Structure and spectrum of quiescent prominences. II. Hydrogen and helium spectra

Journal Article · Wed Dec 15 04:00:00 EST 1976 · Astrophys. J.; (United States)

DOI:https://doi.org/10.1086/154892· OSTI ID:7336082

Heasley, J N; Milkey, R W

Theoretical emission-line intensities for hydrogen and helium in models of quiescent prominences have been computed and are compared with the absolute intensities measured by Landman and Illing. The models required to match the observations have electron temperatures in the range 7500--9500 K and gas pressures equal to or slightly greater than the coronal value. Our calculations indicate a probable lower limit to the helium-to-hydrogen number ratio of y=0.05 for the prominence studied. (AIP)

• Research Organization: Kitt Peak National Observatory, Tucson
• OSTI ID: 7336082
• Journal Information: Astrophys. J.; (United States), Journal Name: Astrophys. J.; (United States) Vol. 210:3; ISSN ASJOA
• Country of Publication: United States
• Language: English

Related Subjects

640104* -- Astrophysics & Cosmology-- Solar Phenomena
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
ABUNDANCE
ATMOSPHERES
CRYOGENIC FLUIDS
ELECTRON TEMPERATURE
ELEMENTS
EMISSION SPECTRA
FLUIDS
FUNCTIONS
HELIUM
HYDROGEN
MATHEMATICAL MODELS
NONMETALS
PHYSICAL PROPERTIES
RARE GASES
SOLAR ACTIVITY
SOLAR ATMOSPHERE
SOLAR PROMINENCES
SPECTRA
SPECTRAL DENSITY
SPECTRAL FUNCTIONS
STAR MODELS