Dynamical properties of the chromosphere in and out of the solar magnetic network

Abstract

view Abstract Citations (18) References (18) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS Dynamical Properties of the Chromosphere In and Out of the Solar Magnetic Network Bocchialini, Karine ; Vial, Jean-Claude ; Koutchmy, Serge Abstract We present the results of a comparative analysis of an 83 minute time sequence of spectra taken around the Ca II and He I 1083 lines, near the center of the solar disk and away from active regions. We discuss the behavior of the Fourier spectra at low frequency: 3 minute oscillations are well observed out of the network, and 5 minute oscillation waves are prominent in the network. The 5 s sampling time also permits the observation of the high-frequency part of the Fourier spectra of intensity and velocity fluctuations at different heights. At high frequencies, K2V-K2R and 1083 (velocity) results differ when magnetic and non-magnetic regions are compared. Publication: The Astrophysical Journal Pub Date: March 1994 DOI: 10.1086/187237 Bibcode: 1994ApJ...423L..67B Keywords: Chromosphere; Dynamic Characteristics; Fourier Analysis; Magnetohydrodynamics; Solar Corona; Solar Magnetic Field; Solar Oscillations; Solar Physics; Sun; Birefringent Filters; Charge Coupled Devices; Spectrographs; Telephotometry; Telescopes; Temporal Resolution; Solar Physics; MAGNETOHYDRODYNAMICS: MHD; SUN: CHROMOSPHERE; SUN: CORONA; SUN: OSCILLATIONS full text sources ADS |