منابع مشابه
Photospheric magnetic field and chromospheric emission
We present a statistical analysis of network and internetwork properties in the photosphere and the chromosphere. For the first time we simultaneously observed (a) the four Stokes parameters of the photospheric iron line pair at 630.2 nm and (b) the intensity profile of the Ca H line at 396.8 nm. The vector magnetic field was inferred from the inversion of the iron lines. We aim at an understan...
متن کاملExcitation of Chromospheric Wave Transients by Collapsing Granules
The excitation of acoustic waves is studied using 3D numerical simulations of the non-magnetic solar atmosphere and the upper convection zone. Transient acoustic waves in the atmosphere are excited at the top of the convective zone (the cooling layer) and immediately above in the convective overshoot zone, by small granules that undergo a rapid collapse, in the sense that upflow reverses to dow...
متن کاملRelation between photospheric magnetic field and chromospheric emission
Aims. We investigate the relationship between the photospheric magnetic field and the emission of the mid chromosphere of
متن کاملEmission and Excitation Mechanisms of Phosphors
In this chapter, basic concepts involved in luminescencewill be discussed.Wewill take a closer look at a number of excitation mechanisms which are involved in generating luminescence and processes which lead to luminescence, taking illustrative examples from luminescentmaterials applied in fluorescent lamps and cathode ray tubes.With respect to fluorescent lamps, we will restrict ourselves to d...
متن کاملChromospheric 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 This should currently be an outdated concept, because modern data seem to rule out the possiblity of a major flare happening independently in the chromosphere alone, but the chromosphere still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...
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ژورنال
عنوان ژورنال: Monthly Notices of the Royal Astronomical Society
سال: 1956
ISSN: 0035-8711,1365-2966
DOI: 10.1093/mnras/116.4.419