Astronomy and Astrophysics – Astronomy
Scientific paper
Oct 1985
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985apj...297..805n&link_type=abstract
Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 297, Oct. 15, 1985, p. 805-825.
Astronomy and Astrophysics
Astronomy
70
Extreme Ultraviolet Radiation, Plumes, Solar Spectra, Sunspots, Ultraviolet Astronomy, Emission Spectra, Inhomogeneity, Ionization, Line Spectra, Plasma Cooling, Space Plasmas, Tables (Data)
Scientific paper
A complete extreme ultraviolet spectrum of a sunspot plume by the Skylab S-055 spectroheliometer is presented, and the relevant observational details are discussed. Identifications and intensities are given for emission lines and continua in the 303-1343 A range. The emission from lines found between 100,000 and a million K are enhanced by up to a factor of 40 compared with quiet and active region spectra. The emission measure curve for the mean spectrum shows a high double peak at log T = 5.7 and 6.0, reflecting the very inhomogeneous spatial structure of the sunspot plumes. The extremely high signal to noise of the spectrum is used to investigate the electron density and ionization stage of the gas based on line ratio techniques. A model of line emission from a gas cooling by radiation alone at constant density is presented, and the observations are compared with various semiempirical and theoretical models.
Doyle Gerry J.
Kingston A. E.
Noyes Robert W.
Raymond John C.
No associations
LandOfFree
The extreme ultraviolet spectrum of sunspot plumes. I - Observations does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with The extreme ultraviolet spectrum of sunspot plumes. I - Observations, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and The extreme ultraviolet spectrum of sunspot plumes. I - Observations will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1545710