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Ly-alpha and white light observations of a CME during the Spartan 201-1 missionA coronal mass ejection (CME) near a large active region on the west limb was observed with the white light coronograph (WLC) and ultraviolet coronal spectrometer (UVCS) on the Spartan 201 satellite at 9:42 UT on 12 Apr. 1993. Soft X-ray images of the region below the CME were obtained out to 1.7 solar radii with the soft X-ray telescope (SXT) on Yohkoh. After the event, the formation of a new helmet streamer could be seen in the polarized brightness (pB) images from the Mk III coronograph at Mauna Loa. The CME was observed from Spartan 201 in two different pB images obtained 14 min apart using the WLC, and was observed moving through the field-of-view of the UVCS integrated intensity slit. Ly-alpha intensities in the same region of the corona were obtained one orbit earlier (prior to the CME) using the Ly-alpha profile slit of the UVCS. These are the first Ly-alpha observations of a CME and may help constrain models of the electron temperature on CME's.
Document ID
19950025509
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Hassler, Don M.
(National Center for Atmospheric Research Boulder, CO., United States)
Strachan, Leonard
(Harvard-Smithsonian Center for Astrophysics Cambridge, MA., United States)
Gardner, L. D.
(Harvard-Smithsonian Center for Astrophysics Cambridge, MA., United States)
Kohl, J. L.
(Harvard-Smithsonian Center for Astrophysics Cambridge, MA., United States)
Guhathakurta, Madhulika
(NASA Goddard Space Flight Center Greenbelt, MD, United States)
Fisher, Richard R.
(NASA Goddard Space Flight Center Greenbelt, MD, United States)
Strong, K.
(Lockheed Aircraft Corp. Palo Alto, CA., United States)
Date Acquired
August 16, 2013
Publication Date
December 1, 1994
Publication Information
Publication: ESA, Proceedings of 3rd SOHO Workshop on Solar Dynamic Phenomena and Solar Wind Consequences
Subject Category
Solar Physics
Accession Number
95N31930
Funding Number(s)
CONTRACT_GRANT: NAS8-37334
CONTRACT_GRANT: NAG5-613
Distribution Limits
Public
Copyright
Other
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