Solar minimum Lyman. alpha. sky background observations from Pioneer Venus orbiter ultraviolet spectrometer: Solar wind latitude variation

Journal Article · Sat Sep 01 04:00:00 EDT 1990 · Journal of Geophysical Research; (United States)

OSTI ID:5452874

Ajello, J M ^[1]

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1. California Inst. of Tech., Pasadena (USA)

Measurements of interplanetary H I Lyman {alpha} over a large portion of the celestial sphere were made at the recent solar minimum by the Pioneer Venus orbiter ultraviolet spectrometer. These measurements were performed during a series of spacecraft maneuvers conducted to observe Halley's comet in early 1986. Analysis of these data using a model of the passage of interstellar wind hydrogen through the solar wind system shows that the rate of charge exchange with solar wind protons is 30% less over the solar poles than in the ecliptic. This result is in agreement with a similar experiment performed with Mariner 10 at the previous solar minimum.

• OSTI ID: 5452874
• Journal Information: Journal of Geophysical Research; (United States), Journal Name: Journal of Geophysical Research; (United States) Vol. 95:A9; ISSN 0148-0227; ISSN JGREA
• Country of Publication: United States
• Language: English

Related Subjects

640107* -- Astrophysics & Cosmology-- Planetary Phenomena
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
BARYONS
CHARGE EXCHANGE
COMETS
DATA ANALYSIS
ELEMENTARY PARTICLES
ELEMENTS
FERMIONS
HADRONS
HALLEY COMET
HYDROGEN
INTERPLANETARY SPACE
INTERSTELLAR SPACE
LYMAN LINES
MATHEMATICAL MODELS
MEASURING INSTRUMENTS
NONMETALS
NUCLEONS
PIONEER SPACE PROBES
PROTONS
RADIATIONS
SOLAR ACTIVITY
SOLAR CYCLE
SOLAR PARTICLES
SOLAR PROTONS
SOLAR RADIATION
SOLAR WIND
SPACE
SPACE VEHICLES
SPECTROMETERS
STELLAR RADIATION
ULTRAVIOLET SPECTROMETERS
VARIATIONS
VEHICLES