Doppler Shift Oscillations Observed with the EUV Imaging Spectrometer on Hinode

Details Doppler Shift Oscillations Observed with the EUV Imaging Spectrometer on Hinode Doppler Shift Oscillations Observed with the EUV Imaging Spectrometer on Hinode

Dec 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009aspc..415..283m&link_type=abstract

The Second Hinode Science Meeting: Beyond Discovery-Toward Understanding ASP Conference Series, Vol. 415, proceedings of a meeti

Astronomy and Astrophysics

Astronomy

1

Scientific paper

This contribution reports on the detection of Doppler-shift oscillations in an active region observed on 2007 August 22-23. The oscillations, which have a much lower amplitude than those observed with earlier instruments, have periods of 7 to 10 min. These observations include density-sensitive emission lines and oscillations are also present in the derived densities. EIS is capable of detecting coronal velocity fluctuations with amplitudes of less than 0.5 km s-1 with short integration times in strong coronal lines, potentially allowing access to a much richer range of coronal oscillatory phenomena than has been available with earlier instruments.

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