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Spectropolarimetric observations of the solar atmosphere in the H alpha 6563 angstrom line

The result's identifiers

  • Result code in IS VaVaI

    <a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985815%3A_____%2F22%3A00556498" target="_blank" >RIV/67985815:_____/22:00556498 - isvavai.cz</a>

  • Result on the web

    <a href="https://doi.org/10.1051/0004-6361/202141834" target="_blank" >https://doi.org/10.1051/0004-6361/202141834</a>

  • DOI - Digital Object Identifier

    <a href="http://dx.doi.org/10.1051/0004-6361/202141834" target="_blank" >10.1051/0004-6361/202141834</a>

Alternative languages

  • Result language

    angličtina

  • Original language name

    Spectropolarimetric observations of the solar atmosphere in the H alpha 6563 angstrom line

  • Original language description

    We present novel spectropolarimetric observations of the hydrogen H alpha line taken with the Zurich Imaging Polarimeter (ZIMPOL) at the Gregory Coude Telescope of the Istituto Ricerche Solari Locarno (IRSOL). The linear polarization is clearly dominated by the scattering of anisotropic radiation and the Hanle effect, while the circular polarization is dominated by the Zeeman effect. The observed linear polarization signals show a rich spatial variability, the interpretation of which would open a new window for probing the solar chromosphere. We study their spatial variation within coronal holes, finding a different behaviour for the U/I signals near the north and south solar poles. We identify some spatial patterns, which may facilitate the interpretation of the observations. In close-to-the-limb regions with sizable circular polarization signals, we find similar asymmetric Q/I profiles. We also show examples of net circular polarization profiles (NCP), along with the corresponding linear polarization signals. The application of the weak field approximation to the observed circular polarization signals gives 10 G (40-60 G) close to the limb quiet (plage) regions for the average longitudinal field strength over the spatio-temporal resolution element.

  • Czech name

  • Czech description

Classification

  • Type

    J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database

  • CEP classification

  • OECD FORD branch

    10308 - Astronomy (including astrophysics,space science)

Result continuities

  • Project

    <a href="/en/project/GA19-20632S" target="_blank" >GA19-20632S: Forward modeling and inversion of polarized solar spectra in multi-dimensional geometries</a><br>

  • Continuities

    I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Others

  • Publication year

    2022

  • Confidentiality

    S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Data specific for result type

  • Name of the periodical

    Astronomy & Astrophysics

  • ISSN

    0004-6361

  • e-ISSN

    1432-0746

  • Volume of the periodical

    659

  • Issue of the periodical within the volume

    March

  • Country of publishing house

    FR - FRANCE

  • Number of pages

    16

  • Pages from-to

    A179

  • UT code for WoS article

    000773023600009

  • EID of the result in the Scopus database

    2-s2.0-85127386308