Results 111 to 120 of about 5,669 (225)
Preferential Appearance of Hα Moreton Waves along Photospheric Magnetic Network Boundaries
The Astrophysical Journal LettersMoreton waves are rare chromospheric signatures of large-scale coronal disturbances, often associated with big flares and coronal mass ejections. Using high-cadence, full-disk H α spectroscopic observations from Chinese H α Solar Explorer, together with ...
C. H. Zhai +3 more
doaj +1 more source
The Non-Magnetic Solar Chromosphere
, 2007 . We summarize recent results from self-consistent non-LTE radiation hydrodynamicssimulations of the propagation of acoustic waves through the non-magnetic solar chromosphere. References to more detailed write-ups of the work are given.
Mats Carlsson, Robert F. Stein
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Effect of Magnetic Diffusion in the Chromosphere on the Solar Wind
The Astrophysical JournalWe investigate nonideal magnetohydrodynamical (MHD) effects in the chromosphere on the solar wind by performing MHD simulations for Alfvén-wave-driven winds, explicitly including ohmic and ambipolar diffusion.
Masato Matsuoka +3 more
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A single frequency approach to nonequilibrium modeling of the chromosphere
Astronomy & AstrophysicsContext. The solar chromosphere is a region where radiation plays a critical role in energy transfer and interacts strongly with the plasma. In this layer, strong spectral lines, such as the Lyman lines, contribute significantly to radiative energy ...
Ruan W. +3 more
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The Bright Rim Prominences according to 2.5D Radiative Transfer
The Astrophysical Journal LettersSolar prominences observed close to the limb commonly include a bright feature that, from the perspective of the observer, runs along the interface between itself and the underlying chromosphere. Despite several idealized models being proposed to explain
Jack M. Jenkins +4 more
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Analysis of OSO data to determine the structure and energy balance of the solar chromosphere [PDF]
, 1975 A detailed reexamination of the temperature-density structure of the photosphere and low chromosphere shows that the middle and upper chromosphere, which directly emits most of the OSO spectrum, is sensitive to conditions in this underlying region of the
Avrett, E. H., Kalkofen, W.
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Observations of the Formation and Disappearance of a Funnel Prominence
The Astrophysical Journal LettersWe present an observational study of the formation and disappearance of a funnel prominence. Before the funnel prominence formed, cool materials from the top of a preexisting polar crown prominence flowed along saddle-shaped coronal loops to their base ...
Bo Yang +3 more
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Dynamics of the Quiet Solar Chromosphere [PDF]
, 1999 The solar chromosphere has never been static although it was often modeled so.Even the quiet-sun internetwork chromosphere has become thoroughly dynamic with the acoustic shock interpretation of the Ca II K 2V grains.
Rutten, R.J. +3 more
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On the dynamic nature of the prolate solar chromosphere: jet formation
, 2007 Context.In “cool” spectral lines, the smoothed upper edge of the solar chromosphere is prolate in the South-North direction at the epoch of minimum solar activity and nearly spherically symmetric at the maximum phase.
Koutchmy, S. +5 more
core +1 more source