Ne VII line ratios in the sun

Journal Article · Thu Nov 01 00:00:00 EST 1990 · Astrophysical Journal; (USA)

DOI:https://doi.org/10.1086/169344· OSTI ID:6316050

Keenan, F P; Mccann, S M; Widing, K G ^[1]

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1. Belfast Queen's Univ. (England) E. O. Hulburt Center for Space Research, Washington, DC (USA)

Theoretical Ne VII electron density sensitive emission-line ratios, derived using electron impact excitation rates calculated with the R-matrix code, are presented for R1 = I(561.7 A)/I(465.2 A) and R2 = I(561.4 A)/I(465.2 A). A comparison of these with observational data for solar flares, obtained with the Naval Research Laboratory's S082A spectrograph on board Skylab, reveals excellent agreement between theory and observation, which confirms the usefulness of R1 and R2 as Ne diagnostics for solar flares, as well as providing experimental support for the accuracy of the atomic data adopted in the line ratio calculations. 36 refs.

• OSTI ID: 6316050
• Journal Information: Astrophysical Journal; (USA), Vol. 363; ISSN 0004-637X
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
SOLAR FLARES
EMISSION SPECTRA
COMPARATIVE EVALUATIONS
COMPUTER CODES
ELECTRON COLLISIONS
ELECTRON DENSITY
ENERGY-LEVEL TRANSITIONS
EXCITATION
NEON
NEON IONS
R MATRIX
CHARGED PARTICLES
COLLISIONS
ELEMENTS
FLUIDS
GASES
IONS
MATRICES
NONMETALS
RARE GASES
SOLAR ACTIVITY
SPECTRA
640104* - Astrophysics & Cosmology- Solar Phenomena