Astronomy and Astrophysics – Astrophysics
Scientific paper
Apr 1986
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986ap%26ss.121..357l&link_type=abstract
Astrophysics and Space Science (ISSN 0004-640X), vol. 121, no. 2, April 1986, p. 357-385.
Astronomy and Astrophysics
Astrophysics
9
Astronomical Spectroscopy, Monochromatic Radiation, Nebulae, Star Clusters, Wolf-Rayet Stars, Emission Spectra, H Ii Regions, Molecular Clouds, Photoionization, Stellar Envelopes, Stellar Winds, Supernova Remnants, Tables (Data)
Scientific paper
This paper presents the results of monochromatic [O III], [N II], and [S II] observations of ring nebula Sh 157 around the star HD 219460 belonging to the Ba 3 cluster. The observations suggest that the Sh 157 ring structure may arise as a result of the HD 219460 stellar wind blowing the surrounding H II region, and the bubble age is found to be t ≅ (2 - 5)×105yr. Three outer envelopes have been distinguished: a weaker extended emission shell apparently blown out by the wind from B-stars of the Ba 3 cluster, and two dust shells which are likely to be associated with NGC 7510 and Cas OB2. The paper is also concerned with the discussion of young star aggregates Ba 3, NGC 7510, Cas OB1, OB2, OB4, OB5, OB7, and Cep OB1 and the associated H II regions, shells and supershells of gas and dust, molecular clouds, and supernova remnants which may be probable members of a single giant stellar complex where the star formation process is in progress.
Lomovskii A. I.
Lozinskaia T. A.
Sitnik T. G.
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