The Near-Nuclear Coma of Comet Halley in March 1986
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作者:
Karoly Szegö
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机构:KFKI Research Institute for Particles and Nuclear Physics,
Karoly Szegö
Jean-François Crifo
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机构:KFKI Research Institute for Particles and Nuclear Physics,
Jean-François Crifo
Alexander V. Rodionov
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机构:KFKI Research Institute for Particles and Nuclear Physics,
Alexander V. Rodionov
Marco Fulle
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机构:KFKI Research Institute for Particles and Nuclear Physics,
Marco Fulle
机构:
[1] KFKI Research Institute for Particles and Nuclear Physics,
[2] Service d'Aéronomie du CNRS,undefined
[3] Central Research Institute on Machine Building (TsNIIMASCH),undefined
[4] Osservatorio Astronomico di Trieste,undefined
来源:
Earth, Moon, and Planets
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2002年
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90卷
关键词:
3-D gas dynamics;
dust jets;
P/Halley;
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摘要:
The cameras carried onboard the flyby missions to comet P/Halleyin 1986 imaged the near nuclear jet activity fromseveral spatial directions. The observed, very structured near nucleardust jets were considered at that timeas the result of dust emission from well localized active surface regions(without supporting 3-D model computations, however).Based on the first, recently developed 3-D gas dynamical model ofP/Halley's activity,we have been shown that jet features can be reproduced assuming ahomogeneous dusty icenucleus surface. The dust in the collisional near nuclear comais concentrated along the gas flow discontinuities resulting from thecomplicated surface orography, creating the visual impression ofdust jets. We present here the results of these calculations forthe near nucleus dust distributions,and we compare them with the direct observations made during thethree Halley flybys (Vega 1, Vega 2, and Giotto).
Tao Jun Qian Bochen Gu Mingfeng Tang Yuan Song Baojun Shanghai Astronomical ObservatoryThe Chinese Academy of Sciences Shanghai China Email taojuncenter shao ac cn
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Tao Jun Qian Bochen Gu Mingfeng Tang Yuan Song Baojun Shanghai Astronomical ObservatoryThe Chinese Academy of Sciences Shanghai China Email taojuncenter shao ac cn