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High velocity outflow from η Carinae

DAMINELI NETO, A ; VIOTTI, R ; BARATTA, G. B ; DE ARAUJO, F. X

Astronomy and astrophysics (Berlin), 1993-02, Vol.268 (1), p.183-186 [Periódico revisado por pares]

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Título:
High velocity outflow from η Carinae
Autor: DAMINELI NETO, A ; VIOTTI, R ; BARATTA, G. B ; DE ARAUJO, F. X
Assuntos: Astronomy ; Earth, ocean, space ; Exact sciences and technology ; Normal stars (by class): general or individual ; Stars ; Supergiant stars
É parte de: Astronomy and astrophysics (Berlin), 1993-02, Vol.268 (1), p.183-186
Notas: ObjectType-Article-2
SourceType-Scholarly Journals-1
ObjectType-Feature-1
content type line 23
Descrição: We present new high resolution observations of the intense He I 1083 micron emission line in Eta Car, and compare with the H-alpha and P-gamma profiles. The line is characterized by a very strong emission peak, split into two components by a central absorption, and by two high velocity absorption lines at -590 and -1040 km/s. The latter is in agreement with the general expansion rate of the circumstellar nebula, and suggests that part of the stellar wind of Eta Car is presently accelerated up to velocities similar to those of the matter ejected by the star during the bright phases of the last century. The results are discussed in the framework of the continuous mass outflow model.
Editor: Les Ulis: EDP Sciences
Idioma: Inglês

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