Simultaneous Spectropolarimetric Observations in the Hα and Ca II 8662 Å Lines of an Active Region
Abstract
We present spectropolarimetric observations of an active region recorded simultaneously in the Hα and the Ca II 8662 Å lines. The sunspot exhibits multiple structures, including a light bridge and a region where the Ca II 8662 Å line core is in emission. Correspondingly, the Hα line core image displays brightening in the emission region, with the spectral profiles showing elevated line cores. The stratification of the line-of-sight magnetic field is inferred through nonlocal thermodynamic equilibrium multiline inversions of the Ca II 8662 Å line and the weak field approximation (WFA) over the Hα line. The field strength inferred from the Hα line core is consistently smaller than that inferred from inversions at
- Publication:
-
The Astrophysical Journal
- Pub Date:
- August 2024
- DOI:
- 10.3847/1538-4357/ad54ba
- arXiv:
- arXiv:2406.02083
- Bibcode:
- 2024ApJ...971...30M
- Keywords:
-
- Solar photosphere;
- Solar chromosphere;
- Solar magnetic fields;
- 1518;
- 1479;
- 1503;
- Astrophysics - Solar and Stellar Astrophysics
- E-Print:
- accepted to be published in ApJ on 4th June, 2024, 14 pages, 7 figures