Results 191 to 200 of about 296,727 (213)

The Large-Grained Dust Coma of 174P/Echeclus

Publications of the Astronomical Society of the Pacific, 2008
On 2005 December 30, Y.-J. Choi and P. R. Weissman discovered that the formerly dormant Centaur 2000 EC98 was in strong outburst. Previous observations by P. Rousselot et al. spanning a 3-year period indicated a lack of coma down to the 27 mag arcsec 2 level.We present Spitzer Space Telescope MIPS observations of this newly active Centaur--now known as
Bauer, James M., Choi, Young-Jun, Weissman, Paul R., Stansberry, John A., Fernández, Yanga R., Roe, Henry G., Buratti, Bonnie J., Sung, Hyun-Il   +7 more
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Cometary dust coma models. II. Computer experiments

Astronomische Nachrichten, 1986
AbstractComputer simulations of a cometary dust coma are presented which take into account different distribution functions of the ejected material as well as anisotropic ejection due to the rotation of the nucleus and single active regions on its surface.
Gottlöber, S., Liebscher, D.-E., Mücket, J. P., Müller, V.   +3 more
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Cometary dust coma models. I. Analytic calculations

Astronomische Nachrichten, 1986
AbstractThe dust coma of comets is calculated within the fountain model of isotropically ejected particles. A method to estimate the particle size distribution is proposed.
Gottlöber, S., Liebscher, D.-E., Mücket, J. P., Müller, V.   +3 more
openaire   +1 more source

The nature of dust grains in the comae of Comets černis and Bowell

Earth, Moon, and Planets, 1985
The currently available infrared data on scattered light from the dust comae of Cernis and Bowell set stringent upper limits to the contribution of icy grains. For Comet Cernis the data is consistent with only a 10% mass fraction of water-ice included within silicate-organic-carbon grains of scale radius 15 microns, while for Comet Bowell there is no ...
F. Hoyle, N. C. Wickramasinghe, M. K. Wallis   +2 more
openaire   +1 more source

Coma morphology and dust emission pattern of comet Halley

Advances in Space Research, 1985
Abstract This contribution starts with a short overview on cometary dust modelling and then focuses on the application of coma modelling with respect to in-situ measurements of cometary dust and ground based observations. The fountain model, valid for the dynamics of small cometary dust particles, is discussed.
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Dust and Gas in Comae of Four Short-Period Comets

Small Solar System bodies are widely regarded as the primary repositories of primordial matter, preserved since the early stages of planetary system formation. Among these, long-period comets (LPCs) represent a unique class of objects; their dynamical trajectories keep them at vast distances from the Sun for most of their existence, ensuring that their
Olena Shubina, Oleksandra Ivanova, Leonid Shakun   +2 more
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A numerical model of cometary dust coma structures

We would like to thank Peter Thomas and collaborators for providing us the shape model of 9P/Tempel 1. We also wish to thank the observers at the Calar Alto and La Silla observatories who have performed the service mode observations used in our analysis. Without their dedication and care the images would not be available.
Vincent, J.-B., Böhnhardt, H., Lara, Luisa María   +2 more
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Dust Hazard Assessment using the Engineering Dust Coma Model of the Comet Interceptor mission

IntroductionThe Comet Interceptor (CI) mission [1] will pass through a potentially hazardous region of a comet’s inner coma. It is therefore important to assess the dust impact risk to the spacecraft and their scientific instruments to aid hazard mitigation strategies.
Raphael Marschall, Vladimir Zakharov, Cecilia Tubiana, Michael S. P. Kelley, Vincenzo Della Corte   +4 more
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Dust distribution and dynamics in the coma of 67P/Churyumov-Gerasimenko

In this work, the motion of dust particles in the coma of the comet 67P/Churyumov-Gerasimenko is investigated. This is done by analyzing sets of images taken by OSIRIS, the main imaging system on board Rosetta, in which these dust particles can be seen as bright tracks instead of points sources, as result of the combination of motions of both particles
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Mechanical and Electrostatic Experiments With Dust Particles Collected in the Inner Coma of Comet 67P by COSIMA Onboard Rosetta

Philosophical Transactions Series A, Mathematical, Physical, and Engineering Sciences, 2017
Anaïs Bardyn, Hervé Cottin, Cécile Engrand   +2 more
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