Cited by 73Astro and Planetary ScienceSpace Satellite Systems and ControlStellar, planetary, and galactic studies

THE POPULATION OF PROPELLERS IN SATURN'S A RING

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Tiscareno, Matthew S., Burns, Joseph A., Hedman, Matthew M., C. Porco, Carolyn·2008·The Astronomical Journal

Abstract

We present an extensive data set of ∼150 localized features from Cassini images of Saturn's A ring, a third of which are demonstrated to be persistent by their appearance in multiple images, and half of which are resolved well enough to reveal a characteristic "propeller" shape. We interpret these features as the signatures of small moonlets embedded within the ring, with diameters between 40 and 500 m. The lack of significant brightening at high phase angle indicates that they are likely composed primarily of macroscopic particles, rather than dust. With the exception of two features found exterior to the Encke Gap, these objects are concentrated entirely within three narrow (∼1000 km) bands in the mid-A ring that happen to be free from local disturbances from strong density waves. However, other nearby regions are similarly free of major disturbances but contain no propellers. It is unclear whether these bands are due to specific events in which a parent body or bodies broke up into the current moonlets, or whether a larger initial moonlet population has been sculpted into bands by other ring processes.

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Crossref · 10.1088/0004-6256/135/3/1083

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  • Propeller moonlets with Hill radii less than r_gap ≈ 2 km should experience slow, embedded migration with radial drift rates below 10 m yr^-1.

    “With Hill radii less than r gap ≈ 2 km (Tiscareno et al. 2008), the propeller moonlets should experience slow, embedded migration with radial drift rates below 10 m yr -1 (Figure 2).”

    From MIGRATION OF SMALL MOONS IN SATURN's RINGS (2013) · cites this paper as Tiscareno et al. 2008

  • Moonlets have a range of sizes up to about r_H ∼ 1.5 km.

    “Moonlets have a range of sizes up to about r H ∼ 1.5 km (Tiscareno et al. 2008(Tiscareno et al. , 2010)).”

    From MIGRATION OF SMALL MOONS IN SATURN's RINGS (2013) · cites this paper as Tiscareno et al. 2008

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Authors
Tiscareno, M. S., Burns, J. A., Hedman, M. M., & C. Porco, C.
Affiliations
Cornell University (US)
Corresponding author
  • Tiscareno, Matthew S.
  • Hedman, Matthew M.
Venue
The Astronomical Journal
Published
2008-02-14
Volume
135
Issue
3
Pages
1083-1091
ISSN
  • 0004-6256 (ISSN-L)
  • 1538-3881
OpenAlex
W2149941898
Cited by
73
References
29
Citations by year
2024: 3 · 2022: 1 · 2019: 5 · 2018: 7 · 2017: 4 · 2016: 2 · 2015: 4 · 2014: 4 · 2013: 6 · 2012: 7
FWCI
5.64
Type
journal article
Language
en
Open access
Locations
  • The Astronomical Journal (publishedVersion)
  • arXiv (Cornell University) (submittedVersion)
  • arXiv (Cornell University)
  • AAS/Division for Planetary Sciences Meeting Abstracts #39
Funders
  • National Aeronautics and Space Administration
  • Fundação para a Ciência e a Tecnologia
Topics
  • Physical Sciences › Physics and Astronomy › Astronomy and Astrophysics › Astro and Planetary Science
  • Physical Sciences › Engineering › Aerospace Engineering › Space Satellite Systems and Control
  • Physical Sciences › Physics and Astronomy › Astronomy and Astrophysics › Stellar, planetary, and galactic studies
Keywords
Cassini imaging, ring dynamics

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