NASA Logo

NTRS

NTRS - NASA Technical Reports Server

Back to Results
Multi-wave band SMM-VLA observations of an M2 flare and an associated coronal mass ejectionResults are presented of observations of an M2 flare and an associated coronal mass ejection CME by instruments on the SMM as well as by the VLA and other ground-based observatories on September 30, 1988. The multiwave band data show a gradual slowly changing event which lasted several hours. The microwave burst emission was found to originate in compact moderately circularly polarized sources located near the sites of bright H-alpha and soft X-ray emission. These data are combined with estimates of an electron temperature of 1.5 x 10 to the 7th K and an emission measure of about 2.0 x 10 to the 49th/cu cm obtained from Ca XIX and Fe XXV spectra to show that the microwave emission can be attributed to thermal gyrosynchrotron radiation in regions where the magnetic field strength is 425-650 G. The CME acceleration at low altitudes is measured on the basis of ground- and space-based coronagraphs.
Document ID
19910065889
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Willson, Robert F.
(Tufts Univ. Medford, MA, United States)
Lang, Kenneth R.
(Tufts University Medford, MA, United States)
Schmelz, Joan T.
(NASA Goddard Space Flight Center; Applied Research Corp. Greenbelt, MD, United States)
Gonzalez, Raymond D.
(National Radio Astronomy Observatory Socorro, NM, United States)
Smith, Kermit L.
(Lockheed Research Laboratories Palo Alto, CA, United States)
Date Acquired
August 14, 2013
Publication Date
September 1, 1991
Publication Information
Publication: Astrophysical Journal, Part 1
Volume: 378
ISSN: 0004-637X
Subject Category
Solar Physics
Accession Number
91A50512
Funding Number(s)
CONTRACT_GRANT: AF-AFOSR-89-0147
CONTRACT_GRANT: NAGW-2383
CONTRACT_GRANT: NAS5-30431
CONTRACT_GRANT: NAS5-28713
Distribution Limits
Public
Copyright
Other

Available Downloads

There are no available downloads for this record.
No Preview Available