Results 201 to 210 of about 549,270 (251)
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Monthly notices of the Royal Astronomical Society, 2022
The effect of radical accumulation in ice under high energy particle irradiation at low temperature followed by the energy release during heating has been proposed as a possible cause of cometary outbursts.
A. Pavlov +3 more
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The effect of radical accumulation in ice under high energy particle irradiation at low temperature followed by the energy release during heating has been proposed as a possible cause of cometary outbursts.
A. Pavlov +3 more
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Comet nuclei and Trojan asteroids: A new link and a possible mechanism for comet splittings
Icarus, 1990W. Hartmann, D. Tholen
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Research Notes of the AAS, 2020
Abstract Centaurs are an interesting class of small bodies orbiting between Jupiter and Neptune. Several show some sort of activity and are classified as comets, in addition to minor planets. However, is activity a sufficient criterion for comet classification? The ancient definition of a comet as a small body orbiting the Sun that shows
Daniel C. Boice, Panida Boonmasai
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Abstract Centaurs are an interesting class of small bodies orbiting between Jupiter and Neptune. Several show some sort of activity and are classified as comets, in addition to minor planets. However, is activity a sufficient criterion for comet classification? The ancient definition of a comet as a small body orbiting the Sun that shows
Daniel C. Boice, Panida Boonmasai
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Sublimation Mechanisms of Comet Nuclei
Earth, Moon, and Planets, 2000In this paper the sublimation mechanisms of parent molecules from nuclei will be reviewed from the point of view of theoretical models, and the results of models will be compared with the results of the extensive observation campaign of C/1995 O1 Hale–Bopp. The simple model of a mixture of ices in which each gas sublimates independently from the others
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Solar System Research, 2009
Results of space missions to in-situ study comets and the derived current challenges to better understand the properties of comet nuclei are discussed and summarized shortly, particularly in view of the origin of comets in the protoplanetary disk. The main conclusion is that we are far away from a complete understanding of comets.
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Results of space missions to in-situ study comets and the derived current challenges to better understand the properties of comet nuclei are discussed and summarized shortly, particularly in view of the origin of comets in the protoplanetary disk. The main conclusion is that we are far away from a complete understanding of comets.
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Thermal evolution of comet nuclei
Advances in Space Research, 1999Abstract The properties of cometary surfaces which influence the thermal behavior of the nucleus such as the albedo, the emissivity and the surface temperature are critically reviewed. It is shown that these properties are less firmly established than generally believed. A brief presentation is given of the state of the art in comet modelling.
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Rotational Behaviour of Comet Nuclei
1991Numerical experiments of the rotational behaviour of comet nuclei have been performed, including the Sun and Jupiter’s disturbing torques in the models. In a stable configuration, the solar torque induces great librations that remain unchanged along the orbit.
P. Oberti, E. Bois, C. Froeschlé
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Observational Constraints on Surface Characteristics of Comet Nuclei
Earth, Moon, and Planets, 2000Direct observations of the nuclear surfaces of comets have been difficult; however a growing number of studies are overcoming observational challenges and yielding new information on cometary surfaces. In this review, we focus on recent determinations of the albedos, reflectances, and thermal inertias of comet nuclei. There is not much diversity in the
Humberto Campins, Yanga Fernández
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Computational study of radiation chemical processing in comet nuclei
Origins of life and evolution of the biosphere, 1991Cometary nuclei have been exposed to high levels of ionizing radiation since their formation. We present here some results of a computer model calculation of the effect of ionizing radiation on cometary material. The external (cosmic rays) and internal (embedded radionuclides) contributions in the processing of cometary nuclei are considered.
R, Navarro-González +2 more
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