| タイトル | Acoustic heating of the chromosphere and cool corona in the F star alpha Canis Minoris (Procyon) |
| 著者（英） | Mullan, D. J.; Cheng, Q. Q. |
| 著者所属（英） | NASA Headquarters |
| 発行日 | 1994-11-01 |
| 言語 | eng |
| 内容記述 | We report on a hydrodynamical model of acoustic wave energy deposition in the atmosphere of the F star Procyon. The model treats radiative losses in the photosphere by solving the continuum radiative transfer (RT) problem; it treats radiative losses in the chromosphere by solving the RT equation in two representative strong lines (Mg II k and Lyman alpha); and it includes optically thin emission from the corona. We find a temperature minimum of 4440 K and a transition region at a height of 3500-4000 km above the photosphere. Our acoustic model accounts for the reported fluxes of Mg II and Lyman alpha emission lines, as well as for the X-ray flux from the cool (T less than 1 MK) coronal component reported by Lemen et al. (1989). The differential emission measure distribution in our model agrees quite well with empirical results of Jordan et al. (1986). |
| NASA分類 | ASTROPHYSICS |
| レポートNO | 95A68072 |
| 権利 | Copyright |
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