Astronomy and Astrophysics – Astrophysics
Scientific paper
Mar 2007
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007aipc..895...49s&link_type=abstract
FIFTY YEARS OF ROMANIAN ASTROPHYSICS. AIP Conference Proceedings, Volume 895, pp. 49-58 (2007).
Astronomy and Astrophysics
Astrophysics
Chromosphere, Solar Instruments
Scientific paper
With the new ground-based and space instrumentation observing the solar atmosphere, it is clear nowadays that the quiet sun is of dynamical nature. The Swedish 1m telescope (SST) with its spatial resolution better than 0.2 arc sec. allows us to follow the dynamics of the fine structures observed in photospheric, as well in chromospheric lines. THEMIS with its high magnetic sensitivity reaching 10-5 permits to relate the dynamics of fine structures of spicules and prominences to the small scale magnetic evolution: i.e. canceling and emerging flux. Space instruments (SOHO/MDI, TRACE 1600 Å) observe the activity of the photosphere/chromosphere with high cadence (< 10 sec) and high resolution (larger than 0.5 arc sec).
This review concerns observations of spicules, mottles and filaments obtained in chromospheric lines. The dynamics is obtained by measuring the flows using Dopplershifts and horizontal displacements by time slice methods. The observed velocities are interpreted either by acoustic shock wave or magnetic reconnection models.
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