Spectral synthesis in a magnetic field

Details Spectral synthesis in a magnetic field Spectral synthesis in a magnetic field

Jan 1977

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1977a%26a....54..175w&link_type=abstract

Astronomy and Astrophysics, vol. 54, no. 1, Jan. 1977, p. 175-181. Deutsche Forschungsgemeinschaft

Astronomy and Astrophysics

Astrophysics

4

Line Spectra, Magnetic Fields, Solar Spectra, Spectrum Analysis, Stellar Atmospheres, Thermodynamic Equilibrium, Atomic Energy Levels, Solar Magnetic Field, Stellar Magnetic Fields, Sunspots, Umbras, Velocity Distribution, Zeeman Effect

Scientific paper

A numerical technique is described which performs LTE spectral synthesis for arbitrary stellar atmospheres with magnetic fields, macroscopic velocity fields, and any number of contributing atomic transitions with arbitrary Zeeman splitting. With the technique, a section of the solar spectrum (5249.3 A-5252.5 A) has been synthesized for both the photosphere (nonmagnetic case) and a sunspot umbra (magnetic-field case). The computed spectra are compared with observed spectra. Some questionable line identifications are discussed, and new identifications are given for 12 spectral lines. The behavior of the magnetograph line Fe I 5250.21 A as well as magnetooptical effects in the synthesized umbral spectrum are also investigated.

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