| タイトル | Ultraviolet observations of tau/4/ Serpentis /M5 IIb - IIIa/ |
| 著者（英） | Hobbs, R. W.; Kafatos, M.; Feibelman, W. A.; Michalitsianos, A. G. |
| 著者所属（英） | George Mason Univ.|NASA Goddard Space Flight Center |
| 発行日 | 1981-01-01 |
| 言語 | eng |
| 内容記述 | IUE data of this late giant reveal strong Mg II resonance doublet emission that in high dispersion exhibits reversed symmetric h and k line profile emission, suggesting that material ejected from the surface forms a low excitation expanding circumstellar shell. The weak continuum is identified as being a combination of possibly stellar continuum and blended Fe II features of multiplets. The UV spectra does not suggest the presence of a hot companion as believed to exist in symbiotic stars, because a number of high excitation lines such as C IV and He II are not observed in the short wavelength range. The UV and Mg II line emission is most likely the result of the M giant having undergone an eruptive event in which a moderate excitation shell heated by hydromagnetic shocks dominates the UV emission. The general properties of the circumstellar shell are obtained from the Mg II line profiles. |
| NASA分類 | ASTROPHYSICS |
| レポートNO | 82A33803 |
| 権利 | Copyright |
| URI | https://repository.exst.jaxa.jp/dspace/handle/a-is/410357 |
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