Title: Is there an acoustic resonance in the solar chromosphere?
Abstract: view Abstract Citations (50) References (11) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS Is There an Acoustic Resonance in the Solar Chromosphere? Woodard, M. F. ; Libbrecht, K. G. Abstract By comparing helioseismology data from 1986, 1988, and 1989, it was found that the frequecy dependence of the frequency perturbation of solar p-modes caused by solar activity drops abruptly for modes of frequency above approximately 3.9 mHz. The drop in the frequency dependence of the frequency shift may result from solar cycle changes in the chromosphere, provided that the chromosphere acts as a cavity in which p-modes are trapped (Goldreich et al.). No evidence is found in the temporal power spectrum of a time series of narrow-band Ca II K-line filtergrams of a resonance which would reveal the existence of a chromospheric cavity. This circumstance constrains the possible physical explanations of the frequency shifts. Publication: The Astrophysical Journal Pub Date: June 1991 DOI: 10.1086/186072 Bibcode: 1991ApJ...374L..61W Keywords: Chromosphere; Resonant Frequencies; Solar Atmosphere; Solar Oscillations; Calcium; K Lines; Solar Activity; Solar Physics; SUN: ACTIVITY; SUN: CHROMOSPHERE; SUN: OSCILLATIONS full text sources ADS |
Publication Year: 1991
Publication Date: 1991-06-01
Language: en
Type: article
Indexed In: ['crossref']
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Cited By Count: 26
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