Results 91 to 100 of about 155,544 (195)

Quasiperiodic Oscillations of Flare Loops and Slipping Motion of Ribbon Substructures during a C-class Flare

The Astrophysical Journal
Quasiperiodic oscillations in solar-flaring emission have been observed over the past few decades. To date, the underpinning processes resulting in the quasiperiodic oscillations remain unknown.
Yining Zhang, Ting Li, Jing Ye
doaj   +1 more source

Correlation Heights of the Sources of Solar Ultraviolet Emission Lines in a Quiet-Sun Region

, 2005
C. Tu, Cheng Zhou, E. Marsch, K. Wilhelm, Liang Zhao, L. Xia, Jingxiu Wang   +6 more
semanticscholar   +1 more source

Quasiperiodic Super-Alfvénic Slippage along Flare Ribbons Observed by the Interface Region Imaging Spectrograph

The Astrophysical Journal Letters
The apparent slipping motion of flare loops is regarded as a key feature of the 3D magnetic reconnection in the solar flares. The slippage with a super-Alfvénic speed could be defined as slipping–running reconnection, while the slippage with a sub ...
Yining Zhang, Ting Li, Yijun Hou, Xuchun Duan, Zheng Sun, Guiping Zhou   +5 more
doaj   +1 more source

Quiet-Sun Connection between Intensity, Doppler Shift, and Line Broadening in Solar Ultraviolet Emission Lines

, 1995
N. Brynildsen, O. Kjeldseth-moe, P. Maltby   +2 more
semanticscholar   +1 more source

Solar Variability in the Mg ii h and k Lines

The Astrophysical Journal
Solar irradiance and its variations in the ultraviolet (UV) control the photochemistry in Earth's atmosphere and influence Earth's climate. The variability in the Mg ii h and k core-to-wing ratio, also known as the Mg ii index, is highly correlated with ...
K. Sowmya, M. Snow, A. I. Shapiro, N. A. Krivova, T. Chatzistergos, S. K. Solanki   +5 more
doaj   +1 more source

Understanding the Variability of Helium Abundance in the Solar Corona Using Three-fluid Modeling and Ultraviolet Observations

The Astrophysical Journal Letters
The variability of helium abundance in the solar corona and the solar wind is an important signature of solar activity, solar cycle, and solar wind sources, as well as coronal heating processes.
Leon Ofman, Yogesh, Silvio Giordano
doaj   +1 more source

Observations of Microwave Emission from Solar Jets and Comparison with Magnetohydrodynamic Simulations

The Astrophysical Journal
We computed the thermal microwave emission from a 3D magnetohydrodynamic (MHD) simulation and compared it with observations of solar jets. The simulation treats the emergence of magnetic flux into the solar atmosphere and its interaction with a low ...
Costas E. Alissandrakis, Vasilis Archontis, Kostas Moraitis   +2 more
doaj   +1 more source

Solar Emission Lines in the Extreme Ultraviolet.

The Astrophysical Journal, 1959
T. Violett, William A. Rense
openaire   +1 more source

Eruption-Related Ultraviolet Irradiance Enhancements Associated with Flares. [PDF]

Sol Phys
Majury L, Dominique M, Milligan R, Talpeanu DC, Dammasch I, Berghmans D.   +5 more
europepmc   +1 more source

PROPERTIES OF ULTRAVIOLET EMISSION AT DEVELOPMENT OF SOLAR FLARES

PHYSICO-MATHEMATICAL SERIES, 2019
null G.S. Minasyants, null T.M. Minasyants, null V.D. Vdovichenko, null A. G. Bibosinov   +3 more
openaire   +1 more source