The Library
Gigayear-timescale destruction of high-eccentricity asteroids by spin and why 2006 HY51 has been spared
Tools
Makarov, Valeri V., Goldin, Alexey and Veras, Dimitri (2020) Gigayear-timescale destruction of high-eccentricity asteroids by spin and why 2006 HY51 has been spared. The Astrophysical Journal, 899 (2). 103. doi:10.3847/1538-4357/aba89e ISSN 0004-637X.
|
PDF
WRAP-gigayear-timescale-destruction-high-eccentricity-asteroids-spin-why-2006-HY51-Veras-2020.pdf - Accepted Version - Requires a PDF viewer. Download (7Mb) | Preview |
Official URL: https://doi.org/10.3847/1538-4357/aba89e
Abstract
Asteroids and other small celestial bodies have markedly prolate shapes, and the perturbative triaxial torques that are applied during pericenter passages in highly eccentric orbits trigger and sustain a state of chaotic rotation. Because the prograde spin rate around the principal axis of inertia is not bounded from above, it can accidentally reach the threshold value corresponding to rotational breakup. Previous investigations of this process were limited to integrations of ~103 orbits because of the stiff equation of motion. We present here a fast 1D simulation method to compute the evolution of this spin rate over ~109 orbits. We apply the method to the most eccentric solar system asteroid known, 2006 HY51 (with e = 0.9684), and find that for any reasonably expected shape parameters it can never be accelerated to breakup speed. However, primordial solar system asteroids on more eccentric orbits may have already broken up from this type of rotational fission. The method also represents a promising opportunity to investigate the long-term evolution of extremely eccentric triaxial exo-asteroids (e > 0.99), which are thought to be common in white dwarf planetary systems.
Item Type: | Journal Article | ||||||
---|---|---|---|---|---|---|---|
Subjects: | Q Science > QB Astronomy | ||||||
Divisions: | Faculty of Science, Engineering and Medicine > Science > Physics | ||||||
Library of Congress Subject Headings (LCSH): | Asteroids, Celestial mechanics | ||||||
Journal or Publication Title: | The Astrophysical Journal | ||||||
Publisher: | Institute of Physics Publishing, Inc. | ||||||
ISSN: | 0004-637X | ||||||
Official Date: | 18 August 2020 | ||||||
Dates: |
|
||||||
Volume: | 899 | ||||||
Number: | 2 | ||||||
Article Number: | 103 | ||||||
DOI: | 10.3847/1538-4357/aba89e | ||||||
Status: | Peer Reviewed | ||||||
Publication Status: | Published | ||||||
Reuse Statement (publisher, data, author rights): | This is an author-created, un-copyedited version of an article published in The Astrophysical Journal. IOP Publishing Ltd is not responsible for any errors or omissions in this version of the manuscript or any version derived from it. The Version of Record is available online at http://dx.doi.org/10.3847/1538-4357/aba89e | ||||||
Access rights to Published version: | Restricted or Subscription Access | ||||||
Date of first compliant deposit: | 7 September 2020 | ||||||
Date of first compliant Open Access: | 18 August 2021 | ||||||
RIOXX Funder/Project Grant: |
|
Request changes or add full text files to a record
Repository staff actions (login required)
View Item |
Downloads
Downloads per month over past year