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Structure of a simple sunspot from the inversion of IR spectral data
Author(s) -
Mathew S.K.,
Solanki S.K.,
Lagg A.,
Collados M.,
Berdyugina S.V.,
Frutiger C.,
Krupp N.,
Woch J.
Publication year - 2003
Publication title -
astronomische nachrichten
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.394
H-Index - 63
eISSN - 1521-3994
pISSN - 0004-6337
DOI - 10.1002/asna.200310139
Subject(s) - sunspot , inversion (geology) , physics , azimuth , magnetic field , line of sight , infrared , computational physics , astrophysics , optics , meteorology , geology , quantum mechanics , paleontology , structural basin
Analysis of spectral data of two neighboring infrared lines, Fe I 15648.5 Å ( g = 3) and FeI 15652.9 Å ( g eff = 1.53) are carried out for a simple sunspot when it was near the solar disk center ( μ = 0.92), to understand the basic structure of sunspot magnetic field. Inversions of Stokes profiles are carried out to derive different atmospheric parameters both as a function of location within the sunspot and height in the atmosphere. As a result of the inversion we have obtained maps of magnetic field strength, temperature, line‐of‐sight velocity, field inclination and azimuth for different optical depth layers between log( τ 5 ) = 0 and log( τ 5 ) = –2.0. In this paper we present few results from our inversion for a layer averaged between log( τ 5 ) from 0.0 to –0.5.