The W4 chimney/superbubble

Details The W4 chimney/superbubble The W4 chimney/superbubble

2000-07-27

arxiv.org/abs/astro-ph/0007425v1

Astronomy and Astrophysics

Astrophysics

4 pages, 1 figure, to appear in the proceedings of "Stars, Gas and Dust in Galaxies: Exploring the links",eds. D. Alloin, G. G

Scientific paper

A conical void in the Galactic HI within the Perseus arm has been proposed to be a chimney. However, Halpha data suggest that the structure may be closed at higher latitudes and therefore is a superbubble rather than a chimney. Recent observations have extended our view of the HI and the radio continuum emission to higher latitudes, up to 8 degrees;. The new images show the HI structure to be open at the top and a small filament suggests recent breakout. The conical shape of the structure is not easily explained by superbubble models.

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