Solar transition region

Ebook "Ultraviolet and X-ray spectroscopy of the solar atmosphere" give us information about temperatures, densities, flow velocities, filling factors (indicating to what extent features are being spatially resolved), thermal structure, element abundances, ionization state of solar plasmas in the outer parts of the solar atmosphere: the chromosphere, the corona and the enigmatic transition region. They also allow insight into all phenomena in the solar atmosphere, e.g. flares, jets, and prominences.

390p duongthandue0501 28-02-2024 1 1   Download

This study presents a simplified higher order multivariate Markov chain analysis founded on a combination of a mixture-transition and a stochastic technique to project the solar radiation, air humidity, ambient temperatures as well as wind speeds and their interrelationships in sub-tropical climates, typically the coastal regions of South Africa.

15p cleopatrahuynh 01-06-2020 24 1   Download

At the time of the two last solar total eclipses of August 1st, 2008 in Siberia and July 11th, 2010 in French Polynesia, high frame rate CCD flash spectra were obtained. These eclipses occurred in quiet Sun period and after. The slitless flash spectra show two helium shells, in the weak Paschen a 4686 A˚ line of the ionized helium HeII and in the neutral helium HeI line at 4713 A˚ . The extensions of these helium shells are typically 3 Mm. In prominences, the extension of the interface with the corona is much more extended.

7p kethamoi1 17-11-2019 9 0   Download