A Spiral Structure in the Inner Oort Cloud
David Nesvorny, Luke Dones, David Vokrouhlicky, Hal F. Levison,, Cristian Beauge, Jacqueline Faherty, Carter Emmart, Jon P. Parker
TL;DR
This paper explores the formation and persistence of a spiral structure in the inner Oort cloud caused by Galactic tides, discussing its dynamics and the challenges in observing it.
Contribution
It introduces the concept of a long-lived spiral structure in the inner Oort cloud driven by Galactic tides, which has not been previously characterized.
Findings
The spiral structure extends about 15,000 au in length.
The spiral is long-lived and persists to the present.
Observational detection prospects are limited due to its faintness.
Abstract
As the Galactic tide acts to decouple bodies from the scattered disk it creates a spiral structure in physical space that is roughly 15,000 au in length. The spiral is long-lived and persists in the inner Oort cloud to the present time. Here we discuss dynamics underlying the Oort spiral and (feeble) prospects for its observational detection.
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Taxonomy
TopicsSolar and Space Plasma Dynamics · Astro and Planetary Science · Astrophysics and Star Formation Studies