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FLEX
The FLuorescence EXplorer (FLEX) mission proposes a satellite for the global monitoring of steady-state chlorophyll fluorescence in terrestrial vegetation.
UFFO/UBAT
UFFO stands for Ultra Fast Flash Observatory and it is a
dedicated mission to study the early stages of Gamma-Ray Bursts (GRBs).
The GACE has developed UBAT, the X-ray trigger detector for UFFO.
To see the launch: Link:
Observations of Magnetic Elements in the Quiet Sun InternetworkWe present here the analysis of high-resolution images of the quiet Sun at disk center taken with the Solar Optical Telescope (SOT) on board Hinode in the CN bandhead (388.35 nm) and magnetograms in the Mg I line (517.27 nm). These observations are complemented with data from the Swedish 1m Solar Telescope (SST). All data sets were obtained during the Hinode/Canary Islands joint campaign (HOP 0014) in September, 2007. In particular, we investigate the morphology, radiative and magnetic properties of small-scale elements in the solar atmosphere.
» Evidence of small-scale magnetic concentrations dragged by vortex motion of solar photospheric plasma
Vortex-type motions have been measured by tracking bright points in
high-resolution observations of the solar photosphere. These small-scale
motions are thought to be determinant in the evolution of magnetic footpoints
and their interaction with plasma and therefore likely to play a role in
heating the upper solar atmosphere by twisting magnetic flux tubes. We report
the observation of magnetic concentrations being dragged towards the center of
a convective vortex motion in the solar photosphere from high-resolution
ground-based and space-borne data.
Sunrise: instrument, mission, data and first results
The Sunrise balloon-borne solar observatory consists of a 1m aperture Gregory
telescope, a UV filter imager, an imaging vector polarimeter, an image
stabilization system and further infrastructure. The first science flight of
Sunrise yielded high-quality data that reveal the structure, dynamics and
evolution of solar convection, oscillations and magnetic fields at a resolution
of around 100 km in the quiet Sun. After a brief description of instruments and
data, first qualitative results are presented. In contrast to earlier
observations, we clearly see granulation at 214 nm.
SUNRISE/IMaX observations of convectively driven vortex flows in the Sun
We characterize the observational properties of the convectively driven
vortex flows recently discovered on the quiet Sun, using magnetograms,
Dopplergrams and images obtained with the 1-m balloon-borne Sunrise telescope.
By visual inspection of time series, we find some 3.1e-3 vortices/(Mm^2 min),
which is a factor of 1.7 larger than previous estimates. The mean duration of
the individual events turns out to be 7.9 min, with a standard deviation of 3.2
min. In addition, we find several events appearing at the same locations along
the duration of the time series (31.6 min).
Sunrise: instrument, mission, data and first resultsThe Sunrise balloon-borne solar observatory consists of a 1m aperture Gregory
telescope, a UV filter imager, an imaging vector polarimeter, an image
stabilization system and further infrastructure. The first science flight of
Sunrise yielded high-quality data that reveal the structure, dynamics and
evolution of solar convection, oscillations and magnetic fields at a resolution
of around 100 km in the quiet Sun. After a brief description of instruments and
data, first qualitative results are presented. In contrast to earlier
observations, we clearly see granulation at 214 nm.
SUNRISE/IMaX observations of convectively driven vortex flows in the SunWe characterize the observational properties of the convectively driven
vortex flows recently discovered on the quiet Sun, using magnetograms,
Dopplergrams and images obtained with the 1-m balloon-borne Sunrise telescope.
By visual inspection of time series, we find some 3.1e-3 vortices/(Mm^2 min),
which is a factor of 1.7 larger than previous estimates. The mean duration of
the individual events turns out to be 7.9 min, with a standard deviation of 3.2
min. In addition, we find several events appearing at the same locations along
the duration of the time series (31.6 min).
Evidence of small-scale magnetic concentrations dragged by vortex motion of solar photospheric plasmaVortex-type motions have been measured by tracking bright points in high-resolution observations of the solar photosphere. These small-scale motions are thought to be determinant in the evolution of magnetic footpoints and their interaction with plasma and therefore likely to play a role in heating the upper solar atmosphere by twisting magnetic flux tubes. We report the observation of magnetic concentrations being dragged towards the center of a convective vortex motion in the solar photosphere from high-resolution ground-based and space-borne data.
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