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Stellar magnetic activity – Star-Planet Interactions
EPJ Web of Conferences, 2015 Stellar magnetic activity is an important factor in the formation and evolution of exoplanets. Magnetic phenomena like stellar flares, coronal mass ejections, and high-energy emission affect the exoplanetary atmosphere and its mass loss over time.
Poppenhaeger, K.
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Magnetic field, differential rotation and activity of the hot-Jupiter hosting star HD 179949 [PDF]
Astronomy & Astrophysics, 2012 HD 179949 is an F8V star, orbited by a giant planet at ~8 R* every 3.092514 days. The system was reported to undergo episodes of stellar activity enhancement modulated by the orbital period, interpreted as caused by Star-Planet Interactions (SPIs).
A. C. Cameron +46 more
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Planet-star interactions with precise transit timing
Astronomy & Astrophysics, 2022 Context. Hot Jupiters on extremely short-period orbits are expected to be unstable due to tidal dissipation and spiral toward their host stars. That is because they transfer the angular momentum of the orbital motion through tidal dissipation into the stellar interior. Although the magnitude of this phenomenon is related to the physical properties of a
G. Maciejewski +16 more
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The birth environment of planetary systems [PDF]
Royal Society Open Science, 2020 Star and planet formation are inextricably linked. In the earliest phases of the collapse of a protostar, a disc forms around the young star and such discs are observed for the first several million years of a star’s life.
Richard J. Parker
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ROME. III. The Arecibo Search for Star–Planet Interactions at 5 GHz
The Astrophysical Journal, 2023 After nearly three decades of discovery, many exoplanetary systems have been studied and characterized in detail with one important exception: exoplanet magnetism.
Matthew Route, Alexander Wolszczan
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GJ 357 d: Potentially Habitable World or Agent of Chaos?
The Astronomical Journal, 2023 Multiplanet systems provide important laboratories for exploring dynamical interactions within the range of known exoplanetary system architectures. One such system is GJ 357, consisting of a low-mass host star and three orbiting planets, the outermost ...
Stephen R. Kane, Tara Fetherolf
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Interactions of exoplanets with their environment
Comptes Rendus. Physique, 2023 Exoplanets on close-in orbit are subject to intense interactions with their host star. They receive a strong irradiation from the star, trigger tides within their host, and stars and close-in planets can be magnetically connected.
Strugarek, Antoine
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Acta Astronomica, 2020 From its discovery, the WASP-18 system with its massive transiting planet on a tight orbit was identified as a unique laboratory for studies on tidal planet-star interactions. In an analysis of Doppler data, which include five new measurements obtained with the HIRES/Keck-I instrument between 2012 and 2018, we show that the radial velocity signal of ...
Maciejewski, G. +6 more
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Star-planet interactions: I. Stellar rotation and planetary orbits [PDF]
, 2016 Context. As a star evolves, the planet orbits change with time due to tidal interactions, stellar mass losses, friction and gravitational drag forces, mass accretion and evaporation on/by the planet.
Bianda, Michele +5 more
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Magnetic games between a planet and its host star: the key role of topology [PDF]
, 2015 Magnetic interactions between a star and a close-in planet are postulated to be a source of enhanced emissions and to play a role in the secular evolution of the orbital system. Close-in planets generally orbit in the sub-alfv\'enic region of the stellar
Brun, A. S. +3 more
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