Pregled bibliografske jedinice broj: 1264574
Variability of EUV-spectra from the quiet upper solar atmosphere: Intensity and Doppler shift
Variability of EUV-spectra from the quiet upper solar atmosphere: Intensity and Doppler shift // Astronomy & Astrophysics, 403 (2003), 2; 725-730 doi:10.1051/0004-6361:20030400 (međunarodna recenzija, članak, znanstveni)
CROSBI ID: 1264574 Za ispravke kontaktirajte CROSBI podršku putem web obrasca
Naslov
Variability of EUV-spectra from the quiet upper solar atmosphere: Intensity and Doppler shift
Autori
Brković, Alen ; Peter, Hardi ; Solanki, Sami Khan
Izvornik
Astronomy & Astrophysics (0004-6361) 403
(2003), 2;
725-730
Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni
Ključne riječi
Sun: chromosphere / Sun: corona / Sun: transition region / Sun: UV radiation
Sažetak
We have studied SUMER and CDS time series of spectra and images of quiet-Sun regions at the solar disc centre. The data contain ultraviolet emission lines sampling temperatures of the chromosphere, transition region and corona. We find a high correlation between average net Doppler shifts and relative brightness variabilities of the studied lines (correlation coefficient of 0.92), suggesting a connection between the two quantities. The anti-correlation between differential emission measures and relative brightness variabilities is weaker (correlation coefficient of -0.78). We discuss the observed relationships on the basis of differential emission measures and linear wave calculations.
Izvorni jezik
Engleski
Znanstvena područja
Fizika
