Zobrazeno 51 - 60
of 219
pro vyhledávání: '"Klimchuk, James"'
This paper develops the zero-dimensional (0D) hydrodynamic coronal loop model "Enthalpy-based Thermal Evolution of Loops" (EBTEL) proposed by Klimchuk et al (2008), which studies the plasma response to evolving coronal heating, especially impulsive h
Externí odkaz:
http://arxiv.org/abs/1204.5960
A well known behavior of EUV light curves of discrete coronal loops is that the peak intensities of cooler channels or spectral lines are reached at progressively later times than hotter channels. This time lag is understood to be the result of hot c
Externí odkaz:
http://arxiv.org/abs/1202.4001
Using data from the Extreme-ultraviolet Imaging Spectrometer aboard Hinode, we have studied the coronal plasma in the core of two active regions. Concentrating on the area between opposite polarity moss, we found emission measure distributions having
Externí odkaz:
http://arxiv.org/abs/1107.4480
It is largely agreed that many coronal loops---those observed at a temperature of about 1 MK--- are bundles of unresolved strands that are heated by storms of impulsive nanoflares. The nature of coronal heating in hotter loops and in the very importa
Externí odkaz:
http://arxiv.org/abs/1106.4196
It is generally agreed that small impulsive energy bursts called nanoflares are responsible for at least some of the Sun's hot corona, but whether they are the explanation for most of the multi-million degree plasma has been a matter of ongoing debat
Externí odkaz:
http://arxiv.org/abs/1105.2506
Using a full spectral scan of an active region from the Extreme-Ultraviolet Imaging Spectrometer (EIS) we have obtained Emission Measure EM$(T)$ distributions in two different moss regions within the same active region. We have compared these with th
Externí odkaz:
http://arxiv.org/abs/1009.0663
Autor:
Klimchuk, James A.
It was once thought that all coronal loops are in static equilibrium, but observational and modeling developments over the past decade have shown that this is clearly not the case. It is now established that warm (~1 MK) loops observed in the EUV are
Externí odkaz:
http://arxiv.org/abs/0904.1391
Publikováno v:
Astrophys.J.698:756-765,2009
Nanoflares, short and intense heat pulses within spatially unresolved magnetic strands, are now considered a leading candidate to solve the coronal heating problem. However, the frequent occurrence of nanoflares requires that flare-hot plasma be pres
Externí odkaz:
http://arxiv.org/abs/0904.0878
This paper investigates the temporal evolution of temperature, emission measure, energy loss and velocity in a C-class solar flare from both an observational and theoretical perspective. The properties of the flare were derived by following the syste
Externí odkaz:
http://arxiv.org/abs/0812.0311
Autor:
Klimchuk, James A.
Publikováno v:
Klimchuk, J. A. 2006, Solar Phys., 234, 41
This article assesses the current state of understanding of coronal heating, outlines the key elements of a comprehensive strategy for solving the problem, and warns of obstacles that must be overcome along the way.
Comment: Accepted by Solar Ph
Comment: Accepted by Solar Ph
Externí odkaz:
http://arxiv.org/abs/astro-ph/0511841