On the Tidal Environment of an Outwardly Migrating F Ring
Open accessAbstract
Saturn's F ring is a unique narrow ring that lies (radially) close to the tidally disruptive Roche limit of water ice for Saturn. Significant work has been done that shows it to be one of the most dynamic places in the Solar system. Aggregates that are fortunate enough to form constantly battle against the strong tidal forces of Saturn and the nearby moons Prometheus and Pandora, which act to gravitationally stir up ring material. Planetary rings are also known to radially spread. Therefore, as the F ring lies at the edge of the main rings, we investigate the effect of an outwardly migrated F ring and its interaction with Prometheus. An increase in the maximum number density of particles at the channel edges is observed with decreasing local tidal environment. Radial velocity dispersions are also observed to fall below the typical escape velocity of a |$150\,{\rm m}$| icy moonlet (|${\lt}10\ {\rm cm}\ {\rm s^{ - 1}}$|) where density is enhanced, and are gravitationally unstable with Toomre parameters |$Q \lt 2$|. Additionally, in locations of the ring where |$Q \lt 2$| is observed, more particles are seen to fall below or close to the critical Toomre parameter as the radial location of the ring increases.
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Observations and models suggest moonlets can still form due to localised gravitational instabilities in Saturn's F ring.
“Yet, observations and models (Beurle et al., 2010;Sutton 2018) suggest moonlets can still form due to localised gravitational instabilities.”
From A Self-Gravitating Exoring Around J1407b and Implications for In-Situ Exomoon Formation (2022) · cites this paper as Sutton 2018
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Cited by
Sorted by citations
Sutton, P. J. (2019) · Monthly Notices of the Royal Astronomical Society · doi:10.1093/mnras/stz563 · Cited by 5 · see citing works
“This could be analogous to Saturn’s F ring where a nearby moon Prometheus disrupts the F ring causing local gravitational instabilities and subsequent small moonlets, which were found by the Cassini spacecraft (Murray et al 2005; Beurle et al 2010; Sutton 2018).”
BackgroundSelf-citationA Self-Gravitating Exoring Around J1407b and Implications for In-Situ Exomoon Formation
Sutton, P. J., Albery, B., & Muff, J. (2022) · Frontiers in Astronomy and Space Sciences · doi:10.3389/fspas.2022.819933 · Cited by 2 · see citing works
“Yet, observations and models (Beurle et al., 2010; Sutton 2018) suggest moonlets can still form due to localised gravitational instabilities.”
Self-citation
- Authors
- Sutton, P. J.
- Affiliations
- University of Lincoln (GB)
- Corresponding author
- Sutton, Phil J
- ORCID
- Sutton, Phil J
- Venue
- Monthly Notices of the Royal Astronomical Society
- Publisher
- Oxford University Press (OUP)
- Published
- 2018-06-01
- Volume
- 478
- Issue
- 1
- Pages
- 416-424
- ISSN
- 0035-8711 (ISSN-L)
- 1365-2966
- OpenAlex
- W2795676708
- Cited by
- 2
- References
- 42
- Citations by year
- 2022: 1 · 2019: 1
- FWCI
- 0.13
- Type
- journal article
- Language
- en
- Open access
- green
- arxiv.org
- Locations
- Monthly Notices of the Royal Astronomical Society (publishedVersion)
- Lincoln Repository (University of Lincoln) (acceptedVersion)
- arXiv (Cornell University) (submittedVersion)
- Figshare (submittedVersion, cc-by)
- arXiv (Cornell University)
- Topics
- Physical Sciences › Physics and Astronomy › Astronomy and Astrophysics › Astro and Planetary Science
- Physical Sciences › Physics and Astronomy › Astronomy and Astrophysics › Stellar, planetary, and galactic studies
- Physical Sciences › Engineering › Aerospace Engineering › Space Satellite Systems and Control
- Keywords
- Saturn F ring, tidal environments, Prometheus, ring-moon interactions, Roche limit, radial velocity dispersion, Toomre Q parameter, gravitational instability
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