Results 21 to 30 of about 232,020 (293)
ARE CORONAL LOOPS ISOTHERMAL OR MULTITHERMAL? [PDF]
The Astrophysical Journal, 2009 Surprisingly few solar coronal loops have been observed simultaneously with TRACE and SOHO/CDS, and even fewer analyses of these loops have been conducted and published. The SOHO Joint Observing Program 146 was designed in part to provide the simultaneous observations required for in-depth temperature analysis of active region loops and determine ...
Schmelz, J. T. +7 more
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Coronal loop oscillations [PDF]
Astronomy & Astrophysics, 2005 The observed coronal loop oscillations and their damping are often theoretically described by the use of a very simple coronal loop model, viz. a straight, longitudinally invariant, axi-symmetric, and pressureless flux tube with a different density inside and outside of the loop.
J. Andries +4 more
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Coronal Loop Interaction [PDF]
Symposium - International Astronomical Union, 1990 High–resolution images of post–flare loop systems in Fe XIV (5303Å) and FeX (6374Å) display transient enhancements at the projected intersections of some loops. The brightness of such enhancements gradually increases to a marked maximum and then fades with a typical lifetime of about thirty minutes.
Raymond N. Smartt, Zhenda Zhang
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Sausage oscillations of coronal loops [PDF]
Astronomy & Astrophysics, 2006 Aims. Analytical theory predicts the existence of trapped global (or fundamental) sausage fast magnetoacoustic modes in thick and dense coronal loops only, with the periods estimated as the ratio of double the loop length and the Alfvén speed outside the loop.
Pascoe, D. J. (David J.) +2 more
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Coronal loop oscillations [PDF]
Astronomy & Astrophysics, 2002 Damped quasi-mode kink oscillations in cylindrical flux tubes are capable of explaining the observed rapid damping of the coronal loop oscillations when the ratio of the inhomogeneity length scale to the radius of the loop is allowed to vary from loop to loop, without the need to invoke anomalously low Reynolds numbers.
M. Goossens +2 more
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MHD simulations of coronal heating [PDF]
, 2015 The problem of heating the solar corona requires the conversion of magnetic energy into thermal energy. Presently, there are two promising mechanisms for heating the solar corona: wave heating and nanoflare heating.
Tam, Kuan V.
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Coronal loops and their modeling [PDF]
Symposium - International Astronomical Union, 1996 We discuss the theory of quasi-static coronal loops, introducing a phase plane representation to study loop solutions independently of specific boundary conditions. Emphasis is put on the effects of loop expansion, heat input and gravitational stratification on the differential emission measure, and on the intrinsic limitations of spectroscopic ...
G.H.J. Van Den Oord, F. Zuccarello
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Effect of structuring on coronal loop oscillations [PDF]
, 2007 In this Thesis the theoretical understanding of oscillations in coronal structures is developed. In particular, coronal loops are modelled as magnetic slabs of plasma.
McEwan, Michael P.
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Statistical evidence for the existence of Alfvénic turbulence in solar coronal loops [PDF]
, 2014 The authors acknowledge support from NASA contracts NNX08BA99G, NNX11AN98G, NNM12AB40P, NNG09FA40C (IRIS), and NNM07AA01C (Hinode). The research leading to these results has also received funding from the European Commission Seventh Framework Programme ...
Bethge, C. +10 more
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Do Coronal Loops Oscillate in Isolation? [PDF]
The Astrophysical Journal, 2021 Abstract Images of the solar corona by extreme-ultraviolet telescopes reveal elegant arches of glowing plasma that trace the corona’s magnetic field. Typically, these loops are preferentially illuminated segments of an arcade of vaulted field lines and such loops are often observed to sway in response to nearby solar flares.
Bradley W. Hindman, Rekha Jain
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