The HI bubble surrounding the Wolf-Rayet star WR149.

Details The HI bubble surrounding the Wolf-Rayet star WR149. The HI bubble surrounding the Wolf-Rayet star WR149.

Aug 1996

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996a%26a...312..283c&link_type=abstract

Astronomy and Astrophysics, v.312, p.283-288

Astronomy and Astrophysics

Astrophysics

16

Ism: Bubbles, Stars: Individual: Wr149, Stars: Wolf-Rayet, Radio Lines: Ism

Scientific paper

Neutral hydrogen 21-cm observations obtained with the 100-m Effelsberg telescope have disclosed a HI bubble surrounding the WN6-7 star WR149, located in the far side of the Perseus spiral arm. With a radius of 57pc and an expansion velocity of about 10km/s, this new bubble appears similar to those previously found around other Wolf-Rayet stars. Since stars of WN6-7 spectral sub-type are often found in open clusters and associations, we suggest that the observed HI bubble may be related to an undetected OB association. A second HI void in the neighbourhood is briefly discussed.

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