Abstract
view Abstract Citations (30) References (22) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS Microwave Structure of the Quiet Sun Gary, Dale E. ; Zirin, Harold Abstract The authors present two-frequency VLA observations of the quiet Sun obtained on 1985 July 13, when the Sun was particularly quiet. The 4.9 GHz full-day synthesis maps correspond closely to images made in Hα, Ca II K, and magnetograms, while the correspondence is much reduced at 1.45 GHz. The 4.9 GHz maps have a meshlike appearance reminiscent of chromospheric network structure. Simultaneous magnetograms from Big Bear Solar Observatory are used to compare the structure of the magnetic field with the radio source structure at the two frequencies. Magnetograms of each pointing field were taken at least once every half-hour for monitoring the changing structure of the longitudinal component of the magnetic fields. The authors identify changes such as the appearance of an ephemeral region and the cancellation of opposite-polarity magnetic flux, and discuss corresponding changes in radio sources. Publication: The Astrophysical Journal Pub Date: June 1988 DOI: 10.1086/166443 Bibcode: 1988ApJ...329..991G Keywords: Chromosphere; Magnetic Signatures; Solar Magnetic Field; Solar Radio Emission; Very Large Array (Vla); Astronomical Maps; Electron Acceleration; Radio Astronomy; Solar Physics; SUN: CHROMOSPHERE; SUN: MAGNETIC FIELDS; SUN: RADIO RADIATION full text sources ADS |
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