| Presenter: | David Orozco Suárez |
| Affiliation: | Instituto de Astrofísica de Andalucía (CSIC) |
| Title: | Diagnostic potential of the Fe~{\sc{i}} 630.2~nm lines for high-spatial resolution studies of internetwork magnetic fields |
| Authors: | D. Orozco Su\'arez, L.R. Bellot Rubio, J.C. del Toro Iniesta |
| Form: | poster |
| Abstract: | We investigate whether or not the real distribution of field strengths in quiet Sun internetwork (IN) regions can be derived from very high spatial resolution spectropolarimetric measurements in the visible. Current analyses of IN regions based on visible and infrared neutral iron lines indicate the presence of either kG or hG field strengths, respectively. To shed some light on this controversy we use radiative magneto-convection simulations to synthesize the four Stokes profiles of the Fe~{\sc{i}} 630.2~nm lines. We degrade the profiles to a spatial resolution of 0.32 arcsec and add noise, in an attempt to simulate the observations of the spectropolarimeter aboard HINODE. Once the profiles are degraded we infer the atmospheric parameters by means of simple one-component Milne-Eddington inversions. The comparison of the derived and real parameters indicates that the visible lines yield correct IN field strengths and magnetic fluxes, with uncertainties smaller than $\sim$150~G, when a stray light contamination factor is included in the inversion. In particular, weak fields are retrieved wherever the field is weak in the simulation. |
| Session: | 4. Polarized radiative transfer, theory and modeling |
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