Results 1 to 10 of about 16,556 (260)

Planetary microbiology: microbes, planets, and the search for life [PDF]

open access: yesApplied and Environmental Microbiology
Life on Earth has been shaped by transformative microbial innovations and singularities that redefined planetary systems, from oxygenic photosynthesis to biological nitrogen fixation.
Betül Kaçar
doaj   +2 more sources

Exciting opportunities in planetary structural geology and tectonics: An early career perspective

open access: yesFrontiers in Earth Science, 2022
The outer shells of solid planetary bodies have been all subject to deformation during their history. The nature and style of deformation strictly depends on the evolution of each planetary body.
Kelsey Crane, Valentina Galluzzi
doaj   +1 more source

Post-main-sequence planetary system evolution [PDF]

open access: yesRoyal Society Open Science, 2016
The fates of planetary systems provide unassailable insights into their formation and represent rich cross-disciplinary dynamical laboratories. Mounting observations of post-main-sequence planetary systems necessitate a complementary level of theoretical
Dimitri Veras
doaj   +1 more source

Binary Central Stars of Planetary Nebulae

open access: yesGalaxies, 2020
It is now clear that a vast majority of intermediate-mass stars have stellar and/or sub-stellar companions, therefore it is no longer appropriate to consider planetary nebulae as a single-star phenomenon, although some single, isolated stars may well ...
David Jones
doaj   +1 more source

The evolution of planetary nebulae [PDF]

open access: yesAstronomy & 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
openaire   +2 more sources

Tides and the Evolution of Planetary Habitability [PDF]

open access: yesAstrobiology, 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
openaire   +3 more sources

Lessons from the Ionised and Molecular Mass of Post-CE PNe

open access: yesGalaxies, 2022
Close binary evolution is widely invoked to explain the formation of axisymmetric planetary nebulae after a brief common envelope phase. The evolution of the primary would be interrupted abruptly, its still quite massive envelope being fully ejected to ...
Miguel Santander-García   +4 more
doaj   +1 more source

The evolution of planetary nebulae [PDF]

open access: yesAstronomy & 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
openaire   +3 more sources

Evolution of planetary systems in resonance [PDF]

open access: yesAstronomy & 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
openaire   +2 more sources

Spatial- and temporal-interpolations for efficient hybrid wave numerical simulations

open access: yesFrontiers in Earth Science, 2022
The hybrid simulation method is developed for simulating wave propagation only in a localized heterogeneous media with hybrid inputs obtained once for all from a known reference model.
Hao Shen   +7 more
doaj   +1 more source

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