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Researchers find new minor planets beyond Neptune（图）
Researchers new minor planets beyond Neptune
2020/3/27
Using data from the Dark Energy Survey, National Science Foundation-funded researchers at the University of Pennsylvania have found more than 300 objects beyond Neptune, minor planets located in the f...
Planetoid Pairs Reveal a Kinder,Gentler Neptune
Planetoid Pairs Reveal Kinder Gentler Neptune
2017/4/27
"It’s a kinder, gentler Neptune," says Gemini astronomer Meg Schwamb in describing a new result that leaves little doubt about how Neptune gently swept a class of planetoid pairs into the outer Solar ...
Kepler and Ground-based Transits of the Exo-Neptune HAT-P-11b
Kepler Ground-based Transits Exo-Neptune HAT-P-11b
2011/10/9
We analyze 26 archival Kepler transits of the exo-Neptune HAT-P-11b, supplemented by ground-based transits observed in the blue (B-band) and near-IR (J-band). Both the planet and host star are smaller...
Considerations on the accretion of Uranus and Neptune by mutual collisions of planetary embryos in the vicinity of Jupiter and Saturn
planetary systems – planets and satellites: formation – planets and satellites: individual: Uranus, Neptune – protoplanetary disks
2011/10/8
Modeling the formation of Uranus and Neptune is a long-lasting problem in planetary science. Due to the gas-drag, collisional damping, and resonant shepherding, the planetary embryos repel the planete...
Odyssey 2 : A mission toward Neptune and Triton to test General Relativity
Odyssey mission Neptune Triton General Relativity
2011/10/18
Odyssey 2 will be proposed in December 2010 for the next call of M3 missions for Cosmic Vision 2015-2025. This mission, under a Phase 0 study performed by CNES, will aim at Neptune and Triton. Two set...
'Empirical' models (pressure vs. density) of Uranus and Neptune interiors constrained by the gravitational coefficients J_2, J_4, the planetary radii and masses, and Voyager solid-body rotation period...
The NASA-UC Eta-Earth Program: III. A Super-Earth orbiting HD 97658 and a Neptune-mass planet orbiting Gl 785
planetary systems stars individual techniques radial velocity
2010/11/9
We report the discovery of planets orbiting two bright, nearby early K dwarf stars, HD97658 and
Gl 785. These planets were detected by Keplerian modelling of radial velocities measured with Keck-HIRE...
Origin and Dynamical Evolution of Neptune Trojans - II: Long Term Evolution
Kuiper Belt celestial mechanics minor planets asteroids – Solar system
2010/11/10
Following our earlier work studying the formation of the Neptunian Trojan population during the
planet’s migration, we present results examining the eventual fate of the Trojan clouds produced in tha...
Transmission Spectra of Transiting Planet Atmospheres: Model Validation and Simulations of the Hot Neptune GJ 436b for JWST
Earth and Planetary Astrophysics (astro-ph.EP)
2010/12/29
We explore the transmission spectrum of the Neptune-class exoplanet GJ 436b, including the possibility that its atmospheric opacity is dominated by a variety of non- equilibrium chemical products. We ...
HAT-P-26b: A Low-Density Neptune-Mass Planet Transiting a K Star
Earth and Planetary Astrophysics (astro-ph.EP)
2010/12/24
We report the discovery of HAT-P-26b, a transiting extrasolar planet orbiting the moderately bright V=11.744 K1 dwarf star GSC 0320-01027, with a period P = 4.234516 +- 0.000015 d, transit epoch Tc = ...
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...