On the validity of the 630 nm Fe I lines for magnetometry of the internetwork quiet Sun

Bibcode
2006A&A...456.1159M
DOI
10.1051/0004-6361:20065008
Martínez González, M. J.; Collados, M.; Ruiz Cobo, B.
Referencia bibliográfica

Astronomy and Astrophysics, Volume 456, Issue 3, September IV 2006, pp.1159-1164

Fecha de publicación:
9
2006
Revista
Astronomy and Astrophysics
Número de autores
3
Número de autores del IAC
3
Número de citas
78
Número de citas referidas
60
Descripción
Aims.The purpose of this work is to analyze the reliability of the magnetic field strengths inferred from the 630 nm pair of Fe i lines in internetwork quiet Sun regions. Methods: .Some numerical experiments have been performed that demonstrate the inability of these lines to recover the magnetic field strength in such low flux solar regions. Results: .It is shown how different model atmospheres, with magnetic field strengths ranging from a few hundred Gauss to kiloGauss, give rise to Stokes profiles that cannot be distinguished. The reasons for this degeneracy are discussed.
Tipo
Con árbitro
Campos magnéticos

Te puede interesar

  • Con árbitro
    Radial gradients of CO absorptions and abundance ratios in the bulge of M31
    We present new H- and K-band spectroscopy for the bulge of M31, taken with the LUCI spectrograph at the Large Binocular Telescope (LBT). We studied radial trends of CO absorption features (namely, CO1.58, CO1.60, CO1.64, CO1.66, CO1.68, CO2.30, CO2.32, and CO2.35) in the bulge of M31, out to a galactocentric distance of ∼100″ (∼380 pc). We find
    La Barbera, F. et al.

    Fecha de publicación:

    7
    2024
    Bibcode
    2024A&A...687A.156L
    Número de citas
    0
  • Con árbitro
    A 20 kiloparsec bipolar Lyman α outflow from a radio galaxy at z = 2.95
    The study of ionized gas kinematics in high-z active galaxies plays a key part in our understanding of galactic evolution, in an age where nuclear activity was widespread and star formation close to its peak. We present a study of TXS 0952−217, a radio galaxy at z = 2.95, using VLT/MUSE integral field optical spectroscopy as part of a project aimed
    Coloma Puga, M. et al.

    Fecha de publicación:

    6
    2024
    Bibcode
    2024A&A...686A.220C
    Número de citas
    0
  • Con árbitro
    Chronology of our Galaxy from Gaia colour-magnitude diagram fitting (ChronoGal). I. The formation and evolution of the thin disc from the Gaia Catalogue of Nearby Stars
    Context. The study of the Milky Way is living a golden era thanks to the enormous high-quality datasets delivered by Gaia, and space asteroseismic and ground-based spectroscopic surveys. However, the current major challenge to reconstructing the chronology of the Milky Way is the difficulty to derive precise stellar ages for large samples of stars
    Gallart, Carme et al.

    Fecha de publicación:

    7
    2024
    Bibcode
    2024A&A...687A.168G
    Número de citas
    0