Pre-encounter Predictions of DART Impact Ejecta Behavior and Observability
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Título: | Pre-encounter Predictions of DART Impact Ejecta Behavior and Observability |
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Autor/es: | Fahnestock, Eugene G. | Cheng, Andy F. | Ivanovski, Stavro | Michel, Patrick | Raducan, Sabina D. | Rossi, Alessandro | Abell, Paul | Chesley, Steven | Dotto, Elisabetta | Ferrari, Fabio | Kolokolova, Ludmilla | Kramer, Emily | Li, Jian-Yang | Schwartz, Stephen R. | Soldini, Stefania | Tancredi, Gonzalo | Campo Bagatin, Adriano | Zhang, Yun |
Grupo/s de investigación o GITE: | Astronomía y Astrofísica |
Centro, Departamento o Servicio: | Universidad de Alicante. Departamento de Física, Ingeniería de Sistemas y Teoría de la Señal | Universidad de Alicante. Instituto Universitario de Física Aplicada a las Ciencias y las Tecnologías |
Palabras clave: | Impact phenomena | Asteroids | Near-Earth objects | Planetary science | Ejecta | N-body simulations | Astronomical simulations |
Fecha de publicación: | 1-sep-2022 |
Editor: | IOP Publishing |
Cita bibliográfica: | The Planetary Science Journal. 2022, 3:206. https://doi.org/10.3847/PSJ/ac7fa1 |
Resumen: | We overview various efforts within the DART Investigation Team's Ejecta Working Group to predict the characteristics, quantity, dynamical behavior, and observability of DART impact ejecta. We discuss various methodologies for simulation of the impact/cratering process with their advantages and drawbacks in relation to initializing ejecta for subsequent dynamical propagation through and away from the Didymos system. We discuss the most relevant forces acting on ejecta once decoupled from Dimorphos's surface and highlight various software packages we have developed and used to dynamically simulate ejecta under the action of those forces. With some additional software packages, we explore the influence of additional perturbing effects, such as interparticle collisions within true N-body codes and nonspherical and rotating particles' interplay with solar radiation pressure. We find that early-timescale and close-proximity ejecta evolution is highly sensitive to some of these effects (e.g., collisions) while relatively insensitive to other factors. We present a methodology for turning the time-evolving size- and spatially discretized number density field output from ejecta simulations into synthetic images for multiple platforms/cameras over wide-ranging vantage points and timescales. We present such simulated images and apply preliminary analyses to them for nominal and off-nominal cases bracketing realistic total mass of ejecta and ejecta cumulative size–frequency distribution slope. Our analyses foreshadow the information content we may be able to extract from the actual images taken during and after the DART encounter by both LICIACube and Earth-vicinity telescopes. |
Patrocinador/es: | This work was supported in part by the DART mission, NASA contract No. 80MSFC20D0004 to JHU/APL. Some of this work was carried out at the Jet Propulsion Laboratory, California Institute of Technology, under a contract with the National Aeronautics and Space Administration (80NM0018D0004). P.M., S.D.R., and Y.Z. acknowledge funding support from the European Union's Horizon 2020 research and innovation program under grant agreement No. 870377 (project NEO-MAPP). P.M. acknowledges funding support from the French space agency CNES. F.F. acknowledges funding from the Swiss National Science Foundation (SNSF) Ambizione grant No. 193346. S.R.S. acknowledges support from the DART Participating Scientist Program, grant no. 80NSSC22K0318. A.R. and S.I. acknowledge financial support from the Agenzia Spaziale Italiana (ASI; contract No. 2019-31-HH.0 CUP F84I190012600). A.C.B. acknowledges funding support from the European Union's Horizon 2020 research and innovation program under grant agreement No. 870377 (project NEO-MAPP) and the Spanish MICINN RTI2018-099464-B-I00. |
URI: | http://hdl.handle.net/10045/126702 |
ISSN: | 2632-3338 |
DOI: | 10.3847/PSJ/ac7fa1 |
Idioma: | eng |
Tipo: | info:eu-repo/semantics/article |
Derechos: | © 2022. The Author(s). Published by the American Astronomical Society. Original content from this work may be used under the terms of the Creative Commons Attribution 4.0 licence. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI. |
Revisión científica: | si |
Versión del editor: | https://doi.org/10.3847/PSJ/ac7fa1 |
Aparece en las colecciones: | Investigaciones financiadas por la UE INV - Astronomía y Astrofísica - Artículos de Revistas |
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