Resolution of the discrepancy between Balmer. cap alpha. emission rates, the solar Lyman. beta. flux, and models of geocoronal hydrogen concentration

Journal Article · Mon Nov 01 04:00:00 EST 1976 · J. Geophys. Res.; (United States)

DOI:https://doi.org/10.1029/JA081i031p05587· OSTI ID:7240229

Levasseur, A; Meier, R R; Tinsley, B A

New satellite Balmer ..cap alpha.. measurements and solar Lyman ..beta.. flux and line profile measurements, together with new measurements of the zodiacal light intensity used in correcting both ground and satellite Balmer ..cap alpha.. measurements for the effects of the Fraunhofer line in the zodiacal light, have been used in a reevaluations of the long-standing discrepancy between ground-based Balmer ..cap alpha.. emission rates and other geocoronal hydrogen parameters. The solar Lyman ..beta.. line center flux is found to be (4.1 +- 1.3) x 10/sup 9/ photons cm/sup -2/ s/sup -1/ A/sup -1/ at S/sub 10//sub .//sub 7/=110 and, together with a current hydrogen model which has 9.2 x 10/sup 4/ atoms cm/sup -3/ at 650 km for T/sub infinity/=950 K, gives good agreement between calculated Balmer ..cap alpha.. emission rates and the ground-based and satellite measurements. (AIP)

• Research Organization: Centre National de la Recherche Scientifique, Service d'Aeronomie, Verrieres-le-Buisson, France
• OSTI ID: 7240229
• Journal Information: J. Geophys. Res.; (United States), Journal Name: J. Geophys. Res.; (United States) Vol. 81:31; ISSN JGREA
• Country of Publication: United States
• Language: English

Related Subjects

640104* -- Astrophysics & Cosmology-- Solar Phenomena
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
BALMER LINES
CRYOGENIC FLUIDS
ELECTROMAGNETIC RADIATION
ELEMENTS
FLUIDS
HYDROGEN
LYMAN LINES
NONMETALS
RADIATIONS
SOLAR CYCLE
SOLAR RADIATION
STARS
SUN
ZODIACAL LIGHT