Results 51 to 60 of about 6,459 (144)

Bridging the Atmospheric Circulations of Hot and Warm Giant Exoplanets

The Astrophysical Journal
We perform high-resolution atmospheric flow simulations of hot and warm giant exoplanets that are tidally locked. The modeled atmospheres are representative of those on KELT-11 b and WASP-39 b, which possess markedly different equilibrium temperatures ...
J. W. Skinner, S. Wei
doaj   +1 more source

Neuromorphic Computing with Memcapacitors: Advancements, Challenges, and Future Directions

Advanced Electronic Materials, Volume 11, Issue 18, November 4, 2025.
Neuromorphic computing reduces energy costs by integrating memory and processing in event‐driven architectures, achieving energy usage as low as 10–30 pJ per operation for memcapacitor‐based synapses. Memcapacitors are reviewed as strong contenders for neuromorphic computing, enhancing AI acceleration through charge‐based computations, high resistance,
Nada AbuHamra, Muhammad Umair Khan, Eman Hassan, Mahmoud Al Qutayri, Baker Mohammad   +4 more
wiley   +1 more source

Coronal X-Ray Emission from Nearby, Low-mass, Exoplanet Host Stars Observed by the MUSCLES and Mega-MUSCLES HST Treasury Survey Projects

The Astronomical Journal, 2023
The high-energy X-ray and ultraviolet (UV) radiation fields of exoplanet host stars play a crucial role in controlling the atmospheric conditions and the potential habitability of exoplanets.
Alexander Brown, P. Christian Schneider, Kevin France, Cynthia S. Froning, Allison A. Youngblood, David J. Wilson, R. O. Parke Loyd, J. Sebastian Pineda, Girish M. Duvvuri, Adam F. Kowalski, Zachory K. Berta-Thompson   +10 more
doaj   +1 more source

Detection of an exoplanet around the evolved K giant HD 66141

, 2012
Aims. We have been carrying out a precise radial velocity (RV) survey for K giants to search for and study the origin of the lowamplitude and long-periodic RV variations. Methods. We present high-resolution RV measurements of the K2 giant HD 66141 from
Han, I., Kim, K. -M., Lee, B. -C., Mkrtichian, D. E., Park, M. -G.   +4 more
core   +1 more source

Mercury's Altered Magnetosphere During a Sub‐Alfvénic ICME Event: MESSENGER Observations and Inferred Asymmetric Alfvén Wing Formation From Global MHD Simulations

Journal of Geophysical Research: Space Physics, Volume 130, Issue 11, November 2025.
Abstract We present observations of a rare configuration of Mercury's magnetosphere in response to sub‐Alfvénic upstream conditions, driven by an interplanetary coronal mass ejection (ICME) that impacted the planet on 1 May 2013. Using data from the Mercury Surface, Space Environment, Geochemistry, and Ranging (MESSENGER) spacecraft, supported by a ...
Charles F. Bowers, Caitríona M. Jackman, Xianzhe Jia, Lina Z. Hadid, Weijie Sun, Laura A. Hayes, Ryan M. Dewey, Brandon Burkholder, Daragh M. Hollman, Sebastian Cervantes, Hans L. F. Huybrighs, Matthew J. Rutala   +11 more
wiley   +1 more source

Exoplanet Aeronomy: A Case Study of WASP-69 b’s Variable Thermosphere

The Astronomical Journal
Aeronomy, the study of Earth’s upper atmosphere and its interaction with the local space environment, has long traced changes in the thermospheres of Earth and other solar system planets to solar variability in the X-ray and extreme-ultraviolet ...
W. Garrett Levine, Shreyas Vissapragada, Adina D. Feinstein, George W. King, Aleck Hernandez, Lía Corrales, Michael Greklek-McKeon, Heather A. Knutson   +7 more
doaj   +1 more source

Influence of stellar variability on the determination of the radius during a transit of an exoplanet

EPJ Web of Conferences, 2011
Stellar variability can affect the estimate of an exoplanet radius measured during a transit. We developed a transit light curve model which includes stellar spots.
Désert J.-M., Lecavelier des Etangs A., Parmentier V., Sing D.   +3 more
doaj   +1 more source

Astro2020 Science White Paper: Toward Finding Earth 2.0: Masses and Orbits of Small Planets with Extreme Radial Velocity Precision [PDF]

, 2019
Having discovered that Earth-sized planets are common, we are now embarking on a journey to determine if Earth-like planets are also common. Finding Earth-like planets is one of the most compelling endeavors of the 21st century - leading us toward ...
Bean, Jacob, Burt, Jennifer, Ciardi, David R., Dragomir, Diana, Gaidos, Eric, Johnson, Marshall C., Kempton, Eliza, Konopacky, Quinn, Meyer, Michael, Teske, Johanna, Weiss, Lauren, Zhou, George   +11 more
core   +1 more source

Characterizing the Habitable Zones of Exoplanetary Systems with a Large Ultraviolet/Visible/Near-IR Space Observatory [PDF]

, 2015
Understanding the surface and atmospheric conditions of Earth-size, rocky planets in the habitable zones (HZs) of low-mass stars is currently one of the greatest astronomical endeavors.
Ayres, Thomas, Barman, Travis, Brown, Alexander, Davenport, James, Desert, Jean-Michel, Domagal-Goldman, Shawn, Fleming, Brian, Fontenla, Juan, Fossati, Luca, France, Kevin, Froning, Cynthia, Hallinan, Gregg, Hawley, Suzanne, Hu, Renyu, Kaltenegger, Lisa, Kasting, James, Kowlaski, Adam, Linsky, Jeffrey, Loyd, Parke, Mauas, Pablo, Miguel, Yamila, Osten, Rachel, Redfield, Seth, Roberge, Aki, Rugheimer, Sarah, Schneider, Christian, Segura, Antigona, Shkolnik, Evgenya, Stocke, John, Tian, Feng, Tumlinson, Jason, Vieytes, Mariela, Walkowicz, Lucianne, Wood, Brian, Youngblood, Allison   +34 more
core   +1 more source

The O2 A-band in fluxes and polarization of starlight reflected by Earth-like exoplanets

, 2017
Earth-like, potentially habitable exoplanets are prime targets in the search for extraterrestrial life. Information about their atmosphere and surface can be derived by analyzing light of the parent star reflected by the planet.
Fauchez, Thomas, Rossi, Loic, Stam, Daphne M.   +2 more
core   +1 more source