Results 51 to 60 of about 155,544 (195)

Decay Timescales of Chromospheric Condensations in Solar Flare Footpoints

The Astrophysical Journal
Chromospheric condensations (CCs) are a prominent feature of flare footpoint heating in the solar flare standard model, yet their timescales and velocities are not well understood.
Elizabeth C. Butler, Adam F. Kowalski
doaj   +1 more source

Preflare very long-periodic pulsations observed in Hα emission before the onset of a solar flare [PDF]

, 2020
Very long-periodic pulsations during preflare phases (preflare-VLPs) have been detected in the full-disk solar soft X-Ray (SXR) flux (see Tan et al. 2016).
Dong Li, Song Feng, W. Su, Yu Huang
semanticscholar   +1 more source

Extremely Energetic Extreme-ultraviolet Late Phase of a Pair of C-class Flares Caused by a Noneruptive Sigmoid

The Astrophysical Journal
The extreme-ultraviolet (EUV) late phase (ELP) is the second increase of the irradiance of warm coronal lines during solar flares, and has a crucial impact on the Earth’s ionosphere.
Ya Wang, Sargam M. Mulay, Lyndsay Fletcher   +2 more
doaj   +1 more source

ALEXIS: Recreating the X-Ray Emission from the Full Solar Disk as a Linear Combination of Discrete Regions in the Extreme Ultraviolet and Soft X-Rays

The Astrophysical Journal Supplement Series
Despite a wealth of multiwavelength, spatially resolved, time-domain solar activity data, an accurate and complete temporospatial solar flare census is unavailable, which impedes our understanding of the physics of flare production.
Jorge R. Padial Doble, Kelly Holley-Bockelmann   +1 more
doaj   +1 more source

Spatially Resolved Oscillations of a Flare Looptop X-Ray Source

The Astrophysical Journal Letters
The looptop region in solar flares is a crucial site to understand the physical processes of magnetic reconnection and particle acceleration. Here, we report novel details of a flare looptop X-ray source that is associated with electron acceleration. The
Fanpeng Shi, Alexander Warmuth, Dong Li, Qingmin Zhang, Zongjun Ning, Stefan Purkhart, Song Tan, Frédéric Schuller, Jake A. J. Mitchell   +8 more
doaj   +1 more source

An Improved Lyman‐Alpha Composite

Earth and Space Science, 2019
The hydrogen Lyman‐alpha (Lyman α) line at 121.56 nm is the strongest solar vacuum ultraviolet emission line. Especially because of the impacts on planetary atmospheres, long‐term data sets of Lyman α are important for understanding solar and atmospheric
J. Machol, M. Snow, D. Woodraska, T. Woods, R. Viereck, O. Coddington   +5 more
doaj   +1 more source

Origin of Quasi-periodic Pulsation at the Base of a Kink-unstable Jet

The Astrophysical Journal, 2023
We studied a blowout jet that occurred at the west limb of the Sun on 2014 August 29 using high-resolution imaging/spectroscopic observations provided by the Solar Dynamics Observatory/Atmospheric Imaging Assembly and the Interface Region Imaging ...
Sudheer K. Mishra, Kartika Sangal, Pradeep Kayshap, Petr Jelínek, A. K. Srivastava, S. P. Rajaguru   +5 more
doaj   +1 more source

Mn2+/Yb3+ Codoped CsPbCl3 Perovskite Nanocrystals with Triple‐Wavelength Emission for Luminescent Solar Concentrators

Advancement of science, 2020
Doping metal ions into lead halide perovskite nanocrystals (NCs) has attracted great attention over the past few years due to the emergence of novel properties relevant to optoelectronic applications.
Tong Cai, Junyu Wang, Wenhao Li, Katie Hills‐Kimball, Hanjun Yang, Yasutaka Nagaoka, Yucheng Yuan, R. Zia, Ou Chen   +8 more
semanticscholar   +1 more source

Evidence of Extreme-ultraviolet Resonant Excitation in the Middle Corona during a Solar Flare

The Astrophysical Journal
We present observations of an eruptive solar flare on 2016 January 6 that occurred behind the solar limb from the perspective of the Earth, but was well observed by the Solar-Terrestrial Relations Observatory (or STEREO) and the Solar Extreme Ultraviolet
Daniel B. Seaton, Cooper Downs, Giulio Del Zanna, Matthew J. West, Edward M. B. Thiemann, Amir Caspi, Edward E. DeLuca, Leon Golub, James Paul Mason, Ritesh Patel, Katharine K. Reeves, Yeimy J. Rivera, Sabrina L. Savage   +12 more
doaj   +1 more source

The solar corona above active regions: A comparison of extreme ultraviolet line emission with radio emission [PDF]

Solar Physics, 1967
The observations of extreme ultraviolet (EUV) emission lines of Feix through Fe XVI made by OSO-I have been applied to a study of the solar corona above active regions. Ultraviolet and radio emission are determined for several levels of activity classified according to the type of sunspot group associated with the active region. Both radio emission and
openaire   +2 more sources