Journal
ASTROPHYSICAL JOURNAL
Volume 780, Issue 1, Pages -Publisher
IOP PUBLISHING LTD
DOI: 10.1088/0004-637X/780/1/109
Keywords
line: formation; line: profiles; methods: data analysis; radiative transfer; Sun: atmosphere
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Funding
- National Research Foundation of Korea [NRF-2011-0028102, NRF-2012R1A2A1A03670387]
- National Research Foundation of Korea [2012R1A2A1A03670387] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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We propose a generalization of Becker's cloud model (BCM): an embedded cloud model (ECM)-for the inversion of the core of the H alpha line spectrum of a plasma feature either lying high above the forest of chromospheric features or partly embedded in the outermost part of this forest. The fundamental assumption of the ECM is that the background light incident on the bottom of the feature from below is equal to the ensemble-average light at the same height. This light is related to the observed ensemble-average light via the radiative transfer that is described by the four parameters newly introduced in addition to the original four parameters of the BCM. Three of these new parameters are independently determined from the observed rms contrast profile of the ensemble. We use the constrained chi(2) fitting technique to determine the five free parameters. We find that the ECM leads to the fairly good fitting of the observed line profiles and the reasonable inference of physical parameters in quiet regions where the BCM cannot. Our first application of this model to a quiet region of the Sun indicates that the model can produce the complete velocity map and Doppler width map of the region.
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