The O6.5f?p star HD 148937 and its interstellar environment

Details The O6.5f?p star HD 148937 and its interstellar environment The O6.5f?p star HD 148937 and its interstellar environment

Mar 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987a%26a...175..208l&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 175, no. 1-2, March 1987, p. 208-218.

Astronomy and Astrophysics

Astrophysics

29

Interstellar Matter, Nebulae, O Stars, Peculiar Stars, Stellar Envelopes, Stellar Models, Abundance, Dynamic Models, H Alpha Line, Line Spectra, Nitrogen

Scientific paper

The authors report on observations of the nebulosities around the extreme Of star HD 148937. The star is surrounded by a spherically symmetric Strömgren sphere, an ellipsoidal stellar-wind-blown shell, and a bipolar nebula ejected by HD 148937. The dust distribution and the physical parameters in the nebulosities are investigated. An abundance analysis of the bipolar nebula NGC 6164/5 reveals a nitrogen overabundance by a factor of 5 giving support for the evolved nature of HD 148937. Highly resolved line profiles of Hα and [N II] are used to derive a kinematic model of NGC 6164/5. A possible mechanism for the ejection of the nebulosities is suggested.

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