搜索结果: 1-13 共查到“天体物理学 Planets”相关记录13条 . 查询时间(0.317 秒)
Rotating Stars and Revolving Planets: Bayesian Exploration of the Pulsating Sky
Time series Poisson point processes Harmonic analysis Periodograms Experimental design Astronomy Pulsars Extrasolar planets
2011/10/20
I describe ongoing work on development of Bayesian methods for exploring periodically varying phenomena in astronomy, addressing two classes of sources: pulsars, and extrasolar planets (exoplanets). F...
Scaling laws for convection and jet speeds in the giant planets
Scaling laws for convection jet speeds giant planets
2010/11/11
Three dimensional studies of convection in deep spherical shells have been used to test the hypothesis that the strong jet streams on Jupiter, Saturn, Uranus, and Neptune result from convection throug...
Effects of Turbulence, Eccentricity Damping, and Migration Rate on the Capture of Planets into Mean Motion Resonance
planetary systems planetary systems formation — planets and satellites formation — turbulence
2010/11/11
Pairs of migrating extrasolar planets often lock into mean motion resonance as they drift inward. This paper studies the convergent migration of giant planets (driven by a circumstellar disk) and dete...
Formation of Early Water Oceans on Rocky Planets
ocean magma ocean water planet atmosphere
2010/11/15
Terrestrial planets, with silicate mantles and metallic cores, are likely to obtain water and
carbon compounds during accretion. Here I examine the conditions that allow early formation of a surface ...
The HARPS search for southern extrasolar planets XXV. Results from the metal-poor sample
planets and satellites formation – Stars abundances – planetary systems – Techniques spectroscopic – Techniques
2010/11/12
Searching for extrasolar planets around stars of different metallicity may provide strong constraints to the models of planet formation and evolution. In this paper we present the overall results of a...
Ionisation in atmospheres of Brown Dwarfs and extrasolar planets I The role of electron avalanche
Brown Dwarfs extrasolar planets
2011/1/10
Brown Dwarf and extrasolar planet atmospheres form clouds which strongly influence the local chemistry and physics. These clouds are globally neutral obeying dust-gas charge equilibrium which is, on s...
Two planets orbiting the recently formed post-common envelope binary NN Serpentis
Solar and Stellar Astrophysics (astro-ph.SR) Earth and Planetary Astrophysics (astro-ph.EP)
2011/1/7
Planets orbiting post-common envelope binaries provide fundamental information on planet formation and evolution. We searched for such planets in NN Ser ab, an eclipsing short-period binary that shows...
Free-floating planets: a viable option for panspermia
Earth and Planetary Astrophysics (astro-ph.EP)
2011/1/4
Genomic complexity can be used as a clock with which the moment in which life originated can be measured.
Possible Signatures of Magnetospheric Accretion onto Young Giant Planets
Solar and Stellar Astrophysics (astro-ph.SR)
2010/12/29
Magnetospheric accretion is an important process for a wide range of astrophysical systems, and may play a role in the formation of gas giant planets. Extending the formalism describing stellar magnet...
Rotation of the Solar System planets and the origin of the Moon in the context of the tidal downsizing hypothesis
Earth and Planetary Astrophysics (astro-ph.EP)
2010/12/27
It has been proposed recently that the first step in the formation of both rocky and gas giant planets is dust sedimentation into a solid core inside a gas clump (giant planet embryo). The clumps are ...
The HARPS search for southern extra-solar planets. XXIV. Companions to HD 85390, HD 90156 and HD 103197: A Neptune analogue and two intermediate mass planets
Earth and Planetary Astrophysics (astro-ph.EP)
2010/12/24
We report the detection of three new extrasolar planets orbiting the solar type stars HD 85390, HD 90156 and HD 103197 with the HARPS spectrograph mounted on the ESO 3.6-m telescope at La Silla observ...
Constraining the Relative Inclinations of the Planets B and C of the Millisecond Pulsar PSR B1257+12
Planetary systems—pulsars general individual (PSR B1257+12)—extrasolar planets
2010/9/15
We investigate on the relative inclination of the planets B and C orbiting the pulsar PSR B1257+12. First, we show that the third Kepler’s law does represent an adequate model for the orbital periods ...
Turbulence profiles from the scintillation of stars, planets, and moon
Turbulence profiles moon planets
2009/6/30
Turbulence profiles from the scintillation of stars, planets, and moon。