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Title: Effect of cross-redistribution on the resonance scattering polarization of O I line at 1302 Å

Oxygen is the most abundant element on the Sun after hydrogen and helium. The intensity spectrum of resonance lines of neutral oxygen, namely, O I (1302, 1305, and 1306 Å), has been studied in the literature for chromospheric diagnostics. In this paper, we study the resonance scattering polarization in the O I line at 1302 Å using two-dimensional (2D) radiative transfer in a composite atmosphere constructed using a 2D magneto-hydrodynamical snapshot in the photosphere and columns of the one-dimensional FALC atmosphere in the chromosphere. The methods developed by us recently in a series of papers to solve multi-dimensional polarized radiative transfer have been incorporated in our new code POLY2D, which we use for our analysis. We find that multi-dimensional radiative transfer including XRD effects is important in reproducing the amplitude and shape of scattering polarization signals of the O I line at 1302 Å.
Authors:
 [1] ;  [2] ;  [3]
  1. Max Planck Institute for Solar System Research, Justus-von-Liebig-Weg 3, D-37077 Göttingen (Germany)
  2. Indian Institute of Astrophysics, Koramangala, 2nd Block, Bangalore 560 034 (India)
  3. National Solar Observatory, P.O. Box 62, Sunspot, NM 88349 (United States)
Publication Date:
OSTI Identifier:
22370505
Resource Type:
Journal Article
Resource Relation:
Journal Name: Astrophysical Journal; Journal Volume: 794; Journal Issue: 1; Other Information: Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
79 ASTROPHYSICS, COSMOLOGY AND ASTRONOMY; AMPLITUDES; CHROMOSPHERE; HELIUM; HYDROGEN; MAGNETIC FIELDS; OXYGEN; PHOTOSPHERE; POLARIZATION; RADIANT HEAT TRANSFER; RESCATTERING; RESONANCE SCATTERING; SPECTRA; SUN; TWO-DIMENSIONAL CALCULATIONS; X-RAY DIFFRACTION