Collision of comet Shoemaker–Levi 9 with Jupiter: what shall we see?

Klumov, B. A.; Kondaurov, V. I.; Konyukhov, A. V.; Medvedev, Yu. D.; Sokolskii, A. G.; Utyuzhnikov, Sergey; Фортов, В. Е.

doi:10.1070/pu1994v037n06abeh000027

Cited by 21 publications

(7 citation statements)

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“…It is to be noted that this solution is quite close to the solution by Hills and Goda [32] obtained by another way [24]. The model described above was earlier used for the modelling of the Shoemaker -Levy Comet impact with Jupiter in reference [33].…”

Section: Tunguska Meteorite Impact Problemsupporting

confidence: 82%

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An adaptive moving mesh method with application to non-stationary hypersonic flows in the atmosphere

Utyuzhnikov¹,

Rudenko

2008

Proceedings of the Institution of Mechanical Engineers, Part G:

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A numerical algorithm based on a shock-capturing scheme on adaptive moving meshes is described. Three-dimensional dynamical adaptive meshes are generated as the result of solving a variational problem. The governing equations are solved in a moving coordinate system therefore the method does not require any interpolation of the solution from one mesh onto another one. The developed algorithm can efficiently be used for the simulation of non-stationary supersonic flows in the atmosphere. As an example, it is applied to the study of the Tunguska meteorite hypersonic impact. For the first time this problem is modelled from the entrance moment up to the interaction with the Earth atmosphere in a three-dimensional formulation. A reasonable correspondence with the data of the observations is obtained. The implementation of the developed numerical algorithm reduces the computational time by the factor of four.

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Section: Tunguska Meteorite Impact Problemsupporting

confidence: 82%

“…The meteorite matter forms a torus-like shape. It is worth noting that this phenomenon was earlier observed for the Shoemaker -Levy comet problem [33]. Further, the penetration channel of 30 m is filled by a low-density gas and the meteorite matter is fragmented.…”

Section: Results Of Numerical Simulationsupporting

confidence: 51%

An adaptive moving mesh method with application to non-stationary hypersonic flows in the atmosphere

Utyuzhnikov¹,

Rudenko

2008

Proceedings of the Institution of Mechanical Engineers, Part G:

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“…[3]) demonstrated that comets have low tensile strength ($ 10 3 dyn cm À2 ), at least on scales on the order of 1 km; this is an indication of the low density and high porosity of the cometary nucleus [4], thus supporting the popular model of the cometary nucleus as a conglomeration of rocky bodies bound together by ice (the rubble pile model) [5]. Observations of the Halle ± Bopp and Hyakutake comets in the mid-1990s provided important information on the chemical and isotopic composition of the gas and dust components of the coma and, hence, on the composition of volatile compounds in the cometary nucleus.…”

Section: Study Of Cometsmentioning

confidence: 99%

“…Furthermore, the gravitational field of the relatively small nucleus can be neglected, that is, we assume that practically the entire material evaporated and destroyed by the collision is ejected from the comet. 3 The shape and size of the crater depend essentially on the initial density of the cometary material. Experiments show that an impact with a low-density nucleus will produce not a crater that can be described by relatively simple similarity laws, but a cavity, often of complex shape, that does not yield to description by simple scaling [13,14].…”

Section: Deep Impact: Active Experiments In Spacementioning

confidence: 99%

Deep Impact experiment: possible observable effects

et al. 2005

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A hypervelocity collision of a metal impactor and the nucleus of the Tempel 1 comet is to be carried out in July 2005 in the framework of the Deep Impact active experiment in space. This paper discusses certain observable consequences of this impact. Numerical simulation of the impact process made it possible to evaluate the diameter of the impact-produced crater as a function of the initial density and porosity of the cometary nucleus. A substantial part of the shockwave-compressed cometary material that is evaporated at the unloading stage may become heated to temperatures on the order of 1À2 Â 10 4 K. A change in the chemical composition of the hot vapor in the process of its expansion was computed using a model elemental composition of the cometary nucleus; this may prove useful for determining the parameters of the flash induced by the impact in the visible optical, UV, IR, and radio wavelength bands.Physics ± Uspekhi 48 (7) 733 ± 742 (2005) # 2005 Uspekhi Fizicheskikh Nauk, Russian Academy of Sciences B A Klumov, V V Kim, I V Lomonosov, V G Sultanov, A V Shutov, V E Fortov Physics ± Uspekhi 48 (7)

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“…More than one and a half thousand photographs of the comet from different distances (8-14,000) Â 10 3 km were obtained, the reflectivity of the surface of the cometary nucleus was determined, the chemical composition of nearly 2000 particles of cometary origin was analyzed using a mass spectrometer, and the amount of material ejected from the nucleus was evaluated as 5-10 t/s. The destruction of the Shoemaker-Levy 9 comet by tidal forces not long before a comet collided with Jupiter in 1994 [3,13] demonstrated that comets have low tensile strength (10 2 Pa), at least on scales of the order of 1 km; this is an indication of the low density and high porosity of the cometary nucleus [4], thus supporting the popular model of the cometary nucleus as a conglomeration of rocky bodies bound together by ice (the rubble pile model) [5]. Observations of the Halle-Bopp and Hyakutake comets in the mid-1990s provided important information on the chemical and isotopic composition of the gas and dust components of the coma and, hence, on the composition of volatile compounds in the cometary nucleus.…”

Section: Introductionmentioning

confidence: 99%