Bibcode
Kucera, A.; Beck, Ch.; Gomory, P.; Koza, J.; Woehl, H.; Rybak, J.
Bibliographical reference
"12th European Solar Physics Meeting, Freiburg, Germany, held September, 8-12, 2008. Online at http://espm.kis.uni-freiburg.de/, p.2.52"
Advertised on:
9
2008
Citations
0
Refereed citations
0
Description
Spatial and temporal evolution of dynamic fibrils (DF) as well as
coupling with photospheric features was investigated.
The main target were remnants in the active region 10997 on May 28,
2008. We used about 1 hour series of multi wavelength simultaneous
observations of the DFs and corresponding photospheric features. The
observations were performed with the german Vacuum Tower Telescope
equipped with several post-focus instruments. Namely: TESOS (Triple
Etalon SOlar Spectrometer) instrument was used in polarimetric mode
(VIP=Visual Imaging Polarimeter) to register 2D spectra of the DFs in
H-alpha line and in magnetically sensitive Fe I 630.2 nm line. TIP
(Tenerife Infrared Polarimeter) mounted on the Echelle spectrograph was
used for spectropolarimetric observations of two neutral iron lines at
1.56 micrometers. We scanned 2D area 80" x 5", producing thus 2D maps of
intensity, velocity and magnetic field of the low photosphere under the
chromospheric fibril field.
Additionally G-band and H-alpha images were registered with high cadence
and the supporting data from the TRACE satellite (17.1 nm, WL, Lyman
alpha line and 160 nm continuum) are also available. After careful
spatial coalignment of 2D maps we first selected numerous DFs in the
H-alpha images. Then we investigated temporal evolution of those DFs
concerning changes of their dimensions, positions and fluctuations and
correlated these characteristics with temporal evolution of the
intensities, velocities and magnetic field characteristics observed in
the spatially corresponding photosphere. The poster demonstrates the
complex observations, data reduction and coalignment and preliminary
results on coupling between DFs and underlying photospheric features.