Evidence for a recent collision in saturn's irregular moon population

8Citations
Citations of this article
5Readers
Mendeley users who have this article in their library.

Abstract

Using CFHT imaging data, we searched a 1.1 deg2 field on each side of Saturn down to magnitude mw ; 26.3, corresponding to diameters of D ; 3 km. We detected 120 objects, which were comoving with Saturn and are nearly certainly irregular moons. For example, all but one of our detections brighter than magnitude 25.5 link to known Saturnian irregulars, with 40 linkages that thus extend the orbital arc of previous discoveries. Extrapolating our sample's characterized detections (those for which we can debias the search) to the entire Saturnian irregular population, we estimate that there are 150 ± 30 moons down to D = 2.8 km, which is approximately three times as many irregular moons as Jupiter down to the same size. At the smallest sizes, from D = 3.8 down to 2.8 km, we find that the Saturnian irregular population exhibits a steep size distribution of the differential power-law index = - q 4.9+0.6 0.7. We believe this steep size distribution is the signature of a relatively recent (few hundred Myr ago) collisional event in Saturn's retrograde irregular population.

Cite

CITATION STYLE

APA

Ashton, E., Gladman, B., & Beaudoin, M. (2021). Evidence for a recent collision in saturn’s irregular moon population. Planetary Science Journal, 2(4). https://doi.org/10.3847/PSJ/ac0979

Register to see more suggestions

Mendeley helps you to discover research relevant for your work.

Already have an account?

Save time finding and organizing research with Mendeley

Sign up for free