Simultaneous SMM flat crystal spectrometer and Very Large Array observations of solar active regions

Astronomy and Astrophysics – Astronomy

Scientific paper

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

26

Astronomical Spectroscopy, Solar Activity, Very Large Array (Vla), X Ray Astronomy, Astronomical Maps, Plasma Spectra, Solar Corona, Solar Maximum Mission, Solar X-Rays, Spectrometers

Scientific paper

High-resolution images of the quiescent emission from two solar active regions at 20 cm (VLA) and soft X-ray (SMM FCS) wavelengths are compared. There are regions where the X-ray coronal loops have been completely imaged at 20 cm wavelength. In other regions, the X-ray radiation was detected without detectable 20 cm radiation, and vice versa. The X-ray data were used to infer average electron temperatures of about 3-million K and average electron densities of about 2.5 x 10 to the 9th/cu cm for the X-ray emitting plasma in the two active regions. The thermal bremsstrahlung of the X-ray emitting plasma is optically thin at 20 cm wavelength. The 20 cm brightness temperatures were always less than T(e), which is consistent with optically thin bremsstrahlung. The low T(B) can be explained if a higher, cooler plasma covers the hotter X-ray emitting plasma. Thermal gyroresonance radiation must account for the intense 20 cm radiation near and above sunspots where no X-ray radiation is detected.

No associations

LandOfFree

Say what you really think

Search LandOfFree.com for scientists and scientific papers. Rate them and share your experience with other people.

Rating

Simultaneous SMM flat crystal spectrometer and Very Large Array observations of solar active regions 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 Simultaneous SMM flat crystal spectrometer and Very Large Array observations of solar active regions, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Simultaneous SMM flat crystal spectrometer and Very Large Array observations of solar active regions will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFWR-SCP-O-1713529

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.