Astronomy and Astrophysics – Astronomy
Scientific paper
May 1992
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992aas...180.4511s&link_type=abstract
American Astronomical Society, 180th AAS Meeting, #45.11; Bulletin of the American Astronomical Society, Vol. 24, p.804
Astronomy and Astrophysics
Astronomy
Scientific paper
A primary goal of CoMStOC '92 is to directly measure the magnetic field strength and determine its structure in the solar corona, especially for pre- and post-flare active regions. New instrumentation and analysis techniques were combined with experience gained during a previous campaign to improve the observing strategies and data interpretation. 15 days of VLA observation were scheduled between 03 April -- 12 May 1992. Observations were also obtained by the instruments on the Japanese Yohkoh spacecraft, ground-based magnetographs, and the Owens Valley Radio Observatory. At the time of writing, the Solar Plasma Diagnostics Experiment rocket payload (M. Bruner, Lockheed) planned to launch and the Tunable Filter (T. Tarbell, Lockheed) planned to observe during the campaign. The basic CoMStOC method for determining the magnetic field is as follows: When the microwave emission is dominated by gyroresonance, the magnetic field strength is B(Gauss) = 357times nu (GHz)/n, where nu is the microwave observing frequency and n is the harmonic. When thermal bremsstrahlung dominates, the field is determined by the microwave polarization. Maps of the electron temperature and emission measure of the coronal plasma are made from images taken with the Soft X-ray Telescope on Yohkoh; these maps are then used to calculate which microwave emission mechanism dominates. Once this dominant mechanism is known, the magnetic field strength can be calculated. The values obtained using this method are then compared with extrapolations photospheric magnetograms into the corona. (*) NAS/NRC Resident Research Associate
Brosius Jeffrey W.
Holman Gordon D.
Schmelz Joan T.
No associations
LandOfFree
CoMStOC '92: The Coronal Magnetic Structures Observing Campaign does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with CoMStOC '92: The Coronal Magnetic Structures Observing Campaign, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and CoMStOC '92: The Coronal Magnetic Structures Observing Campaign will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1513260