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Temperature of Solar Prominences Obtained with the Fast Imaging Solar Spectrograph on the 1.6 m New Solar Telescope at the Big Bear Solar Observatory

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Abstract

We observed solar prominences with the Fast Imaging Solar Spectrograph (FISS) at the Big Bear Solar Observatory on 30 June 2010 and 15 August 2011. To determine the temperature of the prominence material, we applied a nonlinear least-squares fitting of the radiative transfer model. From the Doppler broadening of the Hα and Ca ii lines, we determined the temperature and nonthermal velocity separately. The ranges of temperature and nonthermal velocity were 4000 – 20 000 K and 4 – 11 km s−1. We also found that the temperature varied much from point to point within one prominence.

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Acknowledgements

This work was supported by the National Research Foundation of Korea (KRF-2008-220-C00022) and by the Development of Korean Space Weather Center, a project of KASI.

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Correspondence to Hyungmin Park.

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Initial Results from FISS

Guest Editor: Jongchul Chae

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Park, H., Chae, J., Song, D. et al. Temperature of Solar Prominences Obtained with the Fast Imaging Solar Spectrograph on the 1.6 m New Solar Telescope at the Big Bear Solar Observatory. Sol Phys 288, 105–116 (2013). https://doi.org/10.1007/s11207-013-0271-2

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  • DOI: https://doi.org/10.1007/s11207-013-0271-2

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