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The primary aim of this work is to examine the effect of parabolic stellar encounters on the evolution of a Jovian-mass giant planet forming within a protoplanetary disc. We consider the effect on both the mass accretion and the migration…

地球与行星天体物理 · 物理学 2015-05-14 Moritz Fragner , Richard Nelson

Models of terrestrial planet formation for our solar system have been successful in producing planets with masses and orbits similar to those of Venus and Earth. However, these models have generally failed to produce Mars-sized objects…

地球与行星天体物理 · 物理学 2015-06-18 A. Izidoro , N. Haghighipour , O. C. Winter , M. Tsuchida

We point out that protoplanets created in the framework of the Tidal Downsizing (TD) theory for planet formation play a very important role for the evolution of accretion discs hosting them. Since all TD protoplanets are initially as…

太阳与恒星天体物理 · 物理学 2015-06-12 Sergei Nayakshin

Gas accretion onto the circumplanetary disks and the source region of accreting gas are important to reveal dust accretion that leads to satellite formation around giant planets. We performed local three-dimensional high-resolution…

地球与行星天体物理 · 物理学 2022-08-24 Natsuho Maeda , Keiji Ohtsuki , Takayuki Tanigawa , Masahiro N. Machida , Ryo Suetsugu

We explore in situ formation and subsequent evolution of close-in super-Earths and mini-Neptunes. We adopt a steady-state inner protoplanetary gas disc structure that arises from viscous accretion due to the magneto-rotational instability…

太阳与恒星天体物理 · 物理学 2019-01-16 Marija R. Jankovic , James E. Owen , Subhanjoy Mohanty

Planet formation encompasses processes that span a remarkable 40 magnitudes in mass, ranging from collisions between micron-sized grains inherited from the ISM to the accretion of gas by giant planets. The planet formation process takes…

地球与行星天体物理 · 物理学 2024-12-18 Chris Ormel

We investigate the stability of those low-mass Trojan planets that form in a protoplanetary disc and subsequently accrete gas to become gas giants. We calculate their evolution before, during, and after gas disc dispersal. A two-dimensional…

天体物理学 · 物理学 2009-11-13 Paul Cresswell , Richard P. Nelson

[Abridged] The formation of Jupiter is modeled via core-nucleated accretion, and the planet's evolution is simulated up to the present epoch. The growth from a small embryo until gas accretion overtakes solids' accretion was presented by…

地球与行星天体物理 · 物理学 2020-10-16 Gennaro D'Angelo , Stuart J. Weidenschilling , Jack J. Lissauer , Peter Bodenheimer

The radial-dependent positions of snowlines of abundant oxygen- and carbon-bearing molecules in protoplanetary discs will result in systematic radial variations in the C/O ratios in the gas and ice. This variation is proposed as a tracer of…

地球与行星天体物理 · 物理学 2020-09-30 Shota Notsu , Christian Eistrup , Catherine Walsh , Hideko Nomura

More than two decades after the widespread detection of Jovian-class planets on short-period orbits around other stars, their dynamical origins remain imperfectly understood. In the traditional narrative, these highly irradiated giant…

地球与行星天体物理 · 物理学 2018-10-17 Elizabeth Bailey , Konstantin Batygin

In order to explain the main characteristics of the observed population of extrasolar planets and the giant planets in the Solar System, we need to get a clear understanding of which are the initial conditions that allowed their formation.…

地球与行星天体物理 · 物理学 2015-05-20 Yamila Miguel , Octavio M. Guilera , Adrián Brunini

Planetesimal accretion is a key source for heavy-element enrichment in giant planets. It has been suggested that Jupiter's enriched envelope is a result of planetesimal accretion during its growth assuming it formed in a massive…

地球与行星天体物理 · 物理学 2022-12-21 Sho Shibata , Ravit Helled , Hiroshi Kobayashi

Planet formation is inherently linked to protoplanetary disc evolution, which recent developments suggest is driven by magnetised winds rather than turbulent viscosity. We study planet formation in magnetohydrodynamic (MHD) wind-driven…

地球与行星天体物理 · 物理学 2026-01-07 Jesse Weder , Christoph Mordasini

We examine the accretion of cores of giant planets from planetesimals, gas accretion onto the cores, and their orbital migration. We adopt a working model for nascent protostellar disks with a wide variety of surface density distributions…

天体物理学 · 物理学 2009-11-10 S. Ida , D. N. C. Lin

The favored theoretical explanation for giant planet formation -- in both our solar system and others -- is the core accretion model (although it still has some serious difficulties). In this scenario, planetesimals accumulate to build up…

天体物理学 · 物理学 2016-08-30 Gregory Laughlin , Peter Bodenheimer , Fred C. Adams

Tenuous dust clouds of Jupiter's Galilean moons Io, Europa, Ganymede and Callisto have been detected with the in-situ dust detector on board the Galileo spacecraft. The majority of the dust particles have been sensed at altitudes below five…

天体物理学 · 物理学 2007-05-23 Harald~Krüger , Alexander V. Krivov , Miodrag Sremčević , Eberhard Grün

Recent observational findings have suggested a positive correlation between the occurrence rates of inner super-Earths and outer giant planets. These results raise the question of whether this trend can be reproduced and explained by planet…

地球与行星天体物理 · 物理学 2021-12-08 M. Schlecker , C. Mordasini , A. Emsenhuber , H. Klahr , Th. Henning , R. Burn , Y. Alibert , W. Benz

Thanks to recent high resolution ALMA observations, there is an accumulating evidence for presence of giant planets with masses from $\sim 0.01$ Jupiter mass to a few Jupiter mass with separations up to $ 100$~AU in the annular structures…

地球与行星天体物理 · 物理学 2019-06-19 S. Nayakshin , G. Dipierro , J. Szulagyi

In the Grand Tack (GT) scenario for the young solar system, Jupiter formed beyond 3.5 AU from the Sun and migrated as close as 1.5 AU until it encountered an orbital resonance with Saturn. Both planets then supposedly migrated outward for…

地球与行星天体物理 · 物理学 2015-07-01 René Heller , Gabriel-Dominique Marleau , Ralph Egon Pudritz

We present an overview of the formation of Jupiter and its associated circumplanetary disk. Jupiter forms via a combination of planetesimal accretion and gravitational accumulation of gas from the surrounding solar nebula. The formation of…