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Electron Temperatures and Flow Speeds of the Low Solar Corona: MACS Results from the Total Solar Eclipse of 29 March 2006 in LibyaAn experiment was conducted in conjunction with the total solar eclipse on 29 March 2006 in Libya to measure both the electron temperature and its flow speed simultaneously at multiple locations in the low solar corona by measuring the visible K-coronal spectrum. Coronal model spectra incorporating the effects of electron temperature and its flow speed were matched with the measured K-coronal spectra to interpret the observations. Results show electron temperatures of (1.10 +/- 0.05) MK, (0.70 +/- 0.08) MK, and (0.98 +/- 0.12) MK, at 1.1 Solar Radius from Sun center in the solar north, east and west, respectively, and (0.93 +/- 0.12) MK, at 1.2 Solar Radius from Sun center in the solar west. The corresponding outflow speeds obtained from the spectral fit are (103 +/- 92) km/s, (0 + 10) km/s, (0+10) km/s, and (0+10) km/s. Since the observations were taken only at 1.1 Solar Radius and 1.2 Solar Radius from Sun center, these speeds, consistent with zero outflow, are in agreement with expectations and provide additional confirmation that the spectral fitting method is working. The electron temperature at 1.1 Solar Radius from Sun center is larger at the north (polar region) than the east and west (equatorial region).
Document ID
20120010092
Acquisition Source
Goddard Space Flight Center
Document Type
Reprint (Version printed in journal)
Authors
Reginald, Nelson L.
(Catholic Univ. of America Greenbelt, MD, United States)
Davila, Joseph M.
(NASA Goddard Space Flight Center Greenbelt, MD, United States)
SaintCyr, O.
(NASA Goddard Space Flight Center Greenbelt, MD, United States)
Rabin, Douglas M.
(NASA Goddard Space Flight Center Greenbelt, MD, United States)
Guhathakurta, Madhulika
(NASA Headquarters Washington, DC United States)
Hassler, Donald M.
(Southwest Research Inst. Boulder, CO, United States)
Gashut, Hadi
(Libyan Center for Remote Sensing and Space Science Tripoli, Libya)
Date Acquired
August 25, 2013
Publication Date
March 29, 2011
Publication Information
Publication: Solar Physics
Volume: 270
Subject Category
Solar Physics
Report/Patent Number
GSFC.JA.00284.2012
Distribution Limits
Public
Copyright
Other

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