15 research outputs found
Operculina from the northwestern Pacific (Sesoko Island, Japan) Species Differentiation, Population Dynamics, Growth and Development.
Palaeonummulites venosus: Natural growth rates and quantification by means of CT investigation.
Determination of longevities, chamber building rates and growth functions for Operculina complanata from long term cultivation experiments
Evaluating the quality of a long term cultivation experiment of Operculina complanata by comparison with the natural labora\uadtory approach.
Heterostegina depressa growth model: what does cell volume tell us about biogeography and ecology?
Oscillatory growth in Larger Benthic Foraminifera: problems, interpretations and possible solutions
DKIST unveils the serpentine topology of quiet Sun magnetism in the photosphere
We present the first quiet Sun spectropolarimetric observations obtained with
the Visible SpectroPolarimeter (ViSP) at the m Daniel K. Inouye Solar
Telescope (DKIST). We recorded observations in a wavelength range that includes
the magnetically sensitive Fe I doublet. With an
estimated spatial resolution of 0.08'', this represents the highest spatial
resolution full-vector spectropolarimetric observations ever obtained of the
quiet Sun. We identified small-scale magnetic elements, including
magnetic loops and unipolar magnetic patches, with linear and circular
polarisation detected in all of them. Of particular interest is a magnetic
element in which the polarity of the magnetic vector appears to change three
times in only km and which has linear polarisation signals throughout. We
find complex Stokes profiles at the polarity inversion lines of magnetic
loops and discover degenerate solutions, as we are unable to conclusively
determine whether these arise due to gradients in the atmospheric parameters or
smearing of opposite polarity signals. We analyse a granule which notably has
linear and circular polarisation signals throughout, providing an opportunity
to explore its magnetic properties. On this small scale we see the magnetic
field strength range from G at the granular boundary to kG in the
intergranular lane (IGL), and sanity check the values with the weak and strong
field approximations. A value of kG in the IGL is among the highest
measurements ever recorded for the internetwork.Comment: Accepted for publication in ApJ