Results 21 to 30 of about 2,960 (140)

A Multicomponent Magnetic Proxy for Solar Activity

Space Weather, Volume 19, Issue 12, December 2021., 2021
Abstract We present a new, multicomponent magnetic proxy for solar activity derived from full disk magnetograms that can be used in the specification and forecasting of the Sun’s radiative output. To compute this proxy we project Carrington maps, such as the synchronic Carrington maps computed with the Advective Flux Transport (AFT) surface flux ...
Harry P. Warren, Linton E. Floyd, Lisa A. Upton   +2 more
wiley   +1 more source

A Multi‐Purpose Heliophysics L4 Mission

Space Weather, Volume 19, Issue 9, September 2021., 2021
Abstract The Earth‐Sun Lagrangian point 4 is a meta‐stable location at 1 AU from the Sun, 60° ahead of Earth's orbit. It has an uninterrupted view of the solar photosphere centered on W60, the Earth's nominal magnetic field connection to the Sun. Such a mission on its own would serve as a solar remote sensing observatory that would oversee the entire ...
A. Posner, C. N. Arge, J. Staub, O. C. StCyr, D. Folta, S. K. Solanki, R. D. T. Strauss, F. Effenberger, A. Gandorfer, B. Heber, C. J. Henney, J. Hirzberger, S. I. Jones, P. Kühl, O. Malandraki, V. J. Sterken   +15 more
wiley   +1 more source

Solar Filament Eruptions in H α Doppler Velocity

The Astrophysical Journal, 2023
We use observations taken with a novel solar telescope spectroheliograph to investigate the association between the early filament rise and coronal mass ejections (CMEs).
I. A. Berezin, A. G. Tlatov, A. A. Pevtsov   +2 more
doaj   +1 more source

Linguistic, Historical and Poetical Stylistic Aspects of Translating of The Song of «Igor's Campaign». The Subjects of the Authorship and the Time of Creation

Язык и текст, 2017
The article presents some peculiarities of the new translation of The Song of Igor's Campaign made by the author of the present article as well as the translations by the most famous Russian authors of different times.
G.D. Pevtsov
doaj   +1 more source

Solar Wind Modeling with the Alfvén Wave Solar atmosphere Model Driven by HMI-based Near-real-time Maps by the National Solar Observatory

The Astrophysical Journal, 2023
We explore the performance of the Alfvén Wave Solar atmosphere Model with near-real-time (NRT) synoptic maps of the photospheric vector magnetic field.
Nishtha Sachdeva, Ward B. Manchester IV, Igor Sokolov, Zhenguang Huang, Alexander Pevtsov, Luca Bertello, Alexei A. Pevtsov, Gabor Toth, Bart van der Holst, Carl J. Henney   +9 more
doaj   +1 more source

Long-term studies of photospheric magnetic fields on the Sun

Journal of Space Weather and Space Climate, 2021
We briefly review the history of observations of magnetic fields on the Sun, and describe early magnetograps for full disk measurements. Changes in instruments and detectors, the cohort of observers, the knowledge base etc may result in non-uniformity of
Pevtsov Alexei A., Bertello Luca, Nagovitsyn Yury A., Tlatov Andrey G., Pipin Valery V.   +4 more
doaj   +1 more source

New dynamo pattern revealed by solar helical magnetic fields [PDF]

, 2009
Previously unobservable mirror asymmetry of the solar magnetic field -- a key ingredient of the dynamo mechanism which is believed to drive the 11-year activity cycle -- has now been measured.
A. Pevtsov, Abramenko, Abramenko, Bao, Bao, Brandenburg, Choudhuri, D. D. Sokoloff, Gao, Hagino, Hagino, Haiqing Xu, Hale, Hongqi Zhang, K. Kuzanyan, Kleeorin, Kuzanyan, Otmianowska-Mazur, Parker, Pevtsov, Pevtsov, Pevtsov, Pevtsov, Pevtsov, Seehafer, Seehafer, Sokoloff, Sokoloff, Sokoloff, Su, T. Sakurai, Tanaka, Xu, Yeates, Yu Gao, Zhang, Zhang, Zhang, Zhang   +38 more
core   +1 more source

Intense Anti‐Stokes Emission from Erbium Ions in Gallium Lanthanum Sulphide–Oxide Glass in the Visible Spectral Range

physica status solidi (a), Volume 217, Issue 24, December 2020., 2020
Photoluminescence spectra is investigated in erbium‐doped GaLaS(O) glass under 808 nm excitation. Herein, the visual impression and green coloration of photoluminescence (PL) are shown. The length of the cylinder is 10 mm and the diameter is close to 3 mm.
Michail M. Voronov, Alexander B. Pevtsov, Alexander P. Skvortsov, Cyril Koughia, Chris Craig, Dan W. Hewak, Safa Kasap, Valery G. Golubev   +7 more
wiley   +1 more source

The reversal of the Sun’s magnetic field in cycle 24

Solar-Terrestrial Physics, 2016
Analysis of synoptic data from the Vector Spectromagnetograph (VSM) of the Synoptic Optical Long-term Investigations of the Sun (SOLIS) and the NASA/NSO Spectromagnetograph (SPM) at the NSO/Kitt Peak Vacuum Telescope facility shows that the reversals of ...
Mordvinov A.V., Pevtsov A.A., Bertello L., Petrie G.J.D.   +3 more
doaj   +1 more source

Data Assimilative Optimization of WSA Source Surface and Interface Radii using Particle Filtering

Space Weather, Volume 18, Issue 5, May 2020., 2020
Abstract The Wang‐Sheeley‐Arge (WSA) model estimates solar wind speed and interplanetary magnetic field polarity in the inner heliosphere using global photospheric magnetic field maps. WSA employs the Potential Field Source Surface (PFSS) and Schatten Current Sheet (SCS) models to determine the Sun's global coronal magnetic field.
Grant David Meadors, Shaela I. Jones, Kyle S. Hickmann, Charles N. Arge, Humberto C. Godinez‐Vasquez, Carl J. Henney   +5 more
wiley   +1 more source