Astronomy and Astrophysics – Astronomy
Scientific paper
Dec 1995
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995aas...187.4506t&link_type=abstract
American Astronomical Society, 187th AAS Meeting, #45.06; Bulletin of the American Astronomical Society, Vol. 27, p.1348
Astronomy and Astrophysics
Astronomy
1
Scientific paper
From HI observations, Normandeau, Taylor and Dewdney have identified a possible galactic chimney emanating from W4. We observed a 10deg --diameter field centered on the chimney in the Balmer-alpha line using a CCD camera sensitive to faint emission. Our observations reveal a pair of wisps diverging from the W4 region, and approximately coincident with the boundaries of the chimney as indicated by the HI void. These wisps can be traced to great distance. They appear to close six degrees (~200 pc) from W4 and seven degrees above the galactic plane. These observations lend support to the chimney hypothesis and suggest that we may be seeing the ionized inner surface of a large shell formed by stellar outflows from the W4 region. This research was supported by NSF grant AST-9319670 and a grant from the Horton Foundation to Virginia Tech.
Dennison Brian
Simonetti John H.
Topasna Gregory A.
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