Results 121 to 130 of about 8,820 (196)

Architectures of Exoplanetary Systems. IV. A Multiplanet Model for Reproducing the Radius Valley and Intrasystem Size Similarity of Planets around Kepler’s FGK Dwarfs

The Astrophysical Journal
The Kepler-observed distribution of planet sizes has revealed two distinct patterns: (1) a radius valley separating super-Earths and sub-Neptunes and (2) a preference for intrasystem size similarity.
Matthias Y. He, Eric B. Ford
doaj   +1 more source

Astrophysics datamining in the classroom: Exploring real data with new software tools and robotic telescopes

, 2012
Within the efforts to bring frontline interactive astrophysics and astronomy to the classroom, the Hands on Universe (HOU) developed a set of exercises and platform using real data obtained by some of the most advanced ground and space observatories. The
Almeida, Maria L. T., Barbosa, Domingos, Boudier, Thomas, Delva, Doran, Rosa, Ferlet, Roger, Gomez, Edward, Melchior, Anne-Laure, Pacôme, Pennypacker, Carl, Roberts, Sarah, Roche, Paul   +11 more
core  

Terrestrial Exoplanet Internal Structure Constraints Enabled by Comprehensive Host Star Characterization Reveal That Terrestrial Planets in Mean Motion Resonances Are Water Rich

The Astrophysical Journal
Exoplanet mass and radius inferences fundamentally rely on host star mass and radius inferences. Despite the importance of host star mass, radius, and elemental abundance inferences for the derivation of exoplanet internal structure constraints ...
Alejandra Ross, Henrique Reggiani, Kevin C. Schlaufman, Mykhaylo Plotnykov, Diana Valencia   +4 more
doaj   +1 more source

Hot Spot Offset Variability from Magnetohydrodynamical Thermoresistive Instability in Hot Jupiters

The Astrophysical Journal
Hot Jupiter (HJ) atmospheres are possibly subject to a thermoresistive instability (TRI). Such an instability may develop as the ohmic heating increases the electrical conductivity in a positive feedback loop, which ultimately leads to a runaway of the ...
Raphaël Hardy, Paul Charbonneau, Andrew Cumming   +2 more
doaj   +1 more source

Unexpected Near-Resonant and Metastable States of Young Multiplanet Systems

The Astrophysical Journal
Recent observations suggest that the incidence of near-resonant planets declines as planetary systems age, making young planetary systems key signposts of early dynamical evolution.
Zhecheng Hu, Fei Dai, Wei Zhu, Mu-Tian Wang, Max Goldberg, Caleb Lammers, Kento Masuda   +6 more
doaj   +1 more source

Clouds and Hazes in GJ 1214 b’s Metal-rich Atmosphere

The Astronomical Journal
The sub-Neptune GJ 1214 b has an infamously flat transmission spectrum, likely due to thick aerosols in its atmosphere. A recent JWST/MIRI spectroscopic phase curve of GJ 1214 b added to this picture, suggesting a highly reflective and metal-rich ...
Isaac Malsky, Emily Rauscher, Kevin Stevenson, Arjun B. Savel, Maria E. Steinrueck, Peter Gao, Eliza M.-R. Kempton, Michael T. Roman, Jacob L. Bean, Michael Zhang, Vivien Parmentier, Anjali A. A. Piette, Tiffany Kataria   +12 more
doaj   +1 more source

Hic Sunt Dracones: Uncovering Dynamical Perturbers within the Habitable Zone

The Astronomical Journal
The continuing exploration of neighboring planetary systems is providing deeper insights into the relative prevalence of various system architectures, particularly with respect to the solar system.
Stephen R. Kane, Jennifer A. Burt
doaj   +1 more source

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

Warm Jupiter Tidal Migration Can Spare Inner Planets; Hot Jupiter Tidal Migration May Not

The Astrophysical Journal
In this work, we investigate the dynamical survival of short-period inner planets during the high-eccentricity tidal migration of companion exterior giant planets.
Juliette Becker
doaj   +1 more source

No Strong Associations between Eccentricity and Orbital Architecture in Kepler Compact Multis

The Astronomical Journal
The dynamical history of a planetary system is recorded in the present day architecture of its constituent planets’ sizes, orbital periods, and eccentricities.
Gregory J. Gilbert, Erik A. Petigura, Paige M. Entrican   +2 more
doaj   +1 more source