Zobrazeno 1 - 10
of 137
pro vyhledávání: '"Lega, Elena"'
Autor:
Velasco-Romero, David A., Masset, Frédéric S., Morbidelli, Alessandro, Benítez-Llambay, Pablo, Krapp, Leonardo, Lega, Elena
We study the orbital evolution and mass growth of protoplanets with masses $M \in [0.1-8]$~M$_\oplus$ in the vicinity of a dusty ring, using three-dimensional numerical simulations with a two-fluid model and nested-meshes. We find two stable, eccentr
Externí odkaz:
http://arxiv.org/abs/2407.16546
Autor:
Griveaud, Philippine, Crida, Aurélien, Petit, Antoine C., Lega, Elena, Morbidelli, Alessandro
In the context of low-viscosity protoplanetary discs (PPDs), the formation scenarios of the Solar System should be revisited. In particular, the Jupiter-Saturn pair has been shown to lock in the 2:1 mean motion resonance while migrating generally inw
Externí odkaz:
http://arxiv.org/abs/2406.20075
In a previous paper we showed that, like the migration speed, the eccentricity damping efficiency is modulated linearly by the depth of the partial gap a planet carves in the disk surface density profile, resulting in less efficient $e$-damping compa
Externí odkaz:
http://arxiv.org/abs/2404.02247
Publikováno v:
A&A 670, A148 (2023)
It is known that gap opening depends on the disc's viscosity; however, eccentricity damping formulas have only been derived at high viscosities, ignoring partial gap opening. We aim at obtaining a simple formula to model $e$-damping of the type-I reg
Externí odkaz:
http://arxiv.org/abs/2212.03608
Publikováno v:
A&A 642, A187 (2020)
Circumplanetary discs (CPDs) form around young gas giants and are thought to be the sites of moon formation as well as an intermediate reservoir of gas that feeds the growth of the gas giant. How the physical properties of such CPDs are affected by t
Externí odkaz:
http://arxiv.org/abs/2003.13398
Publikováno v:
A&A 632, A118 (2019)
The full spatial structure and temporal evolution of the accretion flow into the envelopes of growing gas giants in their nascent discs is only accessible in simulations. Such simulations are constrained in their approach of computing the formation o
Externí odkaz:
http://arxiv.org/abs/1909.08359
Autor:
Lambrechts, Michiel, Lega, Elena, Nelson, Richard P., Crida, Aurélien, Morbidelli, Alessandro
Publikováno v:
A&A 630, A82 (2019)
Gas-giant planets, like Jupiter and Saturn, acquire massive gaseous envelopes during the approximately 3 Myr-long lifetimes of protoplanetary discs. In the core accretion scenario, the formation of a solid core of around 10 Earth masses triggers a ph
Externí odkaz:
http://arxiv.org/abs/1907.06362
Autor:
Bitsch, Bertram, Morbidelli, Alessandro, Johansen, Anders, Lega, Elena, Lambrechts, Michiel, Crida, Aurélien
Publikováno v:
A&A 612, A30 (2018)
The growth of a planetary core by pebble accretion stops at the so called pebble isolation mass, when the core generates a pressure bump that traps drifting pebbles outside its orbit. If the isolation mass is very small, then gas accretion is protrac
Externí odkaz:
http://arxiv.org/abs/1801.02341
Autor:
Lambrechts, Michiel, Lega, Elena
Publikováno v:
A&A 606, A146 (2017)
A large fraction of giant planets have gaseous envelopes that are limited to about 10 % of their total mass budget. Such planets are present in the Solar System (Uranus, Neptune) and are frequently observed in short periods around other stars (the so
Externí odkaz:
http://arxiv.org/abs/1708.00767
Planet migration is inherently a three-dimensional (3D) problem, because Earth-size planetary cores are deeply embedded in protoplanetary disks. Simulations of these 3D disks remain challenging due to the steep requirement in resolution. Using two di
Externí odkaz:
http://arxiv.org/abs/1610.09375