Zobrazeno 1 - 10
of 58
pro vyhledávání: '"William R. Ward"'
Publikováno v:
Journal of geophysical research. Planets
A high-angular momentum giant impact with the Earth can produce a Moon with a silicate isotopic composition nearly identical to that of Earth’s mantle, consistent with observations of terrestrial and lunar rocks. However, such an event requires sub
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::7eec842a888b72e2e78ab3614006c989
http://europepmc.org/articles/PMC7545365
http://europepmc.org/articles/PMC7545365
Autor:
William R. Ward
Publikováno v:
Journal of Geophysical Research: Planets. 122:342-357
A model of the viscous evolution of a two-phase, vapor/melt protolunar disk is described. Droplets condense from the vapor and "rain-out", forming a stratified structure with a mid-plane magma layer surrounded by a vapor reservoir. The magma layer is
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::4f12dcca49753d76adb02e410c3b8df9
https://doi.org/10.1002/2016je005198
https://doi.org/10.1002/2016je005198
Publikováno v:
Publications of the Astronomical Society of the Pacific. 124:185-194
Nighttime visible-light sky brightness and transparency are reported for the Polar Environment Research Laboratory (PEARL), located on a 610-m high ridge near the Eureka research station, on Ellesmere Island, Canada. Photometry of Polaris obtained in
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::74591609557634ec4a434a3028b45217
https://doi.org/10.1086/664444
https://doi.org/10.1086/664444
Autor:
Robin M. Canup, William R. Ward
Publikováno v:
The Astronomical Journal. 140:1168-1193
The development and evolution of a circumplanetary disk during the accretion of a giant planet is examined. The planet gains mass and angular momentum from infalling solar nebula material while simultaneously contracting due to luminosity losses. Whe
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::d7726e938678cebe6af25e375fdd7cd1
https://doi.org/10.1088/0004-6256/140/5/1168
https://doi.org/10.1088/0004-6256/140/5/1168
Publikováno v:
Icarus. 190:103-109
Tsiganis et al. (2005) have proposed that the current orbital architecture of the outer solar system could have been established if it was initially compact and Jupiter and Saturn crossed the 2:1 orbital resonance by divergent migration. The crossing
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::dc4e4541a13f6f1bdb8f461fd8484d56
https://doi.org/10.1016/j.icarus.2007.03.005
https://doi.org/10.1016/j.icarus.2007.03.005
Autor:
Robin M. Canup, William R. Ward
Publikováno v:
The Astrophysical Journal. 640:L91-L94
The spin-axis precession period of Jupiter is near that of a fundamental Laplace-Lagrange solar system mode describing the precession of Uranus's orbit plane (~4.3 × 105 yr). As a result, a portion of the 31 obliquity of Jupiter may actually be forc
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::67306c9b03e8e62215ae588188c57b3f
https://doi.org/10.1086/503156
https://doi.org/10.1086/503156
Autor:
Douglas P. Hamilton, William R. Ward
Publikováno v:
The Astronomical Journal. 128:2501-2509
The tilt of Saturn's spin axis to its orbit plane is 267, while that of Jupiter is only 31. We offer an explanation for this puzzling difference owing to gravitational perturbations of Saturn by the planet Neptune. A similarity between the precession
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::e03d1d7bcd54e777c279be2ae82f8a32
https://doi.org/10.1086/424533
https://doi.org/10.1086/424533
Autor:
William R. Ward, Hidekazu Tanaka
Publikováno v:
The Astrophysical Journal. 602:388-395
We perform linear calculations to investigate three-dimensional density waves excited by planets on elliptical and inclined orbits in isothermal protoplanetary disks. We consider small planets that have no disk gap around their orbits. Eccentricities
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::d72017e5cc591cf8961673e1698b746e
https://doi.org/10.1086/380992
https://doi.org/10.1086/380992