Astronomy and Astrophysics – Astrophysics
Scientific paper
Jun 1987
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987apj...317..522g&link_type=abstract
Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 317, June 1, 1987, p. 522-533.
Astronomy and Astrophysics
Astrophysics
33
Microwave Spectra, Solar Activity, Solar Eclipses, Stellar Spectrophotometry, Brightness Temperature, Coronal Loops, Microwave Frequencies, Solar Magnetic Field
Scientific paper
Spatially-resolved microwave observations of a complex active region at 16 frequencies in the range 1.4-8 GHz are presented. One-dimensional profiles of the active region at each frequency were obtained with the Owens Valley frequency-agile interferometer, with 2.6-arcsec spatial resolution provided by the lunar limb during a partial eclipse. Simultaneous two-dimensional maps were obtained with the VLA at 1.45 and 4.9 GHz. The combination of spatial and spectral resolution allows the direct observation of the change in emission mechanism from predominantly free-free emission from dense active region loops at low frequencies to gyroresonance emission from regions of intense magnetic fields at high frequencies. The change occurs, for this active region, at about 3 GHz. The implications of the brightness temperature spectrum for the coronal structure of the active region are discussed.
Gary Dale E.
Hurford Gordon J.
No associations
LandOfFree
Multifrequency observations of a solar active region during a partial eclipse 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 Multifrequency observations of a solar active region during a partial eclipse, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Multifrequency observations of a solar active region during a partial eclipse will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1813967