Results 11 to 20 of about 1,062,553 (301)
Planetesimal rings as the cause of the Solar System’s planetary architecture [PDF]
Nature Astronomy, 2021 Astronomical observations reveal that protoplanetary disks around young stars commonly have ring- and gap-like structures in their dust distributions. These features are associated with pressure bumps trapping dust particles at specific locations, which ...
A. Izidoro +5 more
semanticscholar +1 more source
Origin and Formation of Planetary Systems [PDF]
Astrobiology, 2010 To estimate the occurrence of terrestrial exoplanets and maximize the chance of finding them, it is crucial to understand the formation of planetary systems in general and that of terrestrial planets in particular. We show that a reliable formation theory should not only explain the formation of the Solar System, with small terrestrial planets within a
Alibert, Y. +25 more
openaire +6 more sources
Spin–Orbit Alignment of the β Pictoris Planetary System [PDF]
Astrophysical Journal, 2020 A crucial diagnostic that can tell us about processes involved in the formation and dynamical evolution of planetary systems is the angle between the rotation axis of a star and a planet's orbital angular momentum vector (“spin–orbit” alignment or ...
S. Kraus +8 more
semanticscholar +1 more source
Implications for Planetary System Formation from Interstellar Object 1I/2017 U1 (‘Oumuamua) [PDF]
, 2017 The recently discovered minor body 1I/2017 U1 (‘Oumuamua) is the first known object in our solar system that is not bound by the Sun’s gravity. Its hyperbolic orbit (eccentricity greater than unity) strongly suggests that it originated outside our solar ...
D. Trilling +8 more
semanticscholar +1 more source
PLANETARY SYSTEM FORMATION IN THE PROTOPLANETARY DISK AROUND HL TAURI [PDF]
, 2015 We reprocess the Atacama Large Millimeter/Submillimeter Array (ALMA) long-baseline science verification data taken toward HL Tauri. Assuming the observed gaps are opened up by currently forming, unseen bodies, we estimate the mass of such hypothetical ...
E. Akiyama +3 more
semanticscholar +1 more source
Planetary formation in the Gamma-Cephei system [PDF]
Astronomy & Astrophysics, 2004 We numerically investigate under which conditions the planet detected at 2.1 AU of Gamma-Cephei could form through the core-accretion scenario despite the perturbing presence of the highly eccentric companion star. We first show that the initial stage of runaway accretion of kilometer-sized planetesimals is possible within 2.5 AU from the central star ...
Thébault, Philippe +4 more
openaire +4 more sources
The formation of planetary systems [PDF]
Monthly Notices of the Royal Astronomical Society, 2004 In an embedded cluster, with high stellar densities, interactions can occur between stars and either newly formed diffuse protostars or high-density regions produced by the collision of turbulent elements. It is shown by smoothed particle hydrodynamics (SPH) modelling that interactions can occur in which the complete protostar, or high-density region ...
S. Oxley, M. M. Woolfson
openaire +1 more source
Theoretical models of planetary system formation: mass vs. semi-major axis [PDF]
, 2013 Context. Planet formation models have been developed during the past years to try to reproduce what has been observed of both the solar system and the extrasolar planets.
Y. Alibert +6 more
semanticscholar +1 more source
Rules of formation of H–C–N–O compounds at high pressure and the fates of planetary ices
Proceedings of the National Academy of Sciences of the United States of America, 2021 Significance The planetary ices water, methane, and ammonia, deep inside icy planets, are subject to compression work that matches chemical bond energies. Icy mixtures are then free to form entirely new compounds, based on the energy landscape of the H–C–
L. Conway, Chris J. Pickard, A. Hermann
semanticscholar +1 more source
Global models of planetary system formation in radiatively-inefficient protoplanetary discs [PDF]
, 2011 We present the results of N-body simulations of planetary system formation in radiatively-inefficient disc models, where positive corotation torques may counter the rapid inward migration of low-mass planets driven by Lindblad torques.
Phil Hellary, R. Nelson
semanticscholar +1 more source