The origin of high eccentricity planets: the dispersed planet formation regime for weakly magnetized disks. Geoscience Frontiers. http://dx.doi.org/10.1016/j.gsf.2016.07.001 (In press).The origin of high eccentricity planets:The dispersed planet formation regime for weakly magnetized disks[J]. ...
We report 85 high-precision Doppler radial velocity measurements taken between 1999.5 and 2005.0 of the parent star of the transiting planet HD 209458b. We obtain an orbital fit to the 68 radial velocities taken out of transit and derive planetary parameters e = 0.014 ± 0.009, ). We perform...
An eccentricity of exactly 1 is a parabolic orbit and anything greater than that is a hyperbolic orbit. The orbits of the planets are almost circular with the exception of Mercury (0.206) and Mars to a lesser extent. The Earth has an eccentricity of 0.017. Most asteroids have orbital ...
systems,eccentricityismodulatedbytheplanets’mutualsecularinteractionas aconsequenceofangularmomentumexchangebetweenthem.Formatureplan- ets,theeigenfrequenciesofthismodulationaredeterminedbytheirmassand semi-majoraxisratios.But,priortothediskdepletion,selfgravityoftheplan- ...
A NUMBER of mechanisms for the formation of the Moon have been suggested; fission of the Earth, precipitation in a hot gaseous silicate atmosphere, independent formation in orbit about the Earth, and independent formation elsewhere in the solar system fo
The probability that such planets enter resonance depends on the type of resonance, the migration rate, the eccentricity damping rate, and the amplitude of the turbulent fluctuations. This problem is studied both through direct integrations of the full three-body problem and via semi-analytic model...
Orbits of Planets as ellipses Translate ellipse images Worksheet Version of this Web page (same questions on a worksheet) The eccentricity of an ellipse is a measure of how nearly circular the ellipse. Eccentricity is found by the following formula eccentricity = c/a where c is the distance fr...
Casing eccentricity has been considered as a problem during design and calculations of primary cementing, particularly in inclined and horizontal wellbores. Engineering calculations are usually based on the assumption of concentric annuls, which usually leads to erroneous or at least inaccurate results. ...
The eccentricity of the orbit, among the highest known for extra-solar planets, continues the trend that extra-solar planets with semi-major axes greater than about 0.15 AU tend to have much higher eccentricities than are found in our solar system. The high metallicity of the parent star ...
It will disturb normal process of biological experiments, and in the end, put troubles on cultivation in space or other planets. Therefore, it is necessary to build controlled artificial gravity environment as countermeasures for manned space missions and some biological experiments, especially for ...