Results 71 to 80 of about 8,194 (235)

Exoplanet phase curves: observations and theory

, 2018
Phase curves are the best technique to probe the three dimensional structure of exoplanets' atmospheres. In this chapter we first review current exoplanets phase curve observations and the particular challenges they face.
A Shporer, A Shporer, Adam P. Showman, AP Showman, AP Showman, AP Showman, BO Demory, BO Demory, C Visscher, Curtis S. Cooper, D Perez-Becker, D Piskorz, D. J. Armstrong, DDB Koll, F Selsis, HA Knutson, HA Knutson, Heather A. Knutson, I Hubeny, Ian Wong, Ian Wong, IJM Crossfield, IJM Crossfield, IJM Crossfield, J Harrington, J Langton, J Leconte, J Leconte, J Wit de, J Yang, J. C. Schwartz, JC Schwartz, JE Krick, JJ Fortney, K Batygin, K Haynes, K Heng, K Heng, KB Stevenson, KB Stevenson, KB Stevenson, KB Stevenson, Kevin B. Stevenson, L Kreidberg, Lisa J. Esteves, M Agúndez, M Oreshenko, MR Line, MW Webber, N Iro, NB Cowan, NB Cowan, NB Cowan, Nicolas B. Cowan, NK Lewis, NK Lewis, P Hut, PFL Maxted, R Hu, R Perna, R Perna, Robert T. Zellem, RT Pierrehumbert, S Fromang, S Millholland, SM Tsai, SR Kane, T Guillot, T Kataria, T Kataria, TD Komacek, Thaddeus D. Komacek, TM Evans, TM Rogers, TM Rogers, UA Dyudina, V Parmentier, Vivien Parmentier, Vivien Parmentier, Vivien Parmentier, X Zhang, YK Feng   +81 more
core   +1 more source

Ion Escape From Degenerate Induced Magnetospheres: The Case of Mars

Geophysical Research Letters, Volume 52, Issue 12, 28 June 2025.
Abstract When the cone angle of the interplanetary magnetic field (IMF) becomes small, induced magnetospheres of unmagnetized planets degenerate. Using hybrid simulations, we study ionospheric ion escape in a 4° cone angle case and compare it with the nominal 55° cone angle (Parker spiral) case. The total escape rate is 1.7×1025 $1.7\times 1{0}^{25}$ s−
Qi Zhang, Stas Barabash, Mats Holmström, Xiao‐dong Wang, Yoshifumi Futaana, Christopher M. Fowler, Robin Ramstad, Hans Nilsson   +7 more
wiley   +1 more source

Dynamical Study of the Exoplanet Host Binary System HD 106515 [PDF]

Publications of the Astronomical Society of Australia, 2017
AbstractHD 106515 AB (STF1619 AB) is a high common proper motion and common radial velocity binary star system composed of two G-type bright stars located at 35 pc and separated by about 7 arcsec. This system was observed by theHipparcossatellite with a precision in distance and proper motion of 3 and 2%, respectively.
R. Barrena, J. A. Henríquez, F. M. Pérez, P. Vargas, F. M. Rica   +4 more
openaire   +1 more source

Exoplanet Occurrence Rate with Age for FGK Stars in Kepler

The Astronomical Journal
We measure the exoplanet occurrence rate as a function of isochrone and gyrochronology ages using confirmed and candidate planets identified in Q1–17 DR25 Kepler data. We employ Kepler's pipeline detection efficiency to correct for the expected number of
Maryum Sayeed, Ruth Angus, Travis A. Berger, Yuxi(Lucy) Lu, Jessie L. Christiansen, Daniel Foreman-Mackey, Melissa K. Ness   +6 more
doaj   +1 more source

Traveling Planetary-scale Waves Cause Cloud Variability on Tidally Locked Aquaplanets

The Planetary Science Journal, 2023
Cloud cover at the planetary limb of water-rich Earth-like planets is likely to weaken chemical signatures in transmission spectra, impeding attempts to characterize these atmospheres.
Maureen Cohen, Massimo A. Bollasina, Denis E. Sergeev, Paul I. Palmer, Nathan J. Mayne   +4 more
doaj   +1 more source

A Microphysics Model of Multicomponent Venus' Clouds With a High‐Accuracy Condensation Scheme

Earth and Space Science, Volume 12, Issue 6, June 2025.
Abstract Accurate modeling of the Venusian cloud structure remains challenging due to its complex microphysical properties. Condensation primarily determines the cloud particle size distribution within the various cloud layers. However, existing Venus microphysics models mainly use a full‐stationary bin scheme, which may be prone to numerical diffusion
H. Karyu, T. Kuroda, A. Mahieux, S. Viscardy, A. Määttänen, N. Terada, S. Robert, A. C. Vandaele, M. Crucifix   +8 more
wiley   +1 more source

The HD 191939 Exoplanet System is Well Aligned and Flat

The Astronomical Journal
We report the sky-projected spin–orbit angle λ for HD 191939 b, the innermost planet in a six-planet system, using Keck/KPF to detect the Rossiter–McLaughlin (RM) effect.
Jack Lubin, Erik A. Petigura, Judah Van Zandt, Corey Beard, Fei Dai, Samuel Halverson, Rae Holcomb, Andrew W. Howard, Howard Isaacson, Jacob Luhn, Paul Robertson, Ryan A. Rubenzahl, Guđmundur Stefánsson, Joshua N. Winn, Max Brodheim, William Deich, Grant M. Hill, Steven R. Gibson, Bradford Holden, Aaron Householder, Russ R. Laher, Kyle Lanclos, Joel Payne, Arpita Roy, Roger Smith, Abby P. Shaum, Christian Schwab, Josh Walawender   +27 more
doaj   +1 more source

Mass-radius relationships for exoplanets

, 2011
For planets other than Earth, interpretation of the composition and structure depends largely on comparing the mass and radius with the composition expected given their distance from the parent star.
Ackland, Adams, Albers, Barnes, Barnes, Barnes, Bastea, Batalha, Bushman, Carter, Charbonneau, Charbonneau, Clerouin, D. C. Swift, D. G. Hicks, E. Schwegler, Fortney, G. J. Ackland, G. W. Collins, Grasset, Henry, Holian, J. H. Eggert, Johnson, Johnson, Johnson, K. Caspersen, Kerley, Kerley, Kittel, Lindl, Luo, Lyon, McQueen, Michielsen, Mulford, N. Nettelmann, Press, S. Hamel, Schneider, Seager, Swift, Swift, van Thiel   +43 more
core   +1 more source

Atmospheric circulation of brown dwarfs and directly imaged exoplanets driven by cloud radiative feedback: global and equatorial dynamics [PDF]

, 2021
Xianyu Tan, Adam P. Showman
openalex   +1 more source

Multifluid Equations for MHD

Journal of Geophysical Research: Space Physics, Volume 130, Issue 6, June 2025.
Abstract A set of magnetohydrodynamic equations is developed for multiple ion species in the limit of small Larmor radius. The derivation proceeds to explicitly calculate the Lorentz force resulting from the small ion drift velocities. The net effect is that in this limit all the ions move perpendicular to the magnetic field with the same E×B $\mathbf ...
J. G. Lyon, V. G. Merkin, K. A. Sorathia, M. J. Wiltberger   +3 more
wiley   +1 more source