نتایج جستجو برای: jupiter
تعداد نتایج: 4937 فیلتر نتایج به سال:
The equation of state of hydrogen, helium, and water effects interior structure models of giant planets significantly. We present a new equation of state data table, LM-REOS, generated by large scale quantum molecular dynamics simulations for hydrogen, helium, and water in the warm dense matter regime, i.e. for megabar pressures and temperatures of several thousand Kelvin, and by advanced chemi...
In this paper we construct two models for the motion of a particle under the gravitational attraction of Sun, Jupiter, Saturn and Uranus, that can be seen as a generalization of the well known Restricted Three-Body Problem (RTBP). Both models are obtained by computing quasi-periodic solutions – with two basic frequencies – of a suitable N-body problem. The first model is based on a quasi-period...
We identify a subsample of the recently detected extrasolar planets that is minimally affected by the selection effects of the Doppler detection method. With a simple analysis we quantify trends in the surface density of this subsample in the period-M sin(i) plane. A modest extrapolation of these trends puts Jupiter in the most densely occupied region of this parameter space, thus indicating th...
Understanding the origin of the orbital resonances of the Galilean satellites of Jupiter will constrain the longevity of the extensive volcanism on Io, may explain a liquid ocean on Europa, and may guide studies of the dissipative properties of stars and Jupiter-like planets. The differential migration of the newly formed Galilean satellites due to interactions with a circumjovian disk can lead...
-This paper summarizes the Voyager 1 and Voyager 2 orbit determination activity extending from encounter minus 60 days to the Jupiter encounter, and includes quantitative results and conclusions derived from mission experience. The major topics covered include an identification and quantification of the major orbit determination error sources and a review of salient orbit determination results ...
Microlensing is the only technique likely, within the next 5 years, to constrain the frequency of Jupiter-analogs. The PLANET collaboration has monitored nearly 100 microlensing events of which more than 20 have sensitivity to the perturbations that would be caused by a Jovian-mass companion to the primary lens. No clear signatures of such planets have been detected. These null results indicate...
We announce the discovery of Kepler-6b, a transiting hot Jupiter orbiting a star with unusually high metallicity, [Fe/H] = +0.34± 0.04. The planet’s mass is about 2/3 that of Jupiter, MP = 0.67MJ, and the radius is 30% larger than that of Jupiter, RP = 1.32RJ, resulting in a density of ρP = 0.35 g cm−3, a fairly typical value for such a planet. The orbital period is P = 3.235 days. The host sta...
A number of papers have been dealing with the problem of estimating the di erential delay of an unknown signal impinging on two sensors Here the case of K sensors and L sources is considered with L K delays to be estimated The solution resorts to blind multichannel MA identi cation in the time domain All delays are estimated independently of each other using a relation between MA coe cients R e...
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