Late origin of the Saturn system

Asphaug, Erik; Reufer, A.

doi:10.1016/j.icarus.2012.12.009

Cited by 101 publications

(86 citation statements)

References 140 publications

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“…In a way analogous to the standard model of terrestrial planet formation (e.g. Chambers and Wetherill, 1998;Agnor et al, 1999), the satellites likely formed from the accretion of large ice-rock blocks up to more than 100 km in radius (e.g Asphaug and Reufer, 2013 probably occurred during this accretional phase, and the satellites we observe today around Saturn are the ones that survived this violent period. The irregularly shaped satellite Hyperion may be considered as a remnant of this accretion process (e.g.…”

Section: Despinning By Giant Impactsupporting

confidence: 56%

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Despinning and shape evolution of Saturn’s moon Iapetus triggered by a giant impact

Kuchta

Tobie

Miljković

et al. 2015

Icarus

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Section: Despinning By Giant Impactsupporting

confidence: 56%

“…Mosqueira et al, 2010;Levison et al, 2011;Sekine and Genda, 2012;Zhang and Nimmo, 2012;Asphaug and Reufer, 2013). In a way analogous to the standard model of terrestrial planet formation (e.g.…”

Section: Despinning By Giant Impactmentioning

confidence: 99%

Despinning and shape evolution of Saturn’s moon Iapetus triggered by a giant impact

Kuchta

Tobie

Miljković

et al. 2015

Icarus

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“…This would include giant impacts between proto-satellites, and such impacts may explain the origin of the otherwise mysterious middle-sized moons (those ∼500-1500 km in diameter) of Saturn (Sekine and Genda 2012;Asphaug and Reufer 2013). In this scenario Saturn would have started out with a system of larger satellites like the Galilean moons of Jupiter, but whereas in the Jovian system these moons remained locked in a stable Laplace resonance, in the Saturnian system they became unstable and collided, with the present middle-sized moons representing the remnants of this former satellite population.…”

Section: Middle-sized Moons Of Saturnmentioning

confidence: 99%

Insights into Planet Formation from Debris Disks

Wyatt

Jackson

2016

Space Sci Rev

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Giant impacts refer to collisions between two objects each of which is massive enough to be considered at least a planetary embryo. The putative collision suffered by the proto-Earth that created the Moon is a prime example, though most Solar System bodies bear signatures of such collisions. Current planet formation models predict that an epoch of giant impacts may be inevitable, and observations of debris around other stars are providing mounting evidence that giant impacts feature in the evolution of many planetary systems. This chapter reviews giant impacts, focussing on what we can learn about planet formation by studying debris around other stars. Giant impact debris evolves through mutual collisions and dynamical interactions with planets. General aspects of this evolution are outlined, noting the importance of the collision-point geometry. The detectability of the debris is discussed using the example of the Moon-forming impact. Such debris could be detectable around another star up to 10 Myr post-impact, but model uncertainties could reduce detectability to a few 100 yr window. Nevertheless the 3 % of young stars with debris at levels expected during terrestrial planet formation provide valuable constraints on formation models; implications for super-Earth formation are also discussed. Variability recently observed in some bright disks promises to illuminate the evolution during the earliest phases when vapour condensates may be optically thick and acutely affected by the collision-point geometry. The outer reaches of planetary systems may also exhibit signatures of giant impacts, such as the clumpy debris structures seen around some stars.

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“…Secondary debris resulting from a giant impact in the system of Saturn (e.g. Levison et al, 2011;Asphaug and Reufer, 2013) could possibly provide a source of small impactors (Nakamura and Fujiwara, 1991). As suggested by Farinella et al (1997) and Dobrovolskis and Lissauer (2004), Hyperion may have resulted from such giant impacts.…”

Section: Discussionmentioning

confidence: 99%