Results 1 to 10 of about 1,480 (207)

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

open access: greenThe 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   +3 more sources

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

open access: greenThe 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   +3 more sources

Resonant and Ultra-short-period Planet Systems Are at Opposite Ends of the Exoplanet Age Distribution

open access: goldThe Astronomical Journal
Exoplanet systems are thought to evolve on secular timescales over billions of years. This evolution is impossible to directly observe on human timescales in most individual systems.
Stephen P. Schmidt   +2 more
doaj   +2 more sources

A Comparison of the Composition of Planets in Single-planet and Multiplanet Systems Orbiting M dwarfs

open access: yesThe Astronomical Journal, 2023
We investigate and compare the composition of M-dwarf planets in systems with only one known planet (“singles”) to those residing in multiplanet systems (“multis”) and the fundamental properties of their host stars.
Romy Rodríguez Martínez   +6 more
doaj   +1 more source

Kepler-80 Revisited: Assessing the Participation of a Newly Discovered Planet in the Resonant Chain

open access: yesThe Astronomical Journal, 2023
In this paper, we consider the chain of resonances in the Kepler-80 system and evaluate the impact that the additional member of the resonant chain discovered by Shallue & Vanderburg has on the dynamics of the system and the physical parameters that can ...
D. Weisserman   +2 more
doaj   +1 more source

Validation of TOI-1221 b: A Warm Sub-Neptune Exhibiting Transit Timing Variations around a Sun-like Star

open access: yesThe Astronomical Journal, 2023
We present a validation of a long-period ( ${91.68278}_{-0.00041}^{+0.00032}$ days) transiting sub-Neptune planet, TOI-1221 b (TIC 349095149.01), around a Sun-like ( m _V = 10.5) star.
Christopher Mann   +27 more
doaj   +1 more source

ROME. III. The Arecibo Search for Star–Planet Interactions at 5 GHz

open access: yesThe 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
doaj   +1 more source

Validating AU Microscopii d with Transit Timing Variations

open access: yesThe Astronomical Journal, 2023
AU Mic is a young (22 Myr), nearby exoplanetary system that exhibits excess transit timing variations (TTVs) that cannot be accounted for by the two known transiting planets nor stellar activity.
Justin M. Wittrock   +33 more
doaj   +1 more source

DYNAMIC EVOLUTION EXOPLANET SYSTEMS, MOVING IN ORBITAL RESONANCES WITH THE ACCOUNT OF SECULAR PERTURBATION FROM N BODIES

open access: yesOdessa Astronomical Publications, 2017
Equations of exoplanet's motion connected with orbital Lindblad resonances with the account of secular terms caused by gravitational non-resonant perturbation are derived. Qualitative researches of orbital evolution modeling exoplanet systems are carried
B. R. Mushailov, A. K. Chuyas
doaj   +1 more source

VaTEST. II. Statistical Validation of 11 TESS-detected Exoplanets Orbiting K-type Stars

open access: yesThe Astronomical Journal, 2023
NASA’s Transiting Exoplanet Survey Satellite (TESS) is an all-sky survey mission designed to find transiting exoplanets orbiting nearby bright stars. It has identified more than 329 transiting exoplanets, and almost 6000 candidates remain unvalidated. In
Priyashkumar Mistry   +50 more
doaj   +1 more source

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