Results 101 to 110 of about 10,242 (205)

Long-term Variations in the Orbital Period of Hot Jupiters from Transit-timing Analysis Using TESS Survey Data

The Astrophysical Journal Supplement Series
Many hot Jupiters may experience orbital decays, which are manifested as long-term transit-timing variations. We have analyzed 7068 transits from the Transiting Exoplanet Survey Satellite (TESS) for a sample of 326 hot Jupiters.
Wenqin Wang, Zixin Zhang, Zhangliang Chen, Yonghao Wang, Cong Yu, Bo Ma   +5 more
doaj   +1 more source

Exoplanet Nodal Precession Induced by Rapidly Rotating Stars: Impacts on Transit Probabilities and Biases

The Astrophysical Journal, 2023
For the majority of short-period exoplanets transiting massive stars with radiative envelopes, the spin angular momentum of the host star is greater than the planetary orbital angular momentum.
Alexander P. Stephan, B. Scott Gaudi
doaj   +1 more source

Comprehensive Characterization of Water Group Ion Composition and Distributions in Saturn's Magnetosphere With Cassini Plasma Spectrometer Data

Journal of Geophysical Research: Space Physics, Volume 131, Issue 4, April 2026.
Abstract Saturn's magnetosphere is continuously supplied with neutrals from the Enceladus plume and the icy rings, which undergo ionization and charge‐exchange to form a complex water‐group plasma environment. While the Cassini Plasma Spectrometer (CAPS) instrument has provided extensive compositional information, detailed separation of individual ...
Thomas K. Kim, D. B. Reisenfeld, R. J. Wilson, H. T. Smith, A. K. Woodson, F. Allegrini, R. W. Ebert, M. G. Henderson, P. K. Kollmann, G. Livadiotis, G. Nicolaou, J. R. Szalay, P. W. Valek, A. Masters   +13 more
wiley   +1 more source

The Heating Efficiency of Hot Jupiters from a Data-driven Perspective

The Astronomical Journal
The inflated radii of hot Jupiters have been explored by various theoretical mechanisms. By connecting planetary thermal evolution models with the observed properties of hot Jupiters using hierarchical Bayesian models, a theoretical parameter called the ...
Sheng Jin, Dong-Hong Wu, Yi-Xuan Cao, Zi-Yi Guo   +3 more
doaj   +1 more source

Structure and Evolution of Internally Heated Hot Jupiters

, 2017
Hot Jupiters receive strong stellar irradiation, producing equilibrium temperatures of $1000 - 2500 \ \mathrm{Kelvin}$. Incoming irradiation directly heats just their thin outer layer, down to pressures of $\sim 0.1 \ \mathrm{bars}$.
Komacek, Thaddeus D., Youdin, Andrew N.
core   +1 more source

Modeling Ganymede's Surface Charging in Preparation for the JUICE Mission

Journal of Geophysical Research: Space Physics, Volume 131, Issue 4, April 2026.
Abstract The European Space Agency's (ESA) JUICE mission (JUpiter ICy moons Explorer) is en route to the Jovian system to characterize Ganymede's subsurface ocean. Determining the ocean's conductivity and depth requires precise measurements of its induced magnetic field at the position of JUICE.
Betty Pei‐Chun Tsai, Elias Roussos, Ronan Modolo, Mika K. G. Holmberg, Xianzhe Jia, Tom Nordheim, Sachin Alexander Reddy, Norbert Krupp, Markus Fränz, Yasuhito Narita, Christina Plainaki   +10 more
wiley   +1 more source

Evidence for Primordial Alignment II: Insights from Stellar Obliquity Measurements for Hot Jupiters in Compact Multiplanet Systems

The Astronomical Journal
A significant fraction of hot Jupiters have orbital axes misaligned with their host stars’ spin axes. The large stellar obliquities of these giants have long been considered potential signatures of high-eccentricity migration, which is expected to clear ...
Brandon T. Radzom, Jiayin Dong, Malena Rice, Xian-Yu Wang, Kyle Hixenbaugh, George Zhou, Chelsea X. Huang, Songhu Wang   +7 more
doaj   +1 more source

A Panspermia Origin for Venus Cloud Life

Journal of Geophysical Research: Planets, Volume 131, Issue 4, April 2026.
Abstract Decades of study have hinted at the astrobiological potential of Venus's cloud layers. This potential is often cast as stemming from the idea that the Venusian surface was clement in the past. As the climate changed, life then remained in, or perhaps evolved and migrated to, the last habitable niche: the altitudes above ∼50 km with Earth‐like ...
E. Guinan, T. J. Austin, J. G. O’Rourke, N. G. Izenberg, E. A. Silber, E. Trembath‐Reichert   +5 more
wiley   +1 more source

Towards Chemical Constraints on Hot Jupiter Migration

, 2014
The origin of hot Jupiters -- gas giant exoplanets orbiting very close to their host stars -- is a long-standing puzzle. Planet formation theories suggest that such planets are unlikely to have formed in-situ but instead may have formed at large orbital ...
Amin, Mustafa A., Kennedy, Grant M., Madhusudhan, Nikku   +2 more
core   +1 more source

Characterization of the Outer Uranian Rings in the Visual and Near‐IR Using Keck, JWST, and HST Observations

Journal of Geophysical Research: Planets, Volume 131, Issue 4, April 2026.
Abstract We present observations of the Uranian outer ring system at near‐infrared and visible wavelengths. Observations with the Keck Telescope were taken in July‐August 2007 at 2.12 and 1.63 μm, when the ring plane was almost edge‐on (ring opening angle B=0.62 $B=0.62$–0.24° ${}^{\circ}$). These data showed, for the first time, the μ ring at infrared
Imke de Pater, Mark R. Showalter, Matt M. Hedman, Heidi B. Hammel, Mike Roman, Leigh N. Fletcher, Maryame El Moutamid, Damya Souami   +7 more
wiley   +1 more source