Results 1 to 10 of about 22,639,627 (262)

On the Ordering of Exoplanet Systems

open access: goldThe Astrophysical Journal
We present a comprehensive analysis of planetary radius ordering within multiplanet systems, namely their ordinal position with respect to their size in a given system, utilizing data from the NASA Exoplanet Archive. In addition, we consider not only the
Michael Lozovsky, Hagai B. Perets
doaj   +5 more sources

Planetesimal Compositions in Exoplanet Systems [PDF]

open access: yesThe Astrophysical Journal, 2012
We have used recent surveys of the composition of exoplanet host stars to investigate the expected composition of condensed material in planetesimals formed beyond the snow line in the circumstellar nebulae of these systems.
Bockelée-Morvan   +26 more
core   +8 more sources

Two Suns in The Sky: Stellar Multiplicity in Exoplanet Systems [PDF]

open access: green, 2006
We present results of a reconnaissance for stellar companions to all 131 radial-velocity-detected candidate extrasolar planetary systems known as of July 1, 2005.
Beaulieu, Thom D.   +6 more
core   +7 more sources

SPIN–ORBIT ALIGNMENT OF EXOPLANET SYSTEMS: ENSEMBLE ANALYSIS USING ASTEROSEISMOLOGY [PDF]

open access: bronzeThe Astrophysical Journal, 2016
The angle ψ between a planet’s orbital axis and the spin axis of its parent star is an important diagnostic of planet formation, migration, and tidal evolution.
T. L. Campante   +25 more
semanticscholar   +10 more sources

Evidence for Low-level Dynamical Excitation in Near-resonant Exoplanet Systems [PDF]

open access: yesThe Astronomical Journal, 2023
The geometries of near-resonant planetary systems offer a relatively pristine window into the initial conditions of exoplanet systems. Given that near-resonant systems have likely experienced minimal dynamical disruptions, the spin–orbit orientations of ...
Malena Rice   +20 more
doaj   +2 more sources

Correlations between the stellar, planetary, and debris components of exoplanet systems observed byHerschel [PDF]

open access: bronzeAstronomy & Astrophysics, 2014
Context. Stars form surrounded by gas- and dust-rich protoplanetary discs. Generally, these discs dissipate over a few (3–10) Myr, leaving a faint tenuous debris disc composed of second-generation dust produced by the attrition of larger bodies formed in
J. P. Marshall   +20 more
openalex   +3 more sources

The JWST Early Release Science Program for Direct Observations of Exoplanetary Systems I: High-contrast Imaging of the Exoplanet HIP 65426 b from 2 to 16 μm [PDF]

open access: goldAstrophysical Journal Letters, 2023
We present JWST Early Release Science coronagraphic observations of the super-Jupiter exoplanet, HIP 65426b, with the Near-Infrared Camera (NIRCam) from 2 to 5 μm, and with the Mid-Infrared Instrument (MIRI) from 11 to 16 μm.
Aarynn L. Carter   +99 more
openalex   +3 more sources

Radio-loud Exoplanet-exomoon Survey: GMRT Search for Electron Cyclotron Maser Emission [PDF]

open access: yesThe Astronomical Journal, 2022
We conducted the first dedicated search for signatures of exoplanet–exomoon interactions using the Giant Metrewave Radio Telescope (GMRT) as part of the radio-loud exoplanet-exomoon survey.
Mayank Narang   +5 more
doaj   +2 more sources

The Orbital Geometries and Stellar Obliquities of Exoplanet-hosting Multistar Systems

open access: yesThe Astronomical Journal
The current orbital geometries of exoplanet systems offer a fossilized record of the systems’ dynamical histories. A particularly rich set of dynamical mechanisms is available to exoplanets residing in multistar systems, which may have their evolution ...
Malena Rice   +2 more
doaj   +2 more sources

EVIDENCE OF POSSIBLE SPIN-ORBIT MISALIGNMENT ALONG THE LINE OF SIGHT IN TRANSITING EXOPLANET SYSTEMS [PDF]

open access: bronze, 2010
Of the 26 transiting exoplanet systems with measurements of the Rossiter–McLaughlin (RM) effect, eight have now been found to be significantly spin–orbit misaligned in the plane of the sky (i.e., RM misalignment angle |λ| ≳ 30° and inconsistent with λ ...
Kevin C. Schlaufman
openalex   +3 more sources

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