Estrellas tempranas deficientes de helio
Attention is called upon a group of stars in which the spectral types and the photoelectric colors disagree, the colors being too blue for the spectral types. Although a certain number of these objects is well known -the peculiar stars of the so called ”λ4200" group- the authors found a number...
Guardado en:
| Autores principales: | , , |
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| Formato: | Articulo Comunicacion |
| Lenguaje: | Español |
| Publicado: |
1969
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| Materias: | |
| Acceso en línea: | http://sedici.unlp.edu.ar/handle/10915/94472 |
| Aporte de: |
| Sumario: | Attention is called upon a group of stars in which the spectral types and the photoelectric colors disagree, the colors being too blue for the spectral types. Although a certain number of these objects is well known -the peculiar stars of the so called ”λ4200" group- the authors found a number of additional stars definitely not peculiar but exhibiting a too blue color. The objects observed so far from La Plata can be divided into two groups whose common characteristics are the weak He I lines, corresponding to a later type (B8) than their colors indicate (B5), and whose differences consist in the strength of the C II lines. In one group, CII is normal for the colors, while in the other group it is normal for the strength of the He I lines. More objects of this group are being observed. |
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