Results 91 to 100 of about 37,593 (223)

PHOTOSPHERIC EMISSION FROM STRATIFIED JETS

The Astrophysical Journal, 2013
18 pages, 14 figures, accepted for publication in ...
Ito, Hirotaka, Nagataki, Shigehiro, Ono, Masaomi, Lee, Shiu-Hang, Mao, Jirong, Yamada, Shoichi, Pe'er, Asaf, Mizuta, Akira, Harikae, Seiji   +8 more
openaire   +2 more sources

Transient rotation of photospheric vector magnetic fields associated with a solar flare

Nature Communications, 2018
The violent solar eruptions known as flares are caused by magnetic reconnection. Here, the authors identify a sudden 12°–20° counter clockwise rotation of vector magnetic fields in photosphere, associated with the emissions of moving flare ribbons.
Yan Xu, Wenda Cao, Kwangsu Ahn, Ju Jing, Chang Liu, Jongchul Chae, Nengyi Huang, Na Deng, Dale E. Gary, Haimin Wang   +9 more
doaj   +1 more source

Diffusion in the chromosphere and the composition of the solar corona and energetic particles [PDF]

Composition observations, in the solar photosphere, and in the upper transition region (TR) and corona imply a change of composition of the solar atmosphere somewhere between the photosphere and the upper TR.
Meyer, J. P., Vauclair, S.
core   +1 more source

Magnetic fields of an active region filament from full Stokes analysis of Si I 1082.7 nm and He I 1083.0 nm

, 2012
Vector magnetic fields of an active region filament in the photosphere and upper chromosphere are obtained from spectro-polarimetric observations recorded with the Tenerife Infrared Polarimeter (TIP II) at the German Vacuum Tower Telescope (VTT).
A. Lagg, Asensio Ramos, Canou, Centeno, Collados, Georgoulis, Guo, Harvey, Kurucz, Lagg, Leroy, Lin, Lites, Lites, López Ariste, Merenda, Okamoto, Paletou, Rüedi, S. Solanki, Sasso, Socas-Navarro, Solanki, Trujillo Bueno, Wang, Y. Liu, Z. Xu   +26 more
core   +1 more source

TURBULENT DIFFUSION IN THE PHOTOSPHERE AS DERIVED FROM PHOTOSPHERIC BRIGHT POINT MOTION

The Astrophysical Journal, 2011
On the basis of observations of solar granulation obtained with the New Solar Telescope (NST) of Big Bear Solar Observatory, we explored proper motion of bright points (BPs) in a quiet sun area, a coronal hole, and an active region plage. We automatically detected and traced bright points (BPs) and derived their mean-squared displacements as a function
ABRAMENKO V. I, CARBONE, Vincenzo, YURCHYSHYN V, GOODE P. R, STEIN R. F, LEPRETI, Fabio, CAPPARELLI V, VECCHIO A.   +7 more
openaire   +3 more sources

Observational Evidence of Shallow Origins for the Magnetic Fields of Solar Cycles

Frontiers in Astronomy and Space Sciences, 2018
Observational evidence for the origin of active region magnetic fields has been sought from published information on extended solar cycles, statistical distributions of active regions and ephemeral regions, helioseismology results, positional ...
Sara F. Martin
doaj   +1 more source

Multiwavelength Emission of Gamma-Ray Burst Prompt Phase. II. Spectral Polarimetry

The Astrophysical Journal
Polarization spectra were predicted within the photosphere model. To seek more clues to distinguish between the models, both the time-resolved and time-integrated polarization spectra from optical band to MeV gamma-rays of the magnetic reconnection model
Jia-Sheng Li, Mi-Xiang Lan
doaj   +1 more source

Study of the 3D Coronal Magnetic Field of Active Region 11117 Around the Time of a Confined Flare Using a Data-Driven CESE--MHD Model

, 2012
We apply a data-driven MHD model to investigate the three-dimensional (3D) magnetic field of NOAA active region (AR) 11117 around the time of a C-class confined flare occurred on 2010 October 25. The MHD model, based on the spacetime conservation-element
Abbett, Archontis, Aschwanden, Bungey, Canou, Chae, Chaowei Jiang, Demoulin, Demoulin, DeRosa, Fan, Fan, Fang, Feng, Guo, Jiang, Jiang, Jing, Lin, Longcope, Mackay, Mandrini, Priest, Priest, Qiang Hu, Régnier, S. T. Wu, Schrijver, Seehafer, Shibata, Solanki, Sun, Sun, Titov, Titov, Wang, Wang, Welsch, Wheatland, Wu, Xueshang Feng   +40 more
core   +1 more source

Multiwavelength Emission of the Gamma-Ray Burst Prompt Phase. I. Time-resolved and Time-integrated Polarizations

The Astrophysical Journal
The time-integrated polarization degree (PD) in the prompt optical band of a gamma-ray burst (GRB) was predicted to be less than 20%, while the time-resolved one can reach as high as 75% in the photosphere model.
Jia-Sheng Li, Mi-Xiang Lan, Hao-Bing Wang   +2 more
doaj   +1 more source

Deconstructing Photospheric Spectral Lines in Solar and Stellar Flares

The Astrophysical Journal
During solar flares, spectral lines formed in the photosphere have been shown to exhibit changes to their profiles despite the challenges of energy transfer to these depths.
Aaron J. Monson, Mihalis Mathioudakis, Adam F. Kowalski   +2 more
doaj   +1 more source