Speaker
Description
We analyze spectropolarimetric observations acquired with the SCIP instrument in the near-infrared spectral window CH1 around 850 nm. This wavelength range contains a total of 12 spectral lines sampling different layers of the solar atmosphere. In this work, we focus on a subset of seven Fe and Ca lines, spanning photospheric, upper-photospheric, and chromospheric heights, including the Ca II 854.2 nm and Ca II 849.8 nm lines. We perform simultaneous multi-line full-Stokes inversions using the NLTE DeSIRe inversion code. The inversion strategy takes into account the spectral PSF, computed specifically for these SCIP observations, and includes an unpolarized stray light correction of the spectral profiles, which improves the quality of the fits. We carried out multiple inversion cycles with up to 11 nodes in optical depth and included spatial straylight correction in the modeling, resulting in good fits and a reliable inference of the height-dependent atmospheric parameters.
Our analysis focuses on an emerging flux region containing pores, observed in four consecutive SCIP maps. This allows us to investigate both the vertical structure and the temporal evolution of the magnetic field in pores. The inferred stratification shows a clear expansion of the magnetic field with height, as represented as a function of optical depth. TuMag images are used for context.
The results show the potential of combining multiple spectral lines in the 850 nm wavelength range and demonstrate the capabilities of multi-line inversion techniques to study the vertical and temporal evolution of solar magnetic fields.