Results 1 to 10 of about 32,484 (256)
The evolution of planetary nebulae [PDF]
Astronomy & Astrophysics, 2005 We investigate and discuss the expansion properties of planetary nebulae by means of 1D radiation-hydrodynamics models computed for different initial envelope configurations and central star evolutionary tracks. In particular, we study how the expansion depends on the initial density gradient of the circumstellar envelope and show that it is possible ...
D. Schönberner +5 more
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The evolution of planetary nebulae [PDF]
Astronomy & Astrophysics, 2007 19 pages, 20 figures, A&A, in ...
Schoenberner, D. +3 more
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The evolution of planetary nebulae [PDF]
Astronomy & Astrophysics, 2004 We follow hydrodynamically the evolution of spherical model planetary nebulae subject to different initial conditions and with various central stars, investigating how combinations of central-star mass and asymptotic giant branch mass-loss rate determine the shape and kinematics of a planetary nebula.
M. Perinotto +3 more
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Tides and the Evolution of Planetary Habitability [PDF]
Astrobiology, 2008 31 pages, 10 figures, accepted to Astrobiology. A version with full resolution figures is available at http://www.lpl.arizona.edu/~rory/publications/brjg07 ...
Barnes, Rory +3 more
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Evolution of planetary systems in resonance [PDF]
Astronomy & Astrophysics, 2004 We study the time evolution of two protoplanets still embedded in a protoplanetary disk. The results of two different numerical approaches are presented and compared. In the first approach, the motion of the disk material is computed with viscous hydrodynamical simulations, and the planetary motion is determined by N-body calculations including exactly
Kley, Wilhelm +2 more
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Dynamical Evolution of Planetary Systems [PDF]
, 2013 to be published in "Planets, Stars and Stellar Systems", P. Kalas and L. French (eds.)
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The evolution of planetary nebulae [PDF]
Astronomy & Astrophysics, 2010 By means of hydrodynamical models we do the first investigations of how the properties of planetary nebulae are affected by their metal content and what can be learned from spatially unresolved spectrograms of planetary nebulae in distant stellar systems.
Schönberner, D. +3 more
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Water, Life, and Planetary Geodynamical Evolution [PDF]
Space Science Reviews, 2007 In our search for life on other planets over the past decades, we have come to understand that the solid terrestrial planets provide much more than merely a substrate on which life may develop. Large-scale exchange of heat and volatile species between planetary interiors and hydrospheres/atmospheres, as well as the presence of a magnetic field, are ...
van Thienen, P. +6 more
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Evolution of planetary nebulae [PDF]
Astronomy & Astrophysics, 2001 We present a new synthetic model to follow the evolution of a planetary nebula (PN) and its central star, starting from the onset of AGB phase up to the white dwarf cooling sequence. The model suitably combines various analytical prescriptions to account for different (but inter-related) aspects of planetary nebulae, such as: the dynamical evolution of
MARIGO, PAOLA +3 more
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Planetary Laws and Evolution [PDF]
Surveyor, 1910 Abstract AS an introductory paper, which it is hoped will induce other members to contribute their views, the present address is intended to present briefly some of the general and striking features, of planetary Science.
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