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| Paper: |
The Sunspot Penumbra in the Photosphere: Results from Forward Synthesized Spectroscopy |
| Volume: |
463, 2nd ATST-EAST Workshop in Solar Physics: Magnetic Fields from the Photosphere to the Corona |
| Page: |
89 |
| Authors: |
Tritschler, A.; Uitenbroek, H.; Rempel, M. |
| Abstract: |
We present first results from a spectral synthesis of the
Zeeman-insensitive Fe 1 557.6 nm line for two different viewing angles (0° and 30°)
using numerical simulations of a sunspot as an input model. We performed a
bisector analysis to calculate two-dimensional maps of line-of-sight Doppler velocities
and the line width. We analyze azimuthal cuts of the LOS
velocity at different penumbral radii and calculate
the radial behavior of azimuthal averages of line width and intensity.
Both are compared with observational results. The properties of dark cores in penumbral
filaments are discussed briefly. Within the limitations of this study,
we find that the results from the forward synthesized spectroscopy are in good agreement
with the observations, corroborating that the photospheric structure and dynamics
of the penumbra is a signature of overturning anisotropic magneto-convection. |
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