CHROMOSPHERIC POLARIZATION IN THE PHOTOSPHERIC SOLAR OXYGEN INFRARED TRIPLET

Journal Article · Mon Jul 20 04:00:00 EDT 2015 · Astrophysical Journal Letters

DOI:https://doi.org/10.1088/2041-8205/808/1/L13· OSTI ID:22518929

Del Pino Alemán, Tanausú; Trujillo Bueno, Javier ^[1]

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1. Instituto de Astrofísica de Canarias, E-38205 La Laguna, Tenerife (Spain)

We present multilevel radiative transfer modeling of the scattering polarization observed in the solar O i infrared triplet around 777 nm. We demonstrate that the scattering polarization pattern observed on the solar disk forms in the chromosphere, far above the photospheric region where the bulk of the emergent intensity profiles originate. We investigate the sensitivity of the polarization pattern to the thermal structure of the solar atmosphere and to the presence of weak magnetic fields (10{sup −2}–100 G) through the Hanle effect, showing that the scattering polarization signals of the oxygen infrared triplet encode information on the magnetism of the solar chromosphere.

• OSTI ID: 22518929
• Journal Information: Astrophysical Journal Letters, Journal Name: Astrophysical Journal Letters Journal Issue: 1 Vol. 808; ISSN 2041-8205
• Country of Publication: United States
• Language: English

Related Subjects

79 ASTRONOMY AND ASTROPHYSICS
CHROMOSPHERE
INFRARED SPECTRA
MAGNETIC FIELDS
MAGNETISM
OXYGEN
PHOTOSPHERE
POLARIZATION
RADIANT HEAT TRANSFER
SCATTERING
SENSITIVITY
SUN
TRIPLETS