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Browsing by Author "Bianda, M"

Browsing by Author "Bianda, M"

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  • Linear Polarization of the Solar Ca I 4227 Å Line: Modeling with Radiative Transfer and Last Scattering Approximation 
    Anusha, L. S; Stenflo, J. O; Frisch, H; Bianda, M; Holzreuter, R; Nagendra, K. N; Sampoorna, M; Ramelli, R (Astronomical Society of the Pacific, 2011-04)
    To model the Ca I 4227 Å line polarization, radiative transfer effects with partial frequency redistribution (PRD) must be taken into account. The numerical solution of the relevant polarized radiative transfer (RT) equations ...
  • Observations of the forward scattering Hanle effect in the Ca I  4227 Å  line 
    Bianda, M; Ramelli, R; Anusha, L. S; Stenflo, J. O; Nagendra, K. N; Holzreuter, R; Sampoorna, M; Frisch, H; Smitha, H. N (EDP Sciences, 2011-06)
    Chromospheric magnetic fields are notoriously difficult to measure. The chromospheric lines are broad, while the fields are producing a minuscule Zeeman-effect polarization. A promising diagnostic alternative is provided ...
  • Observations of the Solar Ca I 4227 Å Line 
    Bianda, M; Ramelli, R; Stenflo, J. O; Anusha, L. S; Nagendra, K. N; Sampoorna, M; Holzreuter, R; Frisch, H (Astronomical Society of the Pacific, 2011-04)
    Our aim is to understand some interesting polarization features observed in the solar Ca I 4277 Å line. Here we only discuss the observational aspects. Observations have also been made in other chromospheric lines within ...
  • Origin of spatial variations of scattering polarization in the wings of the Ca I 4227 Å line 
    Sampoorna, M; Stenflo, J. O; Nagendra, K. N; Bianda, M; Ramelli, R; Anusha, L. S (The American Astronomical Society, 2009-07-10)
    Polarization that is produced by coherent scattering can be modified by magnetic fields via the Hanle effect. This has opened a window to explorations of solar magnetism in parameter domains not accessible to the Zeeman ...
  • The Quantum Interference Effects in the Sc II 4247 Å Line of the Second Solar Spectrum 
    Smitha, H. N; Nagendra, K. N; Stenflo, J. O; Bianda, M; Ramelli, R (IOP Publishing, 2014-10-10)
    The Sc II 4247 Å line formed in the chromosphere is one of the lines well known, like the Na I D2 and Ba II D2, for its prominent triple-peak structure in Q/I and the underlying quantum interference effects governing it. ...

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