Results 101 to 110 of about 1,322 (222)

Three-dimensional Orbital Architectures and Detectability of Adjacent Companions to Hot Jupiters

open access: yesThe Astrophysical Journal
The orbital properties of the (as yet) small population of hot Jupiters with nearby planetary companions provide valuable constraints on the past migration processes of these systems.
Thomas MacLean, Juliette Becker
doaj   +1 more source

Evidence for a Peak at ∼0.3 in the Eccentricity Distribution of Typical Super-Jovian Exoplanets

open access: yesThe Astrophysical Journal Letters
In this study, we compute completeness-corrected occurrence rates of giant exoplanets as a function of mass, semimajor axis, and eccentricity, using the approximately uniform California Legacy Survey sample of radial velocity-discovered planets published
Sarah Blunt   +5 more
doaj   +1 more source

Free Floating or Merely Detached?

open access: yesThe Astrophysical Journal
Microlensing surveys suggest the presence of a surprisingly large population of free-floating planets, with a rate of about two Neptunes per star.
Sam Hadden, Yanqin Wu
doaj   +1 more source

A Comprehensive Analysis of Spitzer 4.5 μm Phase Curves of Hot Jupiters

open access: yesThe Astronomical Journal
Although exoplanetary science was not initially projected to be a substantial part of the Spitzer mission, its exoplanet observations set the stage for current and future surveys with JWST and Ariel.
Lisa Dang   +21 more
doaj   +1 more source

A Direct Comparison between the Use of Double Gray and Multiwavelength Radiative Transfer in a General Circulation Model with and without Radiatively Active Clouds

open access: yesThe Astrophysical Journal
Inhomogeneous cloud formation and wavelength-dependent phenomena are expected to shape hot Jupiter atmospheres. We present a general circulation model with multiwavelength “picket fence” radiative transfer and radiatively active, temperature-dependent ...
Isaac Malsky   +7 more
doaj   +1 more source

Dynamics of Small Solar System Bodies and Exoplanets [PDF]

open access: yes, 2010
The Gaia space mission to be operated in early 2012 by the European Space Agency (ESA), will make a huge step in our knowledge of the Sun's neighbor-hood, up to the Magellanic clouds. Somewhat closer, Gaia will also provide ma jor improvements in the science of asteroids, and more generally to our Solar System, either directly or indirectly.
openaire   +1 more source

Superdense exposed exoplanet cores [PDF]

open access: yes, 2019
Thesis: S.B., Massachusetts Institute of Technology, Department of Aeronautics and Astronautics, 2019Cataloged from PDF version of thesis.Includes bibliographical references (pages 24-30).Planetary cores are of interest because they provide insight into ...
Bates-Tarasewicz, Haley.
core  

The GPI Exoplanet Survey II: Atmospheres and Orbits of Substellar Companions to Young and Nearby Stars [PDF]

open access: yes, 2017
The Gemini Planet Imager Exoplanet Survey (GPIES) is a 600-star survey for young Jovian-mass exoplanets at Solar System scales. To date, GPIES has imaged six exoplanets and four brown dwarfs and has developed the data reduction tools necessary to ...
Ammons, Mark (5390143)   +161 more
core   +1 more source

Eccentricity Evolution of Warm Jupiters: The Role of Distant Perturbers and nearby Companions

open access: yesThe Astrophysical Journal
Warm Jupiters (WJs)—giant exoplanets with orbital periods between 10 and 200 days—exhibit a broad range of eccentricities and are often accompanied by nearby low-mass planets.
Ying He, Dong-Hong Wu, Sheng Jin
doaj   +1 more source

Multi-Scale Dynamics, Control, and Simulation of Granular Spacecraft [PDF]

open access: yes, 2013
In this paper, we present some ideas regarding the modeling, dynamics and control aspects of granular spacecraft. Granular spacecraft are complex multibody systems composed of a spatially disordered distribution of a large number of elements, for ...
Swartzlander, Grover   +2 more
core  

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