Results 31 to 40 of about 312,448 (341)

Ionization in atmospheres of brown dwarfs and extrasolar planets. IV. The effect of cosmic rays [PDF]

open access: yes, 2013
Cosmic rays provide an important source for free electrons in Earth's atmosphere and also in dense interstellar regions where they produce a prevailing background ionization. We utilize a Monte Carlo cosmic ray transport model for particle energies of 10(
Helling, Christiane, Rimmer, Paul
core   +2 more sources

Superchemistry: dynamics of coupled atomic and molecular Bose-Einstein condensates [PDF]

open access: yes, 2000
We analyze the dynamics of a dilute, trapped Bose-condensed atomic gas coupled to a diatomic molecular Bose gas by coherent Raman transitions. This system is shown to result in a new type of `superchemistry', in which giant collective oscillations ...
A. A. Abrikosov   +35 more
core   +2 more sources

Revealing giant planet interiors beneath the cloudy veil

open access: yesNature Communications, 2020
Observations from the Juno and Cassini missions provide essential constraints on the internal structures and compositions of Jupiter and Saturn, resulting in profound revisions of our understanding of the interior and atmospheres of Gas Giant planets ...
Tristan Guillot, Leigh N. Fletcher
doaj   +1 more source

Rapid Formation of Gas-giant Planets via Collisional Coagulation from Dust Grains to Planetary Cores. II. Dependence on Pebble Bulk Density and Disk Temperature

open access: yesThe Astrophysical Journal, 2023
Thanks to “dust-to-planet” simulations (DTPSs), which treat the collisional evolution directly from dust to giant-planet cores in a protoplanetary disk, we showed that giant-planet cores are formed in ≲10 au in several 10 ^5 yr, because porous pebbles ...
Hiroshi Kobayashi, Hidekazu Tanaka
doaj   +1 more source

New Catastrophic Gas Blowout and Giant Crater on the Yamal Peninsula in 2020: Results of the Expedition and Data Processing

open access: yesGeosciences, 2021
This article describes the results of an Arctic expedition studying the new giant gas blowout crater in the north of Western Siberia, in the central part of the Yamal Peninsula in 2020.
Vasily Bogoyavlensky   +6 more
doaj   +1 more source

Oligarchic and giant impact growth of terrestrial planets in the presence of gas giant planet migration

open access: yes, 2005
We present the results of N--body simulations which examine the effect that gas giant planet migration has on the formation of terrestrial planets. The models incorporate a 0.5 Jupiter mass planet undergoing type II migration through an inner protoplanet-
Adachi   +47 more
core   +1 more source

Radio Observations of the AGN and Gas in Low Surface Brightness Galaxies [PDF]

open access: yes, 2006
LSB galaxies have low metallicities, diffuse stellar disks, and massive HI disks. We have detected molecular gas in two giant LSB galaxies, UGC 6614 and F568-6. A millimeter continuum source has been detected in UGC 6614 as well.
F. Combes   +5 more
core   +4 more sources

Formation and distribution characteristics of Proterozoic–Lower Paleozoic marine giant oil and gas fields worldwide

open access: yesPetroleum Science, 2017
There are rich oil and gas resources in marine carbonate strata worldwide. Although most of the oil and gas reserves discovered so far are mainly distributed in Mesozoic, Cenozoic, and upper Paleozoic strata, oil and gas exploration in the Proterozoic ...
Xiao-Ping Liu   +7 more
doaj   +1 more source

Formation of Giant Planets by Concurrent Accretion of Solids and Gas inside an Anti-Cyclonic Vortex

open access: yes, 2005
We study the formation of a giant gas planet by the core--accretion gas--capture process, with numerical simulations, under the assumption that the planetary core forms in the center of an anti-cyclonic vortex.
Barge P.   +7 more
core   +1 more source

Estimation of the scales of retrograde condensation in a giant gas-condensate deposit

open access: yesНаука. Инновации. Технологии, 2022
The estimation of scales of retrograde condensations is made at a gas regime of working out for one of almost produced giant gas-condensate deposits of the world.
N. N. Petrenko   +2 more
doaj  

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