Results 61 to 70 of about 243,256 (287)

Solar surface rotation: N-S asymmetry and recent speed-up

, 2015
Context. The relation between solar surface rotation and sunspot activity still remains open. Sunspot activity has dramatically reduced in solar cycle 24 and several solar activity indices and flux measurements experienced unprecedentedly low levels ...
Mursula, K., Usoskin, I., Zhang, L.
core   +1 more source

Circular‐Polarization‐Sensitive Organic Photodetectors with a Chiral Nanopatterned Electrode Inverse‐Designed by Genetic Algorithm

Advanced Functional Materials, EarlyView.
A chiral photodetector capable of selectively distinguishing left‐ and right‐handed circularly polarized light is experimentally demonstrated. The device, which features a nanopatterned electrode inverse‐designed by a genetic algorithm within a metal–dielectric–metal nanocavity that incorporates a vacuum‐deposited small‐molecule multilayer, exhibits ...
Kyung Ryoul Park, Jewoong Lee, In‐Suk Choi, Changsoon Kim   +3 more
wiley   +1 more source

Dynamic 3D Simulation of Surface Charging on Rotating Asteroids

The Astrophysical Journal
The surface-charging phenomenon of asteroids, mainly resulting from solar wind plasma and solar radiation, has been extensively studied. However, the influence of the asteroid’s rotation on surface charging is not yet fully understood.
Ronghui Quan, Zhiying Song, Zhigui Liu
doaj   +1 more source

Rotation profiles of solar-like stars with magnetic fields

, 2008
The aim of this work is to investigate rotation profile of solar-like stars with magnetic fields. A diffusion coefficient of magnetic angular momentum transport is deduced.
Andronov N, Baglin A, Barnes G, Basu S, Berthomieu G, Charbonneau P, Fan Y, Gough D O, Gough D O, Goupil M J, Huang R Q, Kippenhaln R, Komm R, Matt S, Meynet G, Pitts E, Rogers F J, Roxburgh I W, Schou J, Shao-Lan Bi, Spruit H C, Walker G A H, Wu-Ming Yang, Zahn J-P   +23 more
core   +1 more source

Rotation and lithium abundance of solar-analog stars. Theoretical analysis of observations [PDF]

, 2010
Rotational velocity, lithium abundance, and the mass depth of the outer convective zone are key parameters in the study of the processes at work in the stellar interior, in particular when examining the poorly understood processes operating in the ...
Alexander, Angulo, Bahcall, Bouvier, Böhm-Vitense, Cayrel de Strobel, García López, Girardi, Gonzalez, Grevesse, Holmberg, Iglesias, J. D. do Nascimento, J. R. De Medeiros, J. S. da Costa, Jones, King, Lambert, Meléndez, Meléndez, Messina, Nascimento, Nascimento, Nordström, Paquette, Pasquini, Pasquini, Porto de Mello, Richard, Richard, Rogers, Soderblom, Spite, Takeda, Valenti   +34 more
core   +1 more source

Solar Rotation Stereoscopy in Microwaves

The Astrophysical Journal, 1995
We present here the first stereoscopic altitude measurements of active region sources observed at microwave frequencies (10-14 GHz). The active region NOAA 7128 was observed with the Owens Valley Radio Observatory (OVRO) on 1992 April 13, 14, 15, and 16 as it passed through the central meridian.
Gary, DE, Aschwanden, MJ, Lim, J, Klimchuk, JA   +3 more
openaire   +2 more sources

From Single Atoms to Nanoparticles: Pathways Toward Efficient and Durable Pt/TiO2 Photocatalysts

Advanced Functional Materials, EarlyView.
Platinum single atoms on TiO2 nanosheets evolve into clusters and nanoparticles under ethanol photoreforming and thermal treatments. By controlling deposition and post‐treatments, particle size and location on specific facets are modulated. The study reveals how stability pathways determine efficiency, guiding the design of more durable photocatalysts.
Juan José Delgado, Enqi Bu, Yaning Han, Carlos López‐Cartes, Mónica Calatayud, Huiyan Pan, Xiaowei Chen   +6 more
wiley   +1 more source

Study on the Temporal Evolution of the Radial Differential Rotation of Solar Corona Using Radio Emissions

The Astrophysical Journal
The daily measurements of the disk-integrated solar radio flux, observed by the Radio Solar Telescope Network, at 245, 410, 610, 1415, 2695, 4995, and 8800 MHz during the time interval of 1989 January 1 to 2019 December 17, are used to investigate the ...
N. B. Xiang, X. H. Zhao, L. H. Deng, F. Y. Li, Y. J. Wang, X. W. Tan   +5 more
doaj   +1 more source

Detection of differential rotation in psi Cap with profile analysis

, 2001
We report detection of differential rotation on the F5 dwarf psi Cap using line profile analysis. The Fourier transform of both FeI lambda 5775 and SiI lambda 5772 are used to obtain a projected rotational velocity of v sini = (42+-1)km/s.
A. Reiners, Barnes, Baschek, Belvedere, Blackwell, Bruning, Bruning, Donati, Dravins, Gray, Gray, Groot, Hempelmann, J. H. M. M. Schmitt, Kitchatinov, Kupka, Kurucz, Lachaume, M. Kürster, Messina, Townsend   +20 more
core   +2 more sources

Ultrastable Photoactive Halide Perovskite Nanocrystal‐Sensitized SnO2 Nanorods for Room‐Temperature NO2 Detection

Advanced Functional Materials, EarlyView.
ABSTRACT Metal oxide (MOx)‐based NO2 gas sensors typically require high temperatures or ultraviolet light, limiting their practical use. To enable visible‐light activation at room temperature, efficient and stable photosensitizers should be integrated with nanostructured MOx hosts.
Yeonji Yuk, Dokyum Kim, Jun‐Cheol Park, Yoonsung Jung, Inhyeok Oh, Donghyeon Lee, Yejoon Kim, Ji‐Eun Yeo, Young Min Song, Chang‐Lyoul Lee, Sanghan Lee   +10 more
wiley   +1 more source