Results 111 to 120 of about 11,368 (206)

Investigating the Correlation Between Inclination of Coronal Loops and Solar Flare Activity [PDF]

, 2015
The purpose of this research is to investigate changes in the coronal loop structures during the life cycle of a solar flare. Coronal loops are intricate and complicated magnetic features on the solar surface that are the source of large solar flares ...
Mann, John-Paul
core   +1 more source

Spectroscopic Study of Heating Distributions and Mechanisms Using Hinode/EIS

The Astrophysical Journal
Heating distributions along coronal loops are obtained from spectroscopic data with the Hinode/EUV Imaging Spectrometer. The loop half-lengths L _half are in the range of 24–107 Mm for our analysis of 18 loops.
Shun Ishigami, Hirohisa Hara, Takayoshi Oba   +2 more
doaj   +1 more source

Simultaneous Solar Maximum Mission and Very Large Array (VLA) observations of solar active regions [PDF]

Simultaneous observations of solar active regions with the Solar Maximum Mission (SMM) Satellite and the Very Large Array (VLA) have been obtained and analyzed.
Lang, K. R.
core   +1 more source

Understanding the Magnetic Field and Plasma-β along Umbral Fan Loops Traced Using 3 Minute Slow Waves

The Astrophysical Journal Letters
Plasma- β is an important fundamental physical quantity in solar plasma physics, which determines the dominating process in the solar atmosphere, i.e., magnetic or thermodynamic processes. Here, for the first time, we provide variations of magnetic field
Ananya Rawat, Girjesh Gupta, Tom Van Doorsselaere, S. Krishna Prasad, Robertus Erdélyi   +4 more
doaj   +1 more source

On the Connection of Coronal Loop Plasma with the Ambient Magnetic Field

The Astrophysical Journal Letters
Solar coronal loops are magnetically confined plasma structures whose properties are closely linked to the ambient magnetic field. Using 3D magnetohydrodynamic simulations of kink-unstable coronal flux tubes, we investigate how the intensity of the ...
F. Reale, G. Cozzo, P. Pagano, P. Testa
doaj   +1 more source

VLA observations of the coronal plasma [PDF]

VLA observations at 20 cm wavelength specify the brightness temperature and magnetic structure of plasma constrained within coronal loops in solar active regions.
Lang, Kenneth R.
core   +1 more source

Multiple Episodes of Remote Brightenings Driven by a Coronal Extreme-ultraviolet Jet on the Sun

The Astrophysical Journal
Remote brightening (RB) is compact brightening at footpoints of magnetic loops, which are remotely connecting to and confining an eruption in the solar atmosphere.
Chao Zhang, Zhenghua Huang, Hengyuan Wei, Youqian Qi, Mijie Shi, Hui Fu, Xiuhui Zuo, Weixin Liu, Mingzhe Sun, Ming Xiong, Lidong Xia   +10 more
doaj   +1 more source

Spectroscopic Observations of Coronal Rain Formation and Evolution Following an X2 Solar Flare

The Astrophysical Journal
A significant impediment to solving the coronal heating problem is that we currently only observe active region loops in their cooling phase. Previous studies showed that the evolution of cooling loop densities and apex temperatures is insensitive to the
David H. Brooks, Jeffrey W. Reep, Ignacio Ugarte-Urra, John E. Unverferth, Harry P. Warren   +4 more
doaj   +1 more source

Spatiotemporal Low First Ionization Potential Abundance: A Catalyst for Coronal Condensation

The Astrophysical Journal
Radiative losses play a critical role in the cooling of plasmas. When chromospheric plasma is sufficiently heated, it can flow into coronal loops, which subsequently cool down due to radiation. From observations, we infer that this cooling does not occur
Luke Fushimi Benavitz, Jeffrey W. Reep, Lucas A. Tarr, Andy S.H. To   +3 more
doaj   +1 more source

A solar jet-induced perturbation propagating through coronal loops and in-loop electron beam transport as indicated by type II and type N radio bursts

Astronomy & Astrophysics
Aims. Solar type II radio bursts are commonly attributed to coronal shocks driven by coronal mass ejections (CMEs). However, some metric type II bursts have occasionally been reported to occur in the absence of a CME and to be associated with weak solar ...
Cui Yingli, Kong Xiangliang, Li Zhentong, Wang Bing, Duan Yadan, Zhong Ze, Ning Hao, Wu Zhao, Wang Manqing, Liu Yang, Yu Feiyu, Jiang Zelong, Chen Wei, Su Yang, Chen Yao   +14 more
doaj   +1 more source