Results 31 to 40 of about 95,125 (291)

Ray Tracing of MHD Rossby Waves in the Solar Tachocline: Meridional Propagation and Implications for the Solar Magnetic Activity

Frontiers in Astronomy and Space Sciences, 2022
Rossby waves have been recently recognised for their role in the large-scale spatio-temporal organisation of the solar magnetic activity. Here, we study the propagation of magnetohydrodynamic Rossby waves in a thin layer, representing the solar ...
André S. W. Teruya, Breno Raphaldini, Carlos F. M. Raupp   +2 more
doaj   +1 more source

Solar differential rotation and meridional flow: The role of a subadiabatic tachocline for the Taylor-Proudman balance [PDF]

, 2005
We present a simple model for the solar differential rotation and meridional circulation based on a mean field parameterization of the Reynolds stresses that drive the differential rotation.
Kitchatinov L. L., Kitchatinov L. L., M. Rempel, Pidatella R. M., Skaley D., Spruit H., Stix M.   +6 more
core   +2 more sources

The Sun's Preferred Longitudes and the Coupling of Magnetic Dynamo Modes

, 2003
Observations show that solar activity is distributed non-axisymmetrically, concentrating at "preferred longitudes". This indicates the important role of non-axisymmetric magnetic fields in the origin of solar activity.
Alberto Bigazzi, Alexander Ruzmaikin, Bullard E. C., Choudhuri A. R., Ferriz-Mas A., Ivanova T. S., Moss D., Roberts P. H., Ruediger G., Ruzmaikin A., Stix M., Stix M., Tuominen J.   +12 more
core   +1 more source

The impact of differential rotation on the stochastic excitation of acoustic modes in solar-like pulsators

Astronomy & Astrophysics
Context. Acoustic modes are excited by turbulent convection in the outer convective envelope of solar-like stars. Observational results from asteroseismic studies have shown that 44% of solar-like stars do not present detectable stochastically excited ...
Biscarrat G., Bessila L., Mathis S.
doaj   +1 more source

The 2D dynamics of radiative zones of low-mass stars

, 2017
In the context of secular evolution, we describe the dynamics of the radiative core of low-mass stars to understand the internal transport of angular momentum in such stars which results in a solid rotation in the Sun from 0.7R_sun to 0.2R_sun and a weak
Hypolite, D., Mathis, S., Rieutord, M.
core   +3 more sources

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

Dual‐Mode Film Based on Highly Scattering Nanofibers and Upcycled Chips‐Bags for Year‐Round Thermal Management

Advanced Functional Materials, EarlyView.
Intelligent radiative cooling devices, adaptable to various weather conditions, have the potential for year‐round energy savings. This study introduces a sustainable dual‐mode film made from polycaprolactone nanofibers and upcycled chip bags for effective thermal management.
Qimeng Song, Stefan Rettinger, Chengzhang Xu, Ulrich Mansfeld, Markus Retsch   +4 more
wiley   +1 more source

Solar Rotation and Activity for Cycle 24 from SDO/AIA Observations

The Astrophysical Journal
Differential rotation plays a crucial role in the dynamics of the Sun. We study the solar rotation and its correlation with solar activity by applying a modified machine learning algorithm to identify and track coronal bright points (CBPs) from the Solar
Zahra Shokri, Nasibe Alipour, Hossein Safari   +2 more
doaj   +1 more source

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

MnI‐Functionalized Covalent Organic Framework as Efficient Electrocatalyst for CO2 Reduction in a Catholyte‐Free Zero‐Gap Electrolyzer

Advanced Functional Materials, EarlyView.
This work demonstrates the successful integration of a phenanthroline‐based 2D COF with MnI catalytic sites into a catholyte‐free membrane‐electrode‐assembly cell for CO2 electroreduction. The crystalline COF actively suppresses Mn⁰–Mn⁰ dimerization, achieving a turnover frequency of 617 h⁻¹ at 2.8 V (full‐cell potential), and enabling stable operation.
Laura Spies, Marcos Eduardo G. Carmo, Gonçalves J. Marrenjo, Stephan Reuther, Patrick Ganswindt, Antonio Otavio T. Patrocinio, Thomas Bein, Osmando F. Lopes, Jenny Schneider   +8 more
wiley   +1 more source