Results 61 to 70 of about 2,333,019 (349)

Rotation-Activity-Age Relations for Solar-Type and Cooler Stars

, 2016
The fact that stellar rotation and chromospheric emission are correlated with age was explicitly noted by Wilson (1963) and reinforced by Kraft (1967). Wilson knew that Ca II emission was correlated with surface magnetic field in the Sun. Skumanich (1972)
Basri, Gibor, Basri, Gibor (5201506)
core   +1 more source

3D Printing Innovations in Polymeric Porous and Patterned Architecture

Advanced Functional Materials, EarlyView.
Polymeric foams occupy a unique structural space between dense solids and open networks, where engineered void fraction governs mechanical compliance, thermal resistance, and mass transport. Additive manufacturing now enables precise spatial control over cellular architecture, unlocking designer foam structures across applications spanning crash ...
Dhanush Patil, Sri Vaishnavi Thummalapalli, Clarissa Westover, Arunachalam Ramanathan, M. Taylor Sobzcak, Roumika Patil, Qixuan Xiang, Tiantian Li, Sui Yang, Timothy E. Long, Hongyue Sun, Xianqiao Wang, Yang Liu, Kenan Song   +13 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

THE ASYMMETRIC DRIFT AND THE ROTATION CURVE OF THE GALAXY

Odessa Astronomical Publications, 2014
Asymmetric drift in the solar neighbourhood is studied by the means of the RAVE data. The asymmetric drift correction is applied to the SDSS data to measure the rotation curve of the Milky Way in the extended solar neighbourhood.
O. Golubov
doaj   +1 more source

Automatic detection and tracking of filaments for a solar feature database [PDF]

Annales Geophysicae, 2008
A new method for the automatic detection and tracking of solar filaments is presented. The method addresses the problems facing existing catalogs, such as the one developed recently in the frame of the European Grid of Solar Observations (EGSO ...
J. Aboudarham, I. Scholl, I. Scholl, N. Fuller, M. Fouesneau, M. Galametz, F. Gonon, A. Maire, Y. Leroy   +8 more
doaj   +1 more source

On the solar rotation and activity [PDF]

Astronomische Nachrichten, 2007
AbstractThe interaction between differential rotation and magnetic fields in the solar convection zone was recently modelled by Brun (2004). One consequence of that model is that the Maxwell stresses can oppose the Reynolds stresses, and thus contribute to the transport of the angular momentum towards the solar poles, leading to a reduced differential ...
Brajša, Roman, Wohl, H., Ruždjak, Domagoj, Vršnak, Bojan, Verbanac, Giuliana, Svalgaard, L., Hochedez, J.-F.   +6 more
openaire   +3 more sources

Magnetically controlled stellar differential rotation near the transition from solar to anti-solar profiles

, 2015
VK: Karhunen, J.; ReSoLVEContext. Late-type stars rotate differentially owing to anisotropic turbulence in their outer convection zones. The rotation is called solar-like (SL) when the equator rotates fastest and anti-solar (AS) otherwise.
Pelt, J., M. J. Käpylä, Käpylä, Maarit J., Brandenburg, Axel,, Olspert, N., Karak, Bidya Binay,, B. B. Karak, A. Brandenburg, Kapyla, P. J., J. Pelt, Karak, Bidya B., Brandenburg, Axel, P. J. Käpylä, Käpylä, Petri J., Kapyla, M. J., Karak, B. B., N. Olspert   +16 more
core   +1 more source

Pickering‐Engineered Microparticles for Magnetically Guided Motion and Light‐Triggered Catalysis

Advanced Functional Materials, EarlyView.
Magnetically responsive wax microparticles stabilized by hematite cubes through the Pickering emulsification strategy are developed, showing controlled size, motion, and light‐activated catalytic activity. Annealing under a magnetic field enhances their mobility and steering.
Chiara Ferlito, Ludovico Guercio, Giuseppe Cavallaro, Giuseppe Lazzara, Theodore Hueckel, Lorenzo Lisuzzo, Stefano Sacanna   +6 more
wiley   +1 more source

Equator to Pole Solar Chromospheric Differential Rotation Using Ca-K Features Derived from Kodaikanal Data

The Astrophysical Journal
Differential rotation is one of the basic characteristics of the Sun, and it plays an important role in generating the magnetic fields and its activities.
Hema Kharayat, Jagdev Singh, Muthu Priyal, B. Ravindra   +3 more
doaj   +1 more source

Spectral analysis of auroral geomagnetic activity during various solar cycles between 1960 and 2014 [PDF]

Annales Geophysicae, 2016
In this paper we use wavelets and Lomb–Scargle spectral analysis techniques to investigate the changing pattern of the different harmonics of the 27-day solar rotation period of the AE (auroral electrojet) index during various phases of different ...
P. B. Kotzé
doaj   +1 more source