Comparison of UV spectra from solar-type stars
โ Scribed by A. Greve; W. Wamsteker
- Publisher
- Springer
- Year
- 1984
- Tongue
- English
- Weight
- 415 KB
- Volume
- 94
- Category
- Article
- ISSN
- 0038-0938
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โฆ Synopsis
We compare high-resolution spectra from the Sun and the four solar-type stars 16 CygA, 16 Cyg B, HD 32008, HD 34411 obtained with IUE in the wavelength range 2650-2930 A. The comparison is made for peak intensities between absorption lines. At the level of accuracy of the IUE observations, the stars 16 Cyg A, 16 Cyg B, HD 34411 are indistinguishable from the Sun, in particular the MgI! resonance line profiles are identical. HD 32008 is not a solar analog but is evidently of late G to early K spectral type. * Based on observations with the International Ultraviolet Explorer collected at the Villafranca Satellite Tracking Station of the European Space Agency.
๐ SIMILAR VOLUMES
Winds are directly detected from solar-type stars only when they are very young. At ages ~ 106 yr, these stars have mass loss rates ~ 106 times the mass flux of the present solar wind. Although these young T Tauri stars exhibit ultraviolet transition-region and X-ray coronal emission, the large part