Intensity and Velocity Oscillations in Magnetic Flux Concentrations (P9)

Details Intensity and Velocity Oscillations in Magnetic Flux Concentrations (P9) Intensity and Velocity Oscillations in Magnetic Flux Concentrations (P9)

Nov 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006ihy..worke.101b&link_type=abstract

2nd UN/NASA Workshop on International Heliophysical Year and Basic Space Science. Proceedings of the conference held 27 Novembe

Astronomy and Astrophysics

Astrophysics

Scientific paper

We analyzed intensity and velocity oscillations in magnetic network using high-resolution 2D spectral scan images from Interferometric Bi- dimensional Spectrometer (IBIS). In photosphere, oscillations in intensity and velocity in 2-5.2 mHz band shows reduced amplitude while at higher frequencies 5.2-7.0 mHz and 7.3-25.8 mHz band oscillations amplitude enhance in line core intensity and shows reduced amplitude in line core velocity however in chromosphere the oscillations have different character, we found higher power in 2-5.2 mHz, 5.2-7.0 mHz and 7.3-25.8 mHz band in core velocity compared to core intensity. Amplitude variation with height is also inferred from our analysis. These findings are manifestation of high frequencies halos around strong flux concentrations (pores) in intermediate field strength network and mode conversion of solar p-modes in magnetic fields.

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