Results 21 to 30 of about 2,904 (146)
Superflares and Giant Planets [PDF]
American Scientist, 2001 Stellar flares 100-10^7 times more energetic than the most powerful solar flares have been detected from 9 normal F and G main sequence stars (Schaefer, King & Deliyannis 2000). Although these stars are not in close binary systems, their superflares show a remarkable similarity to the large stellar flares observed on RS Canum Venaticorum binary ...
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The Fuzziness of Giant Planets’ Cores [PDF]
The Astrophysical Journal Letters, 2017 Abstract Giant planets are thought to have cores in their deep interiors, and the division into a heavy-element core and hydrogen–helium envelope is applied in both formation and structure models. We show that the primordial internal structure depends on the planetary growth rate, in particular, the ratio of heavy elements accretion to ...
Ravit Helled +2 more
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EPJ Web of Conferences, 2011 It has been shown that an Earth-size planet or a super-Earth, in resonance with a transiting Jupiter-like body around an M star, can create detectable TTV signals (Kirste & Haghighipour, 2011).
Rastegar S., Haghighipour N.
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Proceedings of the International Astronomical Union, 2006 AbstractPossibilities and difficulties of applying the theory of magnetic field generation by convection flows in rotating spherical fluid shells to the Giant Planets are outlined. Recent progress in the understanding of the distribution of electrical conductivity in the Giant Planets suggests that the dynamo process occurs predominantly in regions of ...
Busse, F.H., Simitev, R.
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Exoplanets around Red Giants: Distribution and Habitability
Galaxies, 2023 As the search for exoplanets continues, more are being discovered orbiting Red Giant stars. We use current data from the NASA Exoplanet Archive to investigate planet distribution around Red Giant stars and their presence in the host’s habitable zone.
Ruixuan E. Chen +4 more
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On the Radii of Close-in Giant Planets [PDF]
The Astrophysical Journal, 2000 The recent discovery that the close-in extrasolar giant planet, HD209458b, transits its star has provided a first-of-its-kind measurement of the planet's radius and mass. In addition, there is a provocative detection of the light reflected off of the giant planet, $ $ Boo b.
William B. Hubbard +6 more
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Building giant-planet cores at a planet trap [PDF]
Astronomy & Astrophysics, 2007 in press in Astronomy and ...
Morbidelli, A. +3 more
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The Planetary Science Journal, 2023 The tumultuous early era of outer solar system evolution culminated when Neptune migrated across the primordial Kuiper Belt (PKB) and triggered a dynamical instability among the giant planets.
William F. Bottke +8 more
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Rings Beyond the Giant Planets [PDF]
, 2018 Until 2013, only the giant planets were known to host ring systems. In June 2013, a stellar occulation revealed the presence of narrow and dense rings around Chariklo, a small Centaur object that orbits between Saturn and Uranus. Meanwhile, the Cassini spacecraft revealed evidence for the possible past presence of rings around the Saturnian satellites ...
Sicardy, Bruno +5 more
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Formation of ammonia–helium compounds at high pressure
Nature Communications, 2020 Helium is generally considered too inert to be present in giant ice planet mantles. The authors, by first-principles calculations and crystal structure searches, find stable ammonia–helium compounds at the conditions of Uranus and Neptune’s upper mantles,
Jingming Shi +5 more
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