Cassini microwave observations provide clues to the origin of Saturn's C ring
详细信息 查看全文
- 作者：Z. Zhanga ; zz246@cornell.edu" class="auth_mail" title="E-mail the corresponding author ; A.G. Hayesa ; M.A. Janssenb ; P.D. Nicholsona ; J.N. Cuzzic ; I. de Paterd ; D.E. Dunne ; P.R. Estradac ; f ; M.M. Hedmang
- 关键词：Saturn ; rings ; Planetary rings ; Radar observations ; Origin ; Solar system
- 刊名：Icarus
- 出版年：2017
- 出版时间：1 January 2017
- 年：2017
- 卷：281
- 期：Complete
- 页码：297-321
- 全文大小：5076 K
文摘
- stitem" id="list_celist0001">
- •
High observed brightness at near-zero azimuth, imply particles are 70–75% porous.
- •
Intramixed non-icy fractions are generally 1–2%, but reach 6–11% in the mid C ring.
- •
1–2% fraction in most of C ring is consistent with 15–90 Myr pollution time scale.
- •
We propose a tidally disrupted Centaur as the source of the mid C ring distribution.
- •
A core-mantle model best accounts for the mid C ring emission and very low opacity.