthepressuremaximaofprotoplanetarydisks
bdutipo_str Repositorios
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