Results 101 to 110 of about 16,853 (286)

Dust Evolution and the Formation of Planetesimals [PDF]

Space Science Reviews, 2016
The solid content of circumstellar disks is inherited from the interstellar medium: dust particles of at most a micrometer in size. Protoplanetary disks are the environment where these dust grains need to grow at least 13 orders of magnitude in size. Our understanding of this growth process is far from complete, with different physics seemingly posing ...
Anders Johansen, Tilman Birnstiel, Tilman Birnstiel, M. Fang   +3 more
openaire   +4 more sources

Ferromagmatic Intrusions on Asteroid (16) Psyche May Be Magnetized

Journal of Geophysical Research: Planets, Volume 130, Issue 8, August 2025.
Abstract NASA's Psyche mission will arrive at the metal‐rich asteroid (16) Psyche in 2029. The mission will test whether (16) Psyche is a remnant of a melted, differentiated planetesimal that formed a molten iron metallic core. Previous studies have suggested that a molten metallic core fluid could erupt volcanically, explaining the high metal content ...
Samuel W. Courville, Hannah R. Sanderson, Carver J. Bierson, Linda T. Elkins‐Tanton, Rona Oran, Joseph G. O'Rourke, Christopher T. Russell, Benjamin P. Weiss, David A. Williams   +8 more
wiley   +1 more source

Formation of pebble-pile planetesimals [PDF]

Astronomy & Astrophysics, 2014
The first stage of planet formation is the accumulation of dust and ice grains into mm-cm-sized pebbles. These pebbles can clump together through the streaming instability and form gravitationally bound pebble 'clouds'. Pebbles inside such a cloud will undergo mutual collisions, dissipating energy into heat.
Karl Wahlberg Jansson, Anders Johansen
openaire   +3 more sources

Fast accretion of small planetesimals by protoplanetary cores

, 2003
We explore the dynamics of small planetesimals coexisting with massive protoplanetary cores in a gaseous nebula. Gas drag strongly affects the motion of small bodies leading to the decay of their eccentricities and inclinations, which are excited by the ...
Greenberg J. M., Hasegawa M., Ida S., R. R. Rafikov, Weidenschilling S. J.   +4 more
core   +2 more sources

Steady-state evolution of debris disks around A stars [PDF]

, 2007
In this paper a simple analytical model for the steady-state evolution of debris disks due to collisions is confronted with Spitzer observations of main sequence A stars.
Augereau J. C., C. A. Beichman, Dohnanyi J., G. Bryden, G. H. Rieke, J. S. Greaves, K. Y. L. Su, M. C. Wyatt, Quillen A. C., R. Smith, Wyatt M. C.   +10 more
core   +2 more sources

Exploring the conditions for forming cold gas giants through planetesimal accretion [PDF]

Astronomy & Astrophysics, 2019
The formation of cold gas giants similar to Jupiter and Saturn in orbit and mass is a great challenge for planetesimal-driven core accretion models because the core growth rates far from the star are low.
A. Johansen, B. Bitsch
semanticscholar   +1 more source

The Influence of Interior Structure and Thermal State on Impact Melt Generation Upon Large Impacts Onto Terrestrial Planets

Journal of Geophysical Research: Planets, Volume 130, Issue 7, July 2025.
Abstract We investigate the melt production of planetary impacts as a function of planet size (R/REarth $R/{R}_{\text{Earth}}$ = 0.1–1.5), impactor size (L $L$ = 1–1,000 km), and core size ratio (Rcore/R ${R}_{\text{core}}/R$ = 0.2–0.8) using a combination of parameterized convection models and fully dynamical 2D impact simulations.
Lukas Manske, Thomas Ruedas, Ana‐Catalina Plesa, Philipp Baumeister, Nicola Tosi, Natalia Artemieva, Kai Wünnemann   +6 more
wiley   +1 more source

Streaming instability on different scales – I. Planetesimal mass distribution variability [PDF]

, 2020
We present numerical simulations of dust clumping and planetesimal formation initiated by the streaming instability with self-gravity. We examine the variability in the planetesimal formation process by employing simulation domains with large radial and ...
J. Rucska, J. Wadsley
semanticscholar   +1 more source

Silicate–sulfide interaction within quenched melts of space weathered Ryugu grains

Meteoritics &Planetary Science, Volume 60, Issue 7, Page 1480-1501, July 2025.
Abstract The first few microns of the surface of airless bodies are subject to severe changes due to the harsh environment of space, known as space weathering. The Hayabusa2 sample return mission from the asteroid Ryugu provides the first opportunity to study these effects on a carbonaceous and hydrated body.
Sylvain Laforet, Hugues Leroux, Corentin Le Guillou, Maya Marinova, Adrien Néri, Adrien Teurtrie, Francisco de la Peña, Damien Jacob, Alexandre Fadel, David Troadec   +9 more
wiley   +1 more source

Planet Formation In Highly Inclined Binary Systems I. Planetesimals Jump Inwards And Pile Up

, 2011
Most detected planet-bearing binaries are in wide orbits, for which a high inclination, $i_B$, between the binary orbital plane and the plane of the planetary disk around the primary is likely to be common.
Armitage, Chatterjee, Cieza, Cuzzi, Cuzzi, Duchêne, Duquennoy, Eggenberger, Fabrycky, Giuppone, Guedes, Haghighipour, Haghighipour, Hatzes, Heppenheimer, Holman, Ida, Jensen, Ji-Lin Zhou, Ji-Wei Xie, Jian Ge, Kley, Kokubo, Larwood, Lee, Levison, Lithwick, Marzari, Mathieu, Matthew J. Payne, Monin, Natta, Pascucci, Philippe Thébault, Prša, Queloz, Quintana, Quintana, Rafikov, Rafikov, Safronov, Slawson, Stewart, Takeda, Takeuchi, Weidenschilling, Weidenschilling, Wu, Wu, Xie, Xie, Xie, Xie, Youdin, Youdin, Youdin, Youdin   +56 more
core   +2 more sources