Results 81 to 90 of about 5,562 (188)

The Exoplanet Census: A General Method, Applied to Kepler

, 2011
We develop a general method to fit the planetary distribution function (PLDF) to exoplanet survey data. This maximum likelihood method accommodates more than one planet per star and any number of planet or target star properties.
Andrew N. Youdin, Borucki, Burke, Catanzarite, Fischer, Gaudi, Gonzalez, Hansen, Howard, Johansen, Kenyon, Kratter, Latham, Lissauer, Marcy, Moorhead, Morton, Ragozzine, Tingley, Tremaine, Youdin, Youdin   +21 more
core   +1 more source

Atomic‐Scale Study of Intercrystalline (Mg,Fe)O in Planetary Mantles: Mechanics and Thermodynamics of Grain Boundaries Under Pressure

Journal of Geophysical Research: Solid Earth, Volume 129, Issue 5, May 2024.
Abstract Polycrystalline (Mg,Fe)O ferropericlase is the second most abundant mantle constituent of the Earth and possibly of super‐Earth exoplanets. Its mechanical behavior is expected to accommodate substantial plastic deformation in Earth's lower mantle.
Sebastian Ritterbex, Taku Tsuchiya, Martyn Drury, Oliver Plümper   +3 more
wiley   +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

Prebiotic Vitamin B3 Synthesis in Carbonaceous Planetesimals

ChemPlusChem, Volume 89, Issue 4, April 2024.
Aqueous chemistry inside meteorite parent bodies allows the formation of prebiotic molecules crucial for all life in the early solar system. We present a reaction mechanism suitable for vitamin B3 synthesis in this environment, which is experimentally verified in the literature.
Klaus Paschek, Mijin Lee, Dmitry A. Semenov, Thomas K. Henning   +3 more
wiley   +1 more source

Are WASP-107-like Systems Consistent with High-eccentricity Migration?

The Astrophysical Journal
WASP-107 b seems to be a poster child of the long-suspected high-eccentricity migration scenario. It is on a 5.7 day, polar orbit. The planet is Jupiter-like in radius but Neptune-like in mass with exceptionally low density.
Hang Yu, Fei Dai
doaj   +1 more source

Forming Different Planetary Systems

, 2012
With the increasing number of detected exoplanet samples, the statistical properties of planetary systems have become much clearer. In this review, we summarize the major statistics that have been revealed mainly by radial velocity and transiting ...
Armitage, Batalha, Batygin, Binney, Borucki, Burkert, Butler, Butler, Chatterjee, Cieza, Cuzzi, Dawson, Duquennoy, Eggenberger, Endl, Fabrycky, Fabrycky, Fischer, Ford, Ford, Fortney, Fregeau, Gaudi, Gilliland, Gonzalez, Gould, Guedes, Haghighipour, Haghighipour, Haisch, Hatzes, Heppenheimer, Hernández, Holman, Howard, Hui Zhang, Hui-Gen Liu, Ida, Ida, Ida, Ida, Ikoma, Jang-Condell, Ji-Lin Zhou, Ji-Wei Xie, Johnson, Johnson, Jurić, Kaib, Kennedy, Kley, Kley, Kokubo, Kratter, Larwood, Laughlin, Lee, Lee, Levison, Lithwick, Lithwick, Liu, Marcy, Marti, Marzari, Marzari, Matsumura, Matsuyama, Mayer, Mayor, Mayor, Meschiari, Mochejska, Murray, Nagasawa, Nagasawa, Nagasawa, Naoz, Ormel, Pascucci, Perets, Perets, Pfahl, Pätzold, Qian, Queloz, Quinn, Quintana, Quintana, Rafikov, Rafikov, Raghavan, Raghavan, Rosvick, Saleh, Sato, Schlaufman, Socrates, Sozzetti, Spurzem, Stewart, Takeda, Tanaka, Terquem, Tremaine, Wang, Wang, Weidenschilling, Weldrake, Weldrake, Winn, Wittenmyer, Wittenmyer, Wittenmyer, Wright, Wright, Wright, Wu, Wu, Wu, Xie, Xie, Xie, Xie, Yasui, Yi-Sui Sun, Youdin, Zhang, Zhang, Zhao, Zhou, Zhou, Zhou, Zucker, Zucker   +134 more
core   +1 more source

TESS Giants Transiting Giants. VI. Newly Discovered Hot Jupiters Provide Evidence for Efficient Obliquity Damping after the Main Sequence

The Astronomical Journal
The degree of alignment between a star’s spin axis and the orbital plane of its planets (the stellar obliquity) is related to interesting and poorly understood processes that occur during planet formation and evolution.
Nicholas Saunders, Samuel K. Grunblatt, Ashley Chontos, Fei Dai, Daniel Huber, Jingwen Zhang, Guđmundur Stefánsson, Jennifer L. van Saders, Joshua N. Winn, Daniel Hey, Andrew W. Howard, Benjamin Fulton, Howard Isaacson, Corey Beard, Steven Giacalone, Judah Van Zandt, Joseph M. Akana Murphey, Malena Rice, Sarah Blunt, Emma Turtelboom, Paul A. Dalba, Jack Lubin, Casey Brinkman, Emma M. Louden, Emma Page, Cristilyn N. Watkins, Karen A. Collins, Chris Stockdale, Thiam-Guan Tan, Richard P. Schwarz, Bob Massey, Steve B. Howell, Andrew Vanderburg, George R. Ricker, Jon M. Jenkins, Sara Seager, Jessie L. Christiansen, Tansu Daylan, Ben Falk, Max Brodheim, Steven R. Gibson, Grant M. Hill, Bradford Holden, Aaron Householder, Stephen Kaye, Russ R. Laher, Kyle Lanclos, Erik A. Petigura, Arpita Roy, Ryan A. Rubenzahl, Christian Schwab, Abby P. Shaum, Martin M. Sirk, Christopher L. Smith, Josh Walawender, Sherry Yeh   +55 more
doaj   +1 more source

Where Are the Water Worlds? Identifying Exo-water-worlds Using Models of Planet Formation and Atmospheric Evolution

The Astrophysical Journal
Planet formation models suggest that the small exoplanets that migrate from beyond the snowline of the protoplanetary disk likely contain water-ice-rich cores (∼50% by mass), also known as water worlds.
Aritra Chakrabarty, Gijs D. Mulders
doaj   +1 more source

Most Hot Jupiters Were Cool Giant Planets for More Than 1 Gyr

The Astronomical Journal
The origin of hot Jupiters is the oldest problem in exoplanet astrophysics. Hot Jupiters formed in situ or via disk migration should be in place just a few million years after the formation of their host stars.
Stephen P. Schmidt, Kevin C. Schlaufman
doaj   +1 more source

The Impact-driven Atmospheric Loss of Super-Earths around Different Spectral Types of Host Stars

The Astrophysical Journal
A planet’s mass loss is important for the its formation and evolution. The radius valley (RV) is believed to be triggered by evaporation-induced mass loss.
Wei Zhong, Cong Yu, Shi Jia, Shang-Fei Liu   +3 more
doaj   +1 more source