منابع مشابه
Chromospheric Flares
In this topical review I revisit the “chromospheric flare”. This should currently be an outdated concept, because modern data seem to rule out the possiblity of a major flare happening independently in the chromosphere alone, but the chromosphere still plays a major observational role in many ways. It is the source of the bulk of a flare’s radiant energy – in particular the visible/UV continuum...
متن کاملChromospheric Oscillations
We show results from NSO/Sacramento Peak data to discuss three issues: (i)—the spatial occurrence of chromospheric 3–min oscillations; (ii)—the validity of Ca II H&K line-center Doppler Shift measurements; (iii)—the significance of oscillation power and phase at frequencies above 10 mHz.
متن کاملChromospheric Fine Structure Didactically
The solar chromosphere is occupied with a wealth of fine structures referred to by diverse nomenclature. Recent identification of slow-mode magnetoacoustic shocks, excited by p-modes of photospheric oscillations, as plausible drivers of dynamic fibrils and spicules was followed by a surge of observational studies and numerical simulations attempting to reveal the role of chromospheric fine stru...
متن کاملChromospheric evidence for magnetic reconnection
We study the decay phase of an M2.6 flare, observed with ground based instruments at NSO/Sac Peak and with the cluster of instruments onboard Yohkoh. The whole set of chromospheric and coronal data gives a picture consistent with the classical Kopp-Pneumanmodel of two-ribbon flares.We clearly witness new episodes of coronal energy release, most probably due to magnetic reconnection, during the ...
متن کاملChromospheric Dynamics and Line Formation
The solar chromosphere is very dynamic, due to the presence of large amplitude hydrodynamic waves. Their propagation is affected by NLTE radiative transport in strong spectral lines, which can in turn be used to diagnose the dynamics of the chromosphere. We give a basic introduction into the equations of NLTE radiation hydrodynamics and describe how they are solved in current numerical simulati...
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ژورنال
عنوان ژورنال: Monthly Notices of the Royal Astronomical Society
سال: 1957
ISSN: 0035-8711,1365-2966
DOI: 10.1093/mnras/117.1.22