Analysis of O/sup 7 +//O/sup 6 +/ observations in the solar wind

Journal Article · Tue Oct 01 04:00:00 EDT 1985 · J. Geophys. Res.; (United States)

DOI:https://doi.org/10.1029/JA090iA10p09881· OSTI ID:6200759

Ogilvie, K W

The ratio of O/sup 7 +//O/sup 6 +/ in the solar wind can be used to deduce the temperature at the point in the corona where the charge states become ''frozen'' in the flow, and its determination therefore depends both upon the characteristics of the instrument and those of the source. The apparent increase of the ratio O/sup 7 +//O/sup 6 +/ observed in the solar wind by K. W. Ogilvie and C. Vogt (1980) at speeds above 450 km s/sup -1/ has been reevaluated using ta gretly expanded data set. The ratio observed for solar wind speeds less than 450 km s/sup -1/ corresponds to an electron temperature of 1.7 +- 0.2 x 10/sup 60/K in the region of ''freezing in'' of th flow, as was previously reported. At higher speeds, when the kinetic temperature of the solar wind often exceeds 2--3 x 10/sup 50/K, instrumental effects become large and corrections difficult to determine.

• Research Organization: Laboratory for Extraterrestrial Physics, NASA Goddard Space Flight Center, Greenbelt, Maryland
• OSTI ID: 6200759
• Journal Information: J. Geophys. Res.; (United States), Journal Name: J. Geophys. Res.; (United States) Vol. 90:A10; ISSN JGREA
• Country of Publication: United States
• Language: English

Related Subjects

640104* -- Astrophysics & Cosmology-- Solar Phenomena
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
ATMOSPHERES
CHARGED PARTICLES
ELECTRON TEMPERATURE
IONIC COMPOSITION
IONS
OXYGEN IONS
SOLAR ACTIVITY
SOLAR CORONA
SOLAR WIND
STELLAR ATMOSPHERES
STELLAR CORONAE