Radio Versus EUV/X-Ray Observations of the Solar Atmosphere

Details Radio Versus EUV/X-Ray Observations of the Solar Atmosphere Radio Versus EUV/X-Ray Observations of the Solar Atmosphere

Dec 1999

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999soph..190..309w&link_type=abstract

Solar Physics, v. 190, Issue 1/2, p. 309-330 (1999).

Physics

8

Scientific paper

This paper reviews the contrasting properties of radio and EUV/X-ray observations for the study of the solar atmosphere. The emphasis is placed on explaining the nature of radio observations to an EUV/X-ray audience. Radio emission is produced by mechanisms which are well-understood within classical physics. Bremsstrahlung tends to be dominant at low frequencies, while gyro-resonance emission from strong magnetic fields produces bright sources at higher frequencies. At most radio frequencies the images of the Sun are dominated almost everywhere by bremsstrahlung opacity, which may be optically thick or thin depending on circumstances. Where gyro-resonance sources are present they may be used as sensitive probes of the regions above active regions where magnetic field strengths exceed several hundred gauss, and this unique capability is one of the strengths of radio observations. Typically a gyro-resonance radio source shows the temperature on an optically thick surface of constant magnetic field within the corona. Since each radio frequency corresponds to a different magnetic field strength, the coronal structure can be `peeled away' by using different frequencies. The peculiarities of radio observing techniques are discussed and contrasted with EUV/X-ray techniques. Radio observations are strong at determining temperatures and coronal magnetic field strengths while EUV/X-ray observations better sense densities and reveal coronal magnetic field lines: in this way the two wavelength domains are nicely complementary.

Affiliated with

Also associated with

No associations

Rating

Radio Versus EUV/X-Ray Observations of the Solar Atmosphere 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 Versus EUV/X-Ray Observations of the Solar Atmosphere, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Radio Versus EUV/X-Ray Observations of the Solar Atmosphere will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1061780