Detection of CMES (coronal mass ejections) in the interplanetary medium from 1976-1979 using HELIOS-2 photometer data
The use of HELIOS-2 (H2) zodiacal light photometer data to detect solar coronal mass ejections (CMEs) in the interplanetary (IP) medium is described. Data from the north ecliptic pole (+90 deg) photometer are used to identify transient flux increases which are interpreted as plasma clouds of Thomson-scattered electrons enveloping the spacecraft or passing north of it. These data are used to study the characteristics of CMEs in the IP medium during a 4-year period, from 1976 through 1979, covering a gap in coronagraph observations. Most of the WL transients were also detected at the spacecraft as in-situ plasma enhancements, with significant rotation of the IMF and evidence for the passage of magnetic clouds. The extrapolated solar-source regions of the transients were often associated with bright, long-lived coronal regions which define the heliomagnetic equator. Finally, the occurrence rate of IP CMEs increased toward solar maximum, with the 1979 HELIOS and SOLWIND CME rates in basic agreement.
- Research Organization:
- Emmanuel Coll., Boston, MA (USA)
- OSTI ID:
- 5841900
- Report Number(s):
- AD-A-207955/6/XAB; SCIENTIFIC-2
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
ATMOSPHERES
DETECTION
ELECTROMAGNETIC RADIATION
INTERPLANETARY SPACE
MAGNETIC FIELDS
MASS
MASS TRANSFER
MEASURING INSTRUMENTS
PHOTOMETERS
RADIATIONS
SOLAR ACTIVITY
SOLAR CORONA
SOLAR FLUX
SOLAR WIND
SPACE
STELLAR ATMOSPHERES
STELLAR CORONAE
TRANSIENTS
ZODIACAL LIGHT