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Understanding the HMI Pseudocontinuum in White-light Solar Flares

The result's identifiers

  • Result code in IS VaVaI

    <a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985815%3A_____%2F18%3A00495487" target="_blank" >RIV/67985815:_____/18:00495487 - isvavai.cz</a>

  • Result on the web

    <a href="http://dx.doi.org/10.3847/1538-4357/aac3e4" target="_blank" >http://dx.doi.org/10.3847/1538-4357/aac3e4</a>

  • DOI - Digital Object Identifier

    <a href="http://dx.doi.org/10.3847/1538-4357/aac3e4" target="_blank" >10.3847/1538-4357/aac3e4</a>

Alternative languages

  • Result language

    angličtina

  • Original language name

    Understanding the HMI Pseudocontinuum in White-light Solar Flares

  • Original language description

    We analyze observations of the X9.3 solar flare (SOL2017-09-06T11:53) observed by SDO/HMI and Hinode/Solar Optical Telescope. Our aim is to learn about the nature of the HMI pseudocontinuum I-c used as a proxy for the white-light continuum. From model atmospheres retrieved by an inversion code applied to the Stokes profiles observed by the Hinode satellite, we synthesize profiles of the FeI 617.3 nm line and compare them to HMI observations. Based on a pixel-by-pixel comparison, we show that the value of I-c represents the continuum level well in quiet-Sun regions only. In magnetized regions, it suffers from a simplistic algorithm that is applied to a complex line shape. During this flare, both instruments also registered emission profiles in the flare ribbons. Such emission profiles are poorly represented by the six spectral points of HMI and the MDI-like algorithm does not account for emission profiles in general, thus, the derived pseudocontinuum intensity does not approximate the continuum value properly.

  • 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

    Result was created during the realization of more than one project. More information in the Projects tab.

  • Continuities

    P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Others

  • Publication year

    2018

  • Confidentiality

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

Data specific for result type

  • Name of the periodical

    Astrophysical Journal

  • ISSN

    1538-4357

  • e-ISSN

  • Volume of the periodical

    860

  • Issue of the periodical within the volume

    2

  • Country of publishing house

    US - UNITED STATES

  • Number of pages

    9

  • Pages from-to

  • UT code for WoS article

    000436072400006

  • EID of the result in the Scopus database

    2-s2.0-85049225362