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.
Original language | English (US) |
---|---|
Pages (from-to) | 105-116 |
Number of pages | 12 |
Journal | Solar Physics |
Volume | 288 |
Issue number | 1 |
DOIs | |
State | Published - Nov 2013 |
All Science Journal Classification (ASJC) codes
- Astronomy and Astrophysics
- Space and Planetary Science
Keywords
- Chromosphere, quiet
- Heating, chromospheric
- Prominences, quiescent
- Spectral line, broadening