Propagating magneto-acoustic waves in the solar chromosphere.

Details Propagating magneto-acoustic waves in the solar chromosphere. Propagating magneto-acoustic waves in the solar chromosphere.

Oct 1996

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996a%26a...314l...9b&link_type=abstract

Astronomy and Astrophysics, v.314, p.L9-L12

Astronomy and Astrophysics

Astrophysics

23

Sun: Oscillations, Sun: Atmosphere, Sun: Magnetic Fields

Scientific paper

We report on spectroscopic one dimensional observations showing for the first time upward propagating 5mn period waves, which emerge from the deep chromospheric network. Wavetrains are well measured at the height where the He I line (at A=1083nm) is formed by the coronal back radiation. We also present results from a time series of narrow filtergrams of a quiet region at the disk center. The two dimensional mapping of the power of waves observed in the chrormosphere shows the familiar cell-like distribution corresponding to the network magnetic field pattern. In addition, Fourier components with significantly longer periods than 5mn were detected in the chromospheric network. We suggest that the waves propagating in the open corona are reminescent of photospheric oscillations transmitted by the magnetic field of the chromospheric network.

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