Astronomy and Astrophysics – Astronomy
Scientific paper
Feb 1991
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991tuft.rept.....w&link_type=abstract
Final Technical Report, 1 Feb. 1985 - 31 Jan. 1991 Tufts Univ., Medford, MA. Dept. of Physics and Astronomy.
Astronomy and Astrophysics
Astronomy
Solar Corona, Solar Flares, Solar Maximum Mission, Solar Radio Bursts, Solar Spectra, Very Large Array (Vla), X Ray Spectra, Coronal Loops, Cyclotron Radiation, Electron Density (Concentration), High Temperature Plasmas, Magnetic Flux, Relativistic Particles, Spatial Resolution, Thermal Emission
Scientific paper
Very Large Array observations at 20 cm wavelength can detect the hot coronal plasma previously observed at soft x ray wavelengths. Thermal cyclotron line emission was detected at the apex of coronal loops where the magnetic field strength is relatively constant. Detailed comparison of simultaneous Solar Maximum Mission (SMM) Satellite and VLA data indicate that physical parameters such as electron temperature, electron density, and magnetic field strength can be obtained, but that some coronal loops remain invisible in either spectral domain. The unprecedent spatial resolution of the VLA at 20 cm wavelength showed that the precursor, impulsive, and post-flare components of solar bursts originate in nearby, but separate loops or systems of loops.. In some cases preburst heating and magnetic changes are observed from loops tens of minutes prior to the impulsive phase. Comparisons with soft x ray images and spectra and with hard x ray data specify the magnetic field strength and emission mechanism of flaring coronal loops. At the longer 91 cm wavelength, the VLA detected extensive emission interpreted as a hot 105 K interface between cool, dense H alpha filaments and the surrounding hotter, rarefield corona. Observations at 91 cm also provide evidence for time-correlated bursts in active regions on opposite sides of the solar equator; they are attributed to flare triggering by relativistic particles that move along large-scale, otherwise-invisible, magnetic conduits that link active regions in opposite hemispheres of the Sun.
No associations
LandOfFree
Simultaneous Solar Maximum Mission (SMM) and Very Large Array (VLA) 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 Solar Maximum Mission (SMM) and Very Large Array (VLA) observations of solar active regions, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Simultaneous Solar Maximum Mission (SMM) and Very Large Array (VLA) observations of solar active regions will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1320698