Results 121 to 130 of about 1,052,175 (256)
Are WASP-107-like Systems Consistent with High-eccentricity Migration?
The Astrophysical JournalWASP-107 b seems to be a poster child of the long-suspected high-eccentricity migration scenario. It is on a 5.7 day, polar orbit. The planet is Jupiter-like in radius but Neptune-like in mass with exceptionally low density.
Hang Yu, Fei Dai
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
The Astrophysical JournalPlanet formation models suggest that the small exoplanets that migrate from beyond the snowline of the protoplanetary disk likely contain water-ice-rich cores (∼50% by mass), also known as water worlds.
Aritra Chakrabarty, Gijs D. Mulders
doaj +1 more source
Towards Chemical Constraints on Hot Jupiter Migration [PDF]
, 2014 The origin of hot Jupiters -- gas giant exoplanets orbiting very close to their host stars -- is a long-standing puzzle. Planet formation theories suggest that such planets are unlikely to have formed in-situ but instead may have formed at large orbital separations beyond the snow line and migrated inward to their present orbits.
arxiv +1 more source
Tests of In-Situ Formation Scenarios for Compact Multiplanet Systems
, 2014 Kepler has identified over 600 multiplanet systems, many of which have several planets with orbital distances smaller than that of Mercury -- quite different from the Solar System. Because these systems may be difficult to explain in the paradigm of core
Schlaufman, Kevin C.
core +1 more source
, 2010 We carry out a series of high-resolution (1024 X 1024) hydrodynamic simulations to investigate the orbital evolution of a Saturn-Jupiter pair embedded in a gaseous disk.
Anglada-Escud +14 more
core +1 more source
The Impact-driven Atmospheric Loss of Super-Earths around Different Spectral Types of Host Stars
The Astrophysical JournalA planet’s mass loss is important for the its formation and evolution. The radius valley (RV) is believed to be triggered by evaporation-induced mass loss.
Wei Zhong +3 more
doaj +1 more source
Characterization of exoplanet hosts
EPJ Web of Conferences, 2013 Spectroscopic analysis of exoplanet hosts and the stellar sample from which they are drawn provides abundances and other properties that quantitively constrain models of planet formation.
Valenti Jeff A.
doaj +1 more source
The K2 Mission: Characterization and Early results
, 2014 The K2 mission will make use of the Kepler spacecraft and its assets to expand upon Kepler's groundbreaking discoveries in the fields of exoplanets and astrophysics through new and exciting observations.
Aigrain, Suzanne +18 more
core +1 more source
Breaking Giant Chains: Early-stage Instabilities in Long-period Giant Planet Systems
The Astrophysical JournalOrbital evolution is a critical process that sculpts planetary systems, particularly during their early stages where planet–disk interactions are expected to lead to the formation of resonant chains.
Vighnesh Nagpal +2 more
doaj +1 more source