Detection of emission in the Si I 1082.7 nm line core in sunspot umbrae

Author： Orozco Suárez D.   Quintero Noda C.   Ruiz Cobo B.   Collados Vera M.   Felipe T.  

Publisher： Edp Sciences

E-ISSN： 1432-0746|607|issue|A102-A102

ISSN： 0004-6361

Source： Astronomy & Astrophysics, Vol.607, Iss.issue, 2017-11, pp. : A102-A102

Disclaimer: Any content in publications that violate the sovereignty, the constitution or regulations of the PRC is not accepted or approved by CNPIEC.

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Abstract

Context. Determining empirical atmospheric models for the solar chromosphere is difficult since it requires the observation and analysis of spectral lines that are affected by non-local thermodynamic equilibrium (NLTE) effects. This task is especially difficult in sunspot umbrae because of lower continuum intensity values in these regions with respect to the surrounding brighter granulation. Umbral data is therefore more strongly affected by the noise and by the so-called scattered light, among other effects.

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