Results 81 to 90 of about 22,488,979 (349)

Planetary system disruption by Galactic perturbations to wide binary stars [PDF]

Nature, 2013
Nearly half the exoplanets found within binary star systems reside in very wide binaries with average stellar separations greater than 1,000 astronomical units (one astronomical unit (au) being the Earth–Sun distance), yet the influence of such distant ...
N. Kaib, S. Raymond, M. Duncan
semanticscholar   +1 more source

Copper‐based Materials for Photo and Electrocatalytic Process: Advancing Renewable Energy and Environmental Applications

Advanced Functional Materials, EarlyView.
Cu‐based catalysts as a cornerstone in advancing sustainable energy technologies are fully reviewed in this manuscript, highlighting their potential in photo‐ and electrocatalysis. It includes metallic copper, copper oxides, copper sulfides, copper halide perovskites, copper‐based metal–organic frameworks (MOFs), and covalent organic frameworks (COFs),
Jéssica C. de Almeida, Yanjie Wang, Thais A. Rodrigues, Paulo H. H. Nunes, Vagner R. de Mendonça, Paulo H. E. Falsetti, Leticia V. Savazi, Tao He, Alexandra V. Bardakova, Aida V. Rudakova, Jie Tian, Alexei V. Emeline, Osmando F. Lopes, Antonio Otavio T. Patrocínio, Jia Hong Pan, Caue Ribeiro, Detlef W. Bahnemann   +16 more
wiley   +1 more source

No variations in transit times for Qatar-1 b

, 2015
The transiting hot Jupiter planet Qatar-1 b was presented to exhibit variations in transit times that could be of perturbative nature. A hot Jupiter with a planetary companion on a nearby orbit would constitute an unprecedented planetary configuration ...
Aceituno, F. J., Dimitrov, D., Errman, R., Fernández, M., Gilbert, H., Kitze, M., Maciejewski, G., Neuhäuser, R., Ohlert, J., Pannicke, A., Puchalski, D., Raetz, St., Schmidt, J. -G., Seeliger, M.   +13 more
core   +1 more source

Parallel Finite Element Algorithm for Large Elastic Deformations: Program Development and Validation

Eng
A comprehensive understanding of large elastic deformation, characterized by its nonlinear strain and stress properties, is vital for examining tectonic deformation across geological timescales.
Yuhang Chen, Caibo Hu, Huai Zhang
doaj   +1 more source

Theoretical models of planetary system formation: mass vs. semi-major axis [PDF]

, 2013
Context. Planet formation models have been developed during the past years to try to reproduce what has been observed of both the solar system and the extrasolar planets.
Y. Alibert, F. Carrón, A. Fortier, S. Pfyffer, W. Benz, C. Mordasini, D. Swoboda   +6 more
semanticscholar   +1 more source

Enhancing Direct Solar Water Splitting via ALD of Multifunctional TiO2/Pt Nanoparticle Coatings With Engineered Interfaces to GaAs/GaInP Tandem Cells

Advanced Functional Materials, EarlyView.
Multifunctional atomic layer deposited coatings and interface treatments enhance direct solar water splitting on GaAs/GaInP tandem cells. Optimized TiO2/Pt nanoparticle bilayers ensure durability and catalytic efficiency with minimal optical losses, while H2 plasma pretreatments maximize photovoltage and interfacial charge extraction.
Tim F. Rieth, Verena Streibel, Oliver Bienek, Sergej Levashov, Johannes Dittloff, Kristof Möller, Johanna Eichhorn, Matthias M. May, Ian D. Sharp   +8 more
wiley   +1 more source

On the HU Aquarii planetary system hypothesis

, 2012
In this work, we investigate the eclipse timing of the polar binary HU Aquarii that has been observed for almost two decades. Recently, Qian et al. attributed large (O-C) deviations between the eclipse ephemeris and observations to a compact system of ...
Beuermann, Klaus, Burwitz, Vadim, Gauza, Bartosz, Gozdziewski, Krzysztof, Haghighipour, Nader, Hinse, Tobias C., Kanbach, Gottfried, Maciejewski, Andrzej J., Nasiroglu, Ilham, Rau, Arne, Schwarz, Robert, Schwope, Axel D., Slonina, Mariusz, Slowikowska, Aga   +13 more
core   +1 more source

Refined stellar, orbital and planetary parameters of the eccentric HAT-P-2 planetary system [PDF]

, 2009
We present refined parameters for the extrasolar planetary system HAT-P-2 (also known as HD 147506), based on new radial velocity and photometric data. HAT-P-2b is a transiting extrasolar planet that exhibits an eccentric orbit.
Andrew W. Howard, András Pál, Bakos, Bakos, Bakos, Bakos, Bakos, Baraffe, Baraffe, Barbieri, Barnes, Borucki, Brigitta Sipőcz, Charbonneau, Claret, Claret, D'Angelo, David W. Latham, Debra A. Fischer, Demarque, Droege, Fabrycky, Ford, Fortney, Geoffrey W. Marcy, Gilbert A. Esquerdo, Gillon, Gregory W. Henry, Guillermo Torres, Gáspár Á. Bakos, Henry, Hébrard, John A. Johnson, Johns-Krull, Johnson, Kopal, Loeb, Loeillet, Mandel, Naef, Ochsenbein, Perryman, Press, Pál, Pál, Pál, Pál, Pál, Pál, R. Paul Butler, Robert W. Noyes, Shporer, Skrutskie, Sozzetti, Takeda, Valenti, Valenti, van Leeuwen, van Leeuwen, Vogt, Winn, Winn, Winn, Winn, Yi   +64 more
core   +3 more sources

Simulation of Contact Force of Fault Planetary Gear System based on Virtual Prototype Technology

Jixie chuandong, 2015
In order to obtain the changing pattern of contact force of fault planetary gear system,a dynamics model of fault planetary gear system is established and the computation method for contact force of gear meshing based on Hertz theory is also introduced ...
Xiang Ling, Chen Tao, Hu Silei
doaj  

A detailed dynamical investigation of the proposed QS Virginis planetary system [PDF]

, 2013
In recent years, a number of planetary systems have been proposed to orbit-evolved binary star systems. The presence of planets is invoked to explain observed variations in the timing of mutual eclipses between the primary and secondary components of the
J. Horner, R. Wittenmyer, T. Hinse, J. Marshall, A. Mustill, C. Tinney   +5 more
semanticscholar   +1 more source