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| Paper: |
Atlas of the Solar Intensity Spectrum and its Center-to-Limb Variation |
| Volume: |
526, Solar Polarization Workshop 8 |
| Page: |
287 |
| Authors: |
Ramelli, R.; Setzer, M.; Engelhard, M.; Bianda, M.; Paglia, F.; Stenflo, J. O.; Küveler, G.; Plewe, R. |
| Abstract: |
The solar limb darkening function is well
known and is widely employed in models of the solar atmosphere.
However, there has been a lack of systematic spectrally resolved measurements.
Therefore we recently decided to start an observing campaign
with the Gregory-Coudé Telescope at IRSOL in Locarno in order to
produce a spectral atlas
obtained at 10 different heliocentric angles θ, chosen so that
μ = cos θ covers the interval from 0.1 to 1.0 in step of 0.1.
The measurements carried out till now include the spectral range from 439 nm
to 666 nm.
The collected data provide information about the
anisotropy of the emergent radiation field on the solar surface, allowing a
better modeling of the Second Solar Spectrum. In addition the data
give observational constraints that should be taken into account when
modeling the solar atmosphere. |
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