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Search for HI Bubbles Around WR Stars: WR 149

Published online by Cambridge University Press:  25 May 2016

C. Cappa de Nicolau ,
V.S. Niemela ,
U. Herbstmeier  and
B. Koribalski
C. Cappa de Nicolau
Affiliation:
Member of Carrera del Investigador, CONICET IAR, CC 5, 1894 Villa Elisa FCAGLP, Paseo del Bosque, 1900 La Plata, Argentina
V.S. Niemela
Affiliation:
Member of Carrera del Investigador, CIC, Prov. Buenos Aires IAFE, CC 67, 1428 Buenos Aires, Argentina
U. Herbstmeier
Affiliation:
MPIfA, Königstuhl, D-6900 Heidelberg, Germany
B. Koribalski
Affiliation:
MPIfR, Auf dem Hügel 69, D-53121, Bonn, Germany

Extract

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The interaction of strong stellar winds with the interstellar medium creates large cavities or interstellar bubbles surrounded by expanding outer shells. 21-cm line (HI) observations have revealed the presence of such neutral gas bubbles around several WR stars (e.g. Niemela & Cappa de Nicolau 1991 and references therein; Dubner et al. 1992).

Continuing our search for HI bubbles around WR stars, we have analyzed the neutral hydrogen distribution in the vicinity of the Wolf-Rayet star WR149, a highly reddened WN6-7 star located at 6.5 kpc in the direction (l,b) = (89.°53,+0.°65).

Type
Chapter 7: How are we to Understand the Small Scale Structure of the ISM?
Information
Symposium - International Astronomical Union , Volume 169: Unsolved Problems of the Milky Way , 1996 , pp. 619 - 620
Copyright
Copyright © Kluwer 1996 

References

Dubner, G., Giacani, E., Cappa de Nicolau, C., Reynoso, E. (1992) Astron. Astrophys. Suppl. 96, 505.Google Scholar
Niemela, V.S., Cappa de Nicolau, C. (1991) Astron. J. , 101, 572.Google Scholar