The Open UniversitySkip to content
 

Episodes of particle ejection from the surface of the active asteroid (101955) Bennu

Lauretta, D. S.; Hergenrother, C. W.; Chesley, S. R.; Leonard, J. M.; Pelgrift, J. Y.; Adam, C. D.; Al Asad, M.; Antreasian, P. G.; Ballouz, R.-L.; Becker, K. J.; Bennett, C. A.; Bos, B. J.; Bottke, W. F.; Brozovic, M.; Campins, H.; Connolly Jr., H. C.; Daly, M. G.; Davis, A. B.; de Leon, J.; DellaGiustina, D. N.; Drouet d'Aubigny, C. Y.; Dworkin, J. P.; Emery, J. P.; Farnocchia, D.; Glavin, D. P.; Golish, D. R.; Hartzell, C. M.; Jacobson, R. A.; Jawin, E. R.; Jenniskens, P.; Kidd Jr., J. N.; Lessac-Chenen, E. J.; Li, J.-Y.; Libourel, G.; Licandro, J.; Liounis, A. J.; Maleszewski, C. K.; Manzoni, C.; May, B.; McCarthy, L. K.; McMahon, J.; Michel, P.; Molaro, J. L.; Moreau, M. C.; Nelson, D. S.; Owen Jr., W. M.; Rizk, B.; Roper, H. L.; Rozitis, B.; Sahr, E. M.; Scheeres, D. J.; Seabrook, J. A.; Selznick, S. H.; Takahashi, Y.; Thuillet, F.; Tricarico, P.; Vokrouhlicky, D. and Wolner, C. W. V. (2019). Episodes of particle ejection from the surface of the active asteroid (101955) Bennu. Science, 366(6470), article no. eaay3544.

Full text available as:
Full text not publicly available (Accepted Manuscript)
Due to publisher licensing restrictions, this file is not available for public download until 6 June 2020
Click here to request a copy from the OU Author.
DOI (Digital Object Identifier) Link: https://doi.org/10.1126/science.aay3544
Google Scholar: Look up in Google Scholar

Abstract

Active asteroids are those that show evidence of ongoing mass loss. We report repeated instances of particle ejection from the surface of (101955) Bennu, demonstrating that it is an active asteroid. The ejection events were imaged by the OSIRIS-REx (Origins, Spectral Interpretation, Resource Identification, and Security-Regolith Explorer) spacecraft. For the three largest events, we estimated the ejected particle velocities and sizes, event times, source regions, and energies. We also determined the trajectories and photometric properties of several gravitationally bound particles that orbited temporarily in the Bennu environment. We consider multiple hypotheses for the mechanisms that lead to particle ejection for the largest events, including rotational disruption, electrostatic lofting, ice sublimation, phyllosilicate dehydration, meteroid impacts, thermal stress fracturing, and secondary impacts.

Item Type: Journal Item
Copyright Holders: 2019 The Authors
ISSN: 1095-9203
Project Funding Details:
Funded Project NameProject IDFunding Body
Not SetNot SetRoyal Astronomical Society (RAS)
Not SetNot SetUK Science and Technology Facilities Council (STFC)
Academic Unit/School: Faculty of Science, Technology, Engineering and Mathematics (STEM) > Physical Sciences
Faculty of Science, Technology, Engineering and Mathematics (STEM)
Research Group: Astronomy
Space
Item ID: 68479
Depositing User: Benjamin Rozitis
Date Deposited: 11 Dec 2019 15:58
Last Modified: 21 Dec 2019 15:44
URI: http://oro.open.ac.uk/id/eprint/68479
Share this page:

Metrics

Altmetrics from Altmetric

Citations from Dimensions

Actions (login may be required)

Policies | Disclaimer

© The Open University   contact the OU