Results 51 to 60 of about 10,991 (143)
A Perfect Tidal Storm: HD 104067 Planetary Architecture Creating an Incandescent World
The Astronomical JournalThe discovery of planetary systems beyond the solar system has revealed a diversity of architectures, most of which differ significantly from our system.
Stephen R. Kane +7 more
doaj +1 more source
The mass-period distribution of close-in exoplanets [PDF]
, 2011 The lower limit to the distribution of orbital periods P for the current population of close-in exoplanets shows a distinctive discontinuity located at approximately one Jovian mass. Most smaller planets have orbital periods longer than P~2.5 days, while higher masses are found down to P~1 day.
arxiv +1 more source
Journal of Geophysical Research: Planets, Volume 129, Issue 3, March 2024.Abstract Since December 2015, Ultraviolet Imager (UVI) onboard Akatsuki has been observing Venus clouds at the wavelengths of 283 and 365 nm. Horizontal winds near the cloud top derived from the UVI images over ∼7 earth years are analyzed to elucidate spatial and temporal variability of the superrotation and planetary‐scale waves.
Takeshi Horinouchi +10 more
wiley +1 more source
Empirical Constraints on Tidal Dissipation in Exoplanet Host Stars
The Astrophysical JournalThe orbits of short-period exoplanets are sculpted by tidal dissipation. However, the mechanisms and associated efficiencies of these tidal interactions are poorly constrained.
Sarah C. Millholland +2 more
doaj +1 more source
Quiet Time Thermospheric Gravity Waves Observed by GOCE and CHAMP
Journal of Geophysical Research: Space Physics, Volume 129, Issue 1, January 2024.Abstract The Gravity Field and Steady‐State Ocean Circulation Explorer (GOCE) and CHAllenging Minisatellite Payload (CHAMP) satellites measure in‐situ thermospheric density and cross‐track wind. When propagating obliquely to the satellite track in a horizontal plane (i.e., not purely along‐track or cross‐track), gravity waves (GWs) can be observed both
Shuang Xu, Sharon L. Vadas, Jia Yue
wiley +1 more source
Orbital Decay in Binaries Containing Post-Main Sequence Stars [PDF]
, 2018 The orbital decay of binaries containing a primary sub-giant or red giant star and a stellar or substellar companion is investigated. The tide raised in the primary by the companion leads to an exchange of angular momentum between the orbit and the stellar spin, causing the orbit to contract and the primary to spin up.
arxiv +1 more source
Exoplanets Beyond the Solar Neighbourhood: Galactic Tidal Perturbations [PDF]
, 2012 The majority of Milky Way extrasolar planets likely reside within a few kpc of the Galactic centre. The Galactic tidal forces acting on planets scale inversely with radius in the Galaxy and so are much greater in the inner Galaxy than in the Solar neighbourhood.
arxiv +1 more source
The Astrophysical JournalWe analyze four super-Earth exoplanets, LHS 1140 b, K2-18 b, TOI-1452 b, and TOI-1468 c, which orbit M dwarf stars in the habitable zone. Their relative proximity, within 40 pc, makes them prime candidates for follow-up observations and atmospheric and ...
Mangesh Daspute +5 more
doaj +1 more source
Tidal synchronization of close-in satellites and exoplanets. A rheophysical approach [PDF]
, 2012 This paper presents a new theory of the dynamical tides of celestial bodies. It is founded on a Newtonian creep instead of the classical delaying approach of the standard viscoelastic theories and the results of the theory derive mainly from the solution of a non-homogeneous ordinary differential equation.
arxiv +1 more source
Damping Obliquities of Hot Jupiter Hosts by Resonance Locking
The Astrophysical Journal LettersWhen orbiting hotter stars, hot Jupiters are often highly inclined relative to their host star equator planes. By contrast, hot Jupiters orbiting cooler stars are more aligned.
J. J. Zanazzi +2 more
doaj +1 more source