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Observations on spatial variations of the Sr~{\sc i} 4607~Å~scattering polarization signals at different limb distances with ZIMPOL
Sajal Kumar Dhara, Emilia Capozzi, Daniel Gisler +5
The Sr~{\sc i} 4607~Å spectral line shows one of the strongest scattering polarization signals in the visible solar spectrum. The amplitude of this polarization signal is expected…
Spatial variations of the SrI 4607Åscattering polarization signals at subgranular scale observed with ZIMPOL at GREGOR telescope
Sajal Kumar Dhara, Emilia Capozzi, Daniel Gisler +5
Sr I 4607Åspectral line shows one of the strongest scattering polarization signals in the visible solar spectrum. The amplitudes of these signals are expected to vary at granular s…
Spatial variations of the Sr i 4607 Å scattering polarization peak
M. Bianda, S. Berdyugina, D. Gisler +5
Context. The scattering polarization signal observed in the photospheric Sr i 4607 Å line is expected to vary at granular spatial scales. This variation can be due to changes in th…
SPHERE / ZIMPOL observations of the symbiotic system R Aqr. I. Imaging of the stellar binary and the innermost jet clouds
H. M. Schmid, A. Bazzon, J. Milli +40
R Aqr is a symbiotic binary system consisting of a mira variable, a hot companion with a spectacular jet outflow, and an extended emission line nebula. We have used R Aqr as test t…
Observing the Second Solar Spectrum at IRSOL
M. Bianda, R. Ramelli, D. Gisler
The history of the IRSOL observatory is closely related to Second Solar Spectrum observations. Already in 1963 Brueckner observed scattering polarization in the CaI 4227A line. In…