Results 141 to 150 of about 404,312 (236)

Up, Up, and Away: Winds and Dynamical Structure as a Function of Altitude in the Ultrahot Jupiter WASP-76b

The Astrophysical Journal
Due to the unprecedented signal strengths offered by the newest high-resolution spectrographs on 10 m class telescopes, exploring the 3D nature of exoplanets is possible with an unprecedented level of precision.
Aurora Y. Kesseli, Hayley Beltz, Emily Rauscher, I. A. G. Snellen   +3 more
doaj   +1 more source

The Orbital Geometries and Stellar Obliquities of Exoplanet-Hosting Multi-Star Systems [PDF]

arXiv
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 multi-star systems, which may have their evolution shaped by the gravitational influence of bound stellar companions. In this work, we examine the joint
arxiv  

Carving Out the Inner Edge of the Period Ratio Distribution through Giant Impacts

The Astrophysical Journal
The distribution of orbital period ratios between adjacent observed exoplanets is approximately uniform, but exhibits a strong falloff toward close orbital separations.
Kaitlyn Chen, Oswaldo Cardenas, Brandon Bonifacio, Nikolas Hall, Rori Kang, Daniel Tamayo   +5 more
doaj   +1 more source

Kepler-discovered Multiple-planet Systems near Period Ratios Suggestive of Mean-motion Resonances Are Young

The Astronomical Journal
Before the launch of the Kepler Space Telescope, models of low-mass planet formation predicted that convergent type I migration would often produce systems of low-mass planets in low-order mean-motion resonances.
Jacob H. Hamer, Kevin C. Schlaufman
doaj   +1 more source

Observational Signatures of a Previous Dynamical Instability in Multi-planet M-dwarf Systems

The Astrophysical Journal
We identify observational signatures suggesting a history of dynamical instability in 26 out of 34 M-dwarf multi-planet systems containing no large planets.
Anna C. Childs, Alexa P. S. Hua, Rebecca G. Martin, Chao-Chin Yang, Aaron M. Geller   +4 more
doaj   +1 more source

An Obliquity Measurement of the Hot Neptune TOI-1694b

The Astronomical Journal
We present spectral observations of the multiplanet host TOI-1694 during the transit of TOI-1694b, a 26.1 M _⊕ hot Neptune with a 3.77 day orbit. By analyzing radial velocities obtained from the Keck Planet Finder, we modeled the Rossiter–McLaughlin ...
Luke B. Handley, Andrew W. Howard, Ryan A. Rubenzahl, Fei Dai, Dakotah Tyler, Rena A. Lee, Steven Giacalone, Howard Isaacson, Benjamin Fulton, Aaron Householder, Samuel Halverson, Arpita Roy, Josh Walawender   +12 more
doaj   +1 more source

The orbital eccentricity distribution of planets orbiting M dwarfs. [PDF]

Proc Natl Acad Sci U S A, 2023
Sagear S, Ballard S.
europepmc   +1 more source

Salty ice and the dilemma of ocean exoplanet habitability. [PDF]

Nat Commun, 2022
Journaux B.
europepmc   +1 more source

Synergies Between Venus & Exoplanetary Observations: Venus and Its Extrasolar Siblings. [PDF]

Space Sci Rev, 2023
Way MJ, Ostberg C, Foley BJ, Gillmann C, Höning D, Lammer H, O'Rourke J, Persson M, Plesa AC, Salvador A, Scherf M, Weller M.   +11 more
europepmc   +1 more source

A Larger Sample Confirms Small Planets around Hot Stars Are Misaligned

The Astrophysical Journal Letters
The distribution of stellar obliquities provides critical insight into the formation and evolution pathways of exoplanets. In the past decade, it was found that hot stars hosting hot Jupiters are more likely to have high obliquities than cool stars, but ...
Emma M. Louden, Songhu Wang, Joshua N. Winn, Erik A. Petigura, Howard Isaacson, Luke Handley, Samuel W. Yee, Corey Beard, Joseph M. Akana Murphy, Gregory Laughlin   +9 more
doaj   +1 more source