Radio Bright Structures near the Solar Poles at Millimeter Wavelengths

Details Radio Bright Structures near the Solar Poles at Millimeter Wavelengths Radio Bright Structures near the Solar Poles at Millimeter Wavelengths

Dec 1999

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999spro.proc...31p&link_type=abstract

Solar Physics with Radio Observations, Proceedings of the Nobeyama Symposium, held in Kiyosato, Japan, Oct. 27-30, 1998, Edited

Physics

Scientific paper

Polar radio brightenings have previously been observed in the wavelength range 15-48 GHz, but at higher frequencies the observations have not been so clear: besides local brightenings, also depressions and uniform brightness areas have been reported. In this study high frequency solar radio maps obtained at 87 GHz (3.5 mm) at the Metsähovi Radio Observatory, were analysed and compared with the SOHO/EIT EUV-images. The data consisted of nearly simultaneous radio and EIT maps obtained during 1996 and 1997. Some radio enhancements were found to have polar plume bases, but most often the polar radio brightenings corresponded to coronal hole-like structures and bright diffuse sources seen in the EIT images. The radio depressions near the solar poles corresponded well with mini-coronal holes and coronal holes seen in EUV. However, only a few of the many -- and sometimes large -- low density regions seen in EUV were seen as depressions at millimeter waves. Therefore the conception of coronal hole brightenings can be extended to higher frequencies.

Affiliated with

Also associated with

No associations

Rating

Radio Bright Structures near the Solar Poles at Millimeter Wavelengths 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 Radio Bright Structures near the Solar Poles at Millimeter Wavelengths, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Radio Bright Structures near the Solar Poles at Millimeter Wavelengths will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1062069