Results 51 to 60 of about 2,199 (282)

Star-Planet Interactions: The Instrumentation Perspective [PDF]

Submitted to Space Science Reviews.
H Korhonen, P. Figueira, B. Montet, S. P. Jarvinen, H . K. Vedantham, S Narendranath, P. Chaturvedi   +6 more
openalex   +3 more sources

Impact of MgO Additions on the Oxidation Resistance and Compression Behavior of Vanadium Alloys

Advanced Engineering Materials, EarlyView.
An increase in oxidation resistance at 600 °C is achieved for alloys containing more than 2.5 wt.% MgO. It has been established that, along with V2O5, MgO6V2, and Mg2O7V2 are formed, which are presumed to enhance oxidative stability. Furthermore, the possible transformation of Mg‐vanadates through reaction with CO2, which presumably occurs in this ...
Ievgen Solodkyi, Mathias Galetz, Georg Hasemann, Fabian Lanoy, Emma White, Manja Krüger   +5 more
wiley   +1 more source

Tilted Circumbinary Planetary Systems as Efficient Progenitors of Free-floating Planets

The Astrophysical Journal Letters
The dominant mechanism for generating free-floating planets has so far remained elusive. One suggested mechanism is that planets are ejected from planetary systems due to planet–planet interactions.
Cheng Chen, Rebecca G. Martin, Stephen H. Lubow, C. J. Nixon   +3 more
doaj   +1 more source

Metrics for Optimizing Searches for Tidally Decaying Exoplanets

The Astronomical Journal, 2023
Tidal interactions between short-period exoplanets and their host stars drive orbital decay and have likely led to engulfment of planets by their stars.
Brian Jackson, Elisabeth R. Adams, Jeffrey P. Morgenthaler   +2 more
doaj   +1 more source

Star-planet interaction through spectral lines [PDF]

Proceedings of the International Astronomical Union, 2019
AbstractThe growth of spectroscopic observations of exoplanetary systems allows the possibility of testing theoretical models and studying the interaction that exoplanetary atmospheres have with the wind and the energetic photons from the star.
C. Villarreal D’Angelo, A. A. Vidotto, A. Esquivel, M. A. Sgró, T. Koskinen, L. Fossati   +5 more
openaire   +2 more sources

Graphene Quantum Dot‐Induced Microstrain for Framework Stabilization of High‐Entropy Prussian Blue Analog in High‐Current Alkaline Hydrogen Evolution Reaction

Advanced Functional Materials, EarlyView.
The intrinsic distortion‐rich lattice of HEPBA with GQD‐enabled microstrain engineering establishes a mechanistic route toward high‐performance alkaline hydrogen evolution reaction. HEPBA inherently feature heterogeneous local coordination environments arising from multimetal incorporation, while properly introducing GQD during coprecipitation ...
Mia Rinawati, Yu‐Ru Liu, Wei‐Hsiang Huang, Kuan‐Yu Lin, Ching‐Ju Ho, Ling‐Yu Chang, Karel Roubik, Ni Luh Wulan Septiani, Ahmad Nuruddin, Wei‐Nien Su, Min‐Hsin Yeh   +10 more
wiley   +1 more source

Giant Electrostriction in Halide Perovskites Revisited With Double‐Modulation Interferometry

Advanced Functional Materials, EarlyView.
A giant electrostrictive effect in lead halide perovskites had been reported previously. This work uses sensitive interferometry to measure the electromechanical response of various halide perovskite samples. The results reveal no intrinsic electrostrictive compression. Instead, the materials expand primarily under an applied electric field as a result
Philipp Ramming, Markus Griesbach, Ralf Moos, Lothar Kador, Anna Köhler   +4 more
wiley   +1 more source

Star–Planet Interactions: A Computational View

Annual Review of Astronomy and Astrophysics
There are several physical processes that mediate the interaction between an exoplanet and its host star, with the four main ones being due to magnetic, particle (stellar outflow), radiative, and tidal interactions. These interactions can be observed at different wavelengths, from X-ray to radio.
openaire   +3 more sources

Star--planet interaction in the Proxima system

Astronomy & Astrophysics
We search for evidence of star--planet magnetic interactions in the nearby Proxima Centauri planetary system using high-quality, high-spectral-resolution optical observations spanning three years. i , Na, i , Fe, i , He, i , and Ca, ii using a differential spectroscopic method and narrowband light curves derived from the spectra.
Osorio, M. R. Zapatero, Béjar, V. J. S., Mascareño, A. Suárez, Rebolo, R., Cristiani, S., Micela, G., Miles-Páez, P. A., Santos, N. C., Pallé, E., Hernández, J. I. González, Damasso, M., Castro-González, A., Martins, C. J. A. P., Pepe, F., Sozzetti, A., Lavie, B., Rodrigues, J.   +16 more
openaire   +2 more sources

Star-planet tidal interaction and the limits of gyrochronology [PDF]

Astronomy & Astrophysics, 2019
Context. Age estimation techniques such as gyrochronology and magnetochronology cannot be applied to stars that have exchanged angular momentum with their close environments. This is especially true for a massive close-in planetary companion (with a period of a few days or less) that could have been strongly impacted by the rotational evolution of the ...
Gallet, F., Delorme, P.
openaire   +4 more sources