Počet záznamů: 1  

Prominence Visibility in Hinode/XRT Images

  1. 1.
    0450549 - ASÚ 2016 RIV US eng J - Článek v odborném periodiku
    Schwartz, P. - Jejčič, S. - Heinzel, Petr - Anzer, U. - Jibben, P.R.
    Prominence Visibility in Hinode/XRT Images.
    Astrophysical Journal. Roč. 807, č. 1 (2015), 97/1-97/9. ISSN 0004-637X. E-ISSN 1538-4357
    Grant CEP: GA ČR GAP209/12/0906
    Grant ostatní: SAV(SK) VEGA 2/0108/12
    Institucionální podpora: RVO:67985815
    Klíčová slova: Sun * corona * Sun filaments
    Kód oboru RIV: BN - Astronomie a nebeská mechanika, astrofyzika
    Impakt faktor: 5.909, rok: 2015

    In this paper we study the soft X-ray. (SXR) signatures of one particular prominence. The X-ray observations used here were made by the Hinode/X-Ray Telescope instrument using two different filters. Both of them have a pronounced peak of the response function around 10 angstrom. One of them has a secondary smaller peak around 170 angstrom, which leads to a contamination of SXR images. The observed darkening in both of these filters has a very large vertical extension. The position and shape of the darkening correspond. nicely with the prominence structure seen in SDO/AIA images. First, we have investigated the possibility that the darkening is caused by X-ray absorption. However, detailed calculations of the optical thickness in this spectral range show clearly that this effect is completely negligible. Therefore, the alternative is the presence of an extended region with a large emissivity deficit, which can be caused by the presence of cool prominence plasmas within an otherwise hot corona. To reproduce the observed darkening, one needs a very large extension along the line. of. sight of the region amounting to around 105 km. We interpret this region as the prominence spine, which is also consistent with SDO/AIA observations in EUV.
    Trvalý link: http://hdl.handle.net/11104/0251856

     
     
Počet záznamů: 1  

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