Issue |
A&A
Volume 628, August 2019
|
|
---|---|---|
Article Number | A109 | |
Number of page(s) | 13 | |
Section | Planets and planetary systems | |
DOI | https://doi.org/10.1051/0004-6361/201834892 | |
Published online | 15 August 2019 |
IMEM2: a meteoroid environment model for the inner solar system
1
Institute of Space Systems, University of Stuttgart,
Pfaffenwaldring 29,
70569
Stuttgart,
Germany
e-mail: srama@irs.uni-stuttgart.de
2
Max Planck Institute for Nuclear Physics (MPIK),
Saupfercheckweg 1,
69117
Heidelberg,
Germany
3
ESTEC,
Noordwijk, The Netherlands
4
ASD/IMCCE, CNRS-UMR8028, Observatoire de Paris, PSL University, Sorbonne Université,
77 Avenue Denfert-Rochereau,
75014
Paris,
France
e-mail: laskar@imcce.fr
5
GéoAzur, CNRS-UMR7329, Observatoire de la Côte d’Azur, Université Nice Sophia Antipolis,
250 Av. A. Einstein,
Valbonne
06560, France
e-mail: fienga@oca.eu
Received:
15
December
2018
Accepted:
2
July
2019
Context. The interplanetary dust complex is currently understood to be largely the result of dust production from Jupiter-family comets, with contributions also from longer-period comets (Halley- and Oort-type) and collisionally produced asteroidal dust.
Aims. Here we develop a dynamical model of the interplanetary dust cloud from these source populations in order to develop a risk and hazard assessment tool for interplanetary meteoroids in the inner solar system.
Methods. The long-duration (1 Myr) integrations of dust grains from Jupiter-family and Halley-type comets and main belt asteroids were used to generate simulated distributions that were compared to COBE infrared data, meteor data, and the diameter distribution of lunar microcraters. This allowed the constraint of various model parameters.
Results. We present here the first attempt at generating a model that can simultaneously describe these sets of observations. Extended collisional lifetimes are found to be necessary for larger (radius ≥ 150 μm) particles. The observations are best fit with a differential size distribution that is steep (slope = 5) for radii ≥ 150 μm, and shallower (slope = 2) for smaller particles. At the Earth the model results in ~ 90–98% Jupiter-family comet meteoroids, and small contributions from asteroidal and Halley-type comet particles. In COBE data we find an approximately 80% contribution from Jupiter-family comet meteoroids and 20% from asteroidal particles. The resulting flux at the Earth is mostly within a factor of about two to three of published measurements.
Key words: meteorites, meteors, meteoroids / zodiacal dust
© ESO 2019
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.