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: http://www.atnf.csiro.au/people/Baerbel.Koribalski/publications/wrbubbles.html
Дата изменения: Unknown Дата индексирования: Sun Dec 23 13:55:03 2007 Кодировка: Поисковые слова: launch |
Abstract. Neutral hydrogen observations with the Effelsberg 100-m telescope have disclosed an HI bubble surrounding the WN6-7 star WR 149, located in the far side of the Perseus spiral arm. With a radius of 57 pc and an expansion velocity of about 10 km/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.
Keywords. ISM: bubbles -- stars: individual: WR 149 -- stars: Wolf-Rayet