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Advances in computing power and numerical methodologies over the past several decades sparked a prolific output of dynamical investigations of the late stages of terrestrial planet formation. Among other peculiar inner solar system…

地球与行星天体物理 · 物理学 2022-10-12 Matthew S. Clement , Rogerio Deienno , Andre Izidoro

Disk vortices, seen in numerical simulations of protoplanetary disks and found observationally in ALMA and VLA images of these objects, are promising sites for planet formation given their pebble trapping abilities. Previous works have…

地球与行星天体物理 · 物理学 2024-06-27 Wladimir Lyra , Chao-Chin Yang , Jacob B. Simon , Orkan M. Umurhan , Andrew N. Youdin

Super-Earths are found in tighter orbits than the Earth's around more than one third of main sequence stars. It has been proposed that super-Earths are scaled-up terrestrial planets that formed similarly, through mutual accretion of…

Nearly $15-20%$ of solar type stars contain one or more gas giant planet. According to the core-accretion scenario, the acquisition of their gaseous envelope must be preceded by the formation of super-critical cores with masses ten times or…

地球与行星天体物理 · 物理学 2015-06-23 Beibei Liu , Xiaojia Zhang , Douglas N. C. Lin , Sverre J. Aarseth

During the late stage of planet formation when Mars-size cores appear, interactions among planetary cores can excite their orbital eccentricities, speed their merges and thus sculpture the final architecture of planet systems. This series…

地球与行星天体物理 · 物理学 2015-03-13 Huigen Liu , Ji-lin Zhou , S. Wang

The process of gap formation by a growing planetary embryo embedded in a planetesimal disk is considered. It is shown that there exists a single parameter characterizing this process, which represents the competition between the…

天体物理学 · 物理学 2009-11-06 Roman R. Rafikov

Planets grow via the collisional accretion of small bodies in a protoplanetary disk. Such small bodies feel strong gas drag and their orbits are significantly affected by the gas flow and atmospheric structure around the planet. We…

地球与行星天体物理 · 物理学 2021-08-24 Tatsuya Okamura , Hiroshi Kobayashi

We present N-body simulations of planetary accretion beginning with 1 km radius planetesimals in orbit about a 1 solar mass star at 0.4 AU. The initial disk of planetesimals contains too many bodies for any current N-body code to integrate;…

地球与行星天体物理 · 物理学 2015-05-13 Rory Barnes , Thomas R. Quinn , Jack J. Lissauer , Derek C. Richardson

We present the results of hydrodynamic simulations of the formation and subsequent orbital evolution of giant planets embedded in a circumbinary disc. We assume that a 20 earth masses core has migrated to the edge of the inner cavity formed…

天体物理学 · 物理学 2009-11-13 Arnaud Pierens , Richard P. Nelson

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…

地球与行星天体物理 · 物理学 2019-12-18 Matthäus Schulik , Anders Johansen , Bertram Bitsch , Elena Lega

Modern terrestrial planet formation models are highly successful at consistently generating planets with masses and orbits analogous to those of Earth and Venus. In stark contrast to classic theoretical predictions and inferred demographics…

地球与行星天体物理 · 物理学 2021-06-23 Matthew S. Clement , John E. Chambers

At least 30\% of main sequence stars host planets with sizes of between 1 and 4 Earth radii and orbital periods of less than 100 days. We use N-body simulations including a model for gas-assisted pebble accretion and disk--planet tidal…

Recent observations from NASA's Kepler mission detected the first planets in circumbinary orbits. The question we try to answer is where these planets formed in the circumbinary disk and how far inside they migrated to reach their present…

地球与行星天体物理 · 物理学 2015-06-15 Francesco Marzari , Philippe Thebault , Hans Scholl , G. Picogna , Clement Baruteau

We compute the maximum mass a growing planetary embryo can reach depending on the size of accreted planetesimals or pebbles, to infer the possibility of growing the cores of giant planets, and giant planets themselves. We compute the…

地球与行星天体物理 · 物理学 2017-10-11 Yann Alibert

The discovery of exoplanets in binary star systems-now numbering about 850 of the nearly 4,600 known exoplanet systems-raises questions about whether observational bias or stellar companions inhibit planet formation. While most studies on…

地球与行星天体物理 · 物理学 2025-12-19 Maximilian Zimmermann , Elke Pilat-Lohinger

Observations and models of giant planets indicate that such objects are enriched in heavy elements compared to solar abundances. The prevailing view is that giant planets accreted multiple Earth masses of heavy elements after the end of…

地球与行星天体物理 · 物理学 2022-05-18 Linn E. J. Eriksson , Thomas Ronnet , Anders Johansen , Ravit Helled , Claudio Valletta , Antoine C. Petit

We report on the stability of hypothetical Super-Earths in the habitable zone of known multi-planetary systems. Most of them have not yet been studied in detail concerning the existence of additional low-mass planets. The new N-body code…

地球与行星天体物理 · 物理学 2015-06-16 S. Elser , S. L. Grimm , J. G. Stadel

Giant planets have been discovered at large separations from the central star. Moreover, a striking number of young circumstellar disks have gas and/or dust gaps at large orbital separations, potentially driven by embedded planetary…

地球与行星天体物理 · 物理学 2022-07-08 Hans Baehr , Zhaohuan Zhu , Chao-Chin Yang

In their model for the origin of the parent bodies of iron meteorites, Bottke et al proposed differentiated planetesimals that were formed in the region of 1-2 AU during the first 1.5 Myr, as the parent bodies, and suggested that these…

地球与行星天体物理 · 物理学 2015-06-04 Nader Haghighipour , Edward R. D. Scott

Context: Planetary embryos can continue to grow by pebble accretion until they become giant planet cores. Simultaneously, these embryos mutually interact and also migrate due to torques arising from the protoplanetary disk. Aims: Our aim is…

地球与行星天体物理 · 物理学 2017-10-25 Ondřej Chrenko , Miroslav Brož , Michiel Lambrechts