Zobrazeno 1 - 10 of 1 033 pro vyhledávání: '"Koppen J"'
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Akademický článek
P.J. van Koppen, J. ten Kate, De Hoge Raad in persoon. Benoemingen in de Hoge Raad der Nederlanden 1838-2002
Autor: B.S. Hempenius-van Dijk
Publikováno v: BMGN: Low Countries Historical Review, Vol 120, Iss 1, Pp 136-138 (2005)
Externí odkaz: https://doaj.org/article/b2d6481dc8c84dd1999a546cbdae15ca
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3
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Ram Pressure Stripping Made Easy: An Analytical Approach
Autor: Koppen, J., Jachym, P., Taylor, R., Palous, J.
The removal of gas by ram pressure stripping of galaxies is treated by a purely kinematic description. The solution has two asymptotic limits: if the duration of the ram pressure pulse exceeds the period of vertical oscillations perpendicular to the
Externí odkaz: http://arxiv.org/abs/1806.05887
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6
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Ram pressure stripping of tilted galaxies
Autor: Jachym, P., Koppen, J., Palous, J., Combes, F.
Ram pressure stripping of galaxies in clusters can yield gas deficient disks. Previous numerical simulations based on various approaches suggested that, except for near edge-on disk orientations, the amount of stripping depends very little on the inc
Externí odkaz: http://arxiv.org/abs/0904.3886
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7
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Gas stripping in galaxy clusters: a new SPH simulation approach
Autor: Jachym, P., Palous, J., Koppen, J., Combes, F.
The influence of a time-varying ram pressure on spiral galaxies in clusters is explored with a new simulation method based on the N-body SPH/tree code GADGET. We have adapted the code to describe the interaction of two different gas phases, the diffu
Externí odkaz: http://arxiv.org/abs/0706.3631
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8
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Chemical compositions and plasma parameters of planetary nebulae with Wolf-Rayet and wels type central stars
Autor: Girard, P., Koppen, J., Acker, A.
Aims: Chemical compositions and other properties of planetary nebulae around central stars of spectral types [WC], [WO], and wels are compared with those of `normal' central stars, in order to clarify the evolutionary status of each type and their in
Externí odkaz: http://arxiv.org/abs/astro-ph/0611149
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10
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The Galactic Bulge: The Stellar and Planetary Nebulae Populations
Autor: Cuisinier, F., Koppen, J., Acker, A., Maciel, W. J.
We compare abundances patterns in the Bulge for elements observed in stars and in planetary nebulae. Some alpha elements, like Mg and Ti, are overabundant respect to Fe, and others are not, like He, O, Si, S, Ar, Ca. The first ones favor a quick evol
Externí odkaz: http://arxiv.org/abs/astro-ph/0101215
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