Results 21 to 30 of about 2,690,574 (274)

Colloquium: Physical constraints for the evolution of life on exoplanets [PDF]

Reviews of Modern Physics, 2019
Since the 1990s over 4000 exoplanets have been discovered: which of them could also develop and harbor life? It is posited that the planet must have liquid water, a surrounding atmosphere, and must be both biocompatible and possess the bioessential elements to be habitable.
Manasvi Lingam, Abraham Loeb
openalex   +4 more sources

Magnetic and tidal interactions in spin evolution of exoplanets [PDF]

Proceedings of the International Astronomical Union, 2008
AbstractThe axis-rotational evolution of exoplanets on close orbits strongly depends on their magnetic and tidal interactions with the parent stars. Impulsive perturbations from a star created by periodical activity may accumulate with time and lead to significant long-term perturbations of the planet spin evolution.
Irina Kitiashvili
openalex   +3 more sources

Tidal evolution of close-in exoplanets in co-orbital configurations [PDF]

Celestial Mechanics and Dynamical Astronomy, 2013
In this paper, we study the behavior of a pair of co-orbital planets, both orbiting a central star on the same plane and undergoing tidal interactions. Our goal is to investigate final orbital configurations of the planets, initially involved in the 1/1 mean-motion resonance (MMR), after long-lasting tidal evolution.
Adrián Rodríguez, C. A. Giuppone, T. A. Michtchenko   +2 more
openalex   +6 more sources

EUV influences on exoplanet atmospheric stability and evolution

, 2019
The planetary effective surface temperature alone is insufficient to characterize exoplanet atmospheres and their stability or evolution. Considering the star-planet system as a whole is necessary, and a critical component of the system is the photoionizing stellar extreme ultraviolet emission (EUV; 100-912 ).
Allison Youngblood, Kevin France, Tommi Koskinen, L. Fossati, Ute Amerstorfer, Herbert Lichtenegger, J. J. Drake, James Mason, Brian Fleming, Joel C. Allred, Zachory K. Berta-Thompson, V. Bourrier, Cynthia S. Froning, Cecilia Garraffo, Guillaume Gronoff, Meng Jin, Adam F. Kowalski, Rachel A. Osten   +17 more
openalex   +4 more sources

Magnetic Field Evolution of Hot Exoplanets

Monthly Notices of the Royal Astronomical Society
ABSTRACT Numerical simulations have shown that the strength of planetary magnetic fields depends on the convective energy flux emerging from planetary interiors. Here, we model the interior structure of gas giant planets using mesa, to determine the convective energy flux that can drive the generation of magnetic field. This flux is then
K Kilmetis, A. A. Vidotto, Andrew Allan, Daria Kubyshkina   +3 more
openalex   +4 more sources

Evolution of the Exoplanet Size Distribution: Forming Large Super-Earths Over Billions of Years [PDF]

Astronomical Journal, 2021
The radius valley, a bifurcation in the size distribution of small, close-in exoplanets, is hypothesized to be a signature of planetary atmospheric loss. Such an evolutionary phenomenon should depend on the age of the star–planet system. In this work, we
Trevor J. David, Gabriella Contardo, Angeli Sandoval, Ruth Angus, Yuxi Lu, Megan Bedell, Jason L. Curtis, Daniel Foreman-Mackey, Benjamin J. Fulton, Samuel K. Grunblatt, Erik A. Petigura   +10 more
openalex   +3 more sources

Resonant and Ultra-short-period Planet Systems Are at Opposite Ends of the Exoplanet Age Distribution

The Astronomical Journal
Exoplanet systems are thought to evolve on secular timescales over billions of years. This evolution is impossible to directly observe on human timescales in most individual systems.
Stephen P. Schmidt, Kevin C. Schlaufman, Jacob H. Hamer   +2 more
doaj   +2 more sources

APPLE: An Evolution Code for Modeling Giant Planets

The Astrophysical Journal
We introduce APPLE , a novel planetary evolution code designed specifically for the study of giant exoplanet and Jovian planet evolution in the era of Galileo, Juno, and Cassini. With APPLE , state-of-the-art equations of state for hydrogen, helium, ice,
Ankan Sur, Yubo Su, Roberto Tejada Arevalo, Yi-Xian Chen, Adam Burrows   +4 more
doaj   +2 more sources

Thermal evolution of rocky exoplanets with a graphite outer shell [PDF]

A&A 630, A152 (2019), 2019
The presence of rocky exoplanets with a large refractory carbon inventory is predicted by chemical evolution models of protoplanetary disks of stars with photospheric C/O >0.65, and by models studying the radial transport of refractory carbon. High-pressure high-temperature laboratory experiments show that most of the carbon in these exoplanets ...
Kaustubh Hakim, Arie van den Berg, Allona Vazan, Dennis Höning, W. van Westrenen, C. Dominik   +5 more
openalex   +2 more sources

The evolution of hot Jupiters revealed by the age distribution of their host stars. [PDF]

Proc Natl Acad Sci U S A, 2023
Significance Hot Jupiters are the first exoplanet population discovered around main-sequence stars. However, their origin and evolution remain puzzled.
Chen DC, Xie JW, Zhou JL, Dong S, Yang JY, Zhu W, Liu C, Huang Y, Xiang MS, Wang HF, Zheng Z, Luo AL, Zhang JH, Zhu Z.   +13 more
europepmc   +3 more sources