Journal Article

S 266: a ring nebula around a Galactic B[e] supergiant?

César Esteban and Matilde Fernández

in Monthly Notices of the Royal Astronomical Society

Published on behalf of The Royal Astronomical Society

Volume 298, issue 1, pages 185-192
Published in print July 1998 | ISSN: 0035-8711
Published online July 1998 | e-ISSN: 1365-2966 | DOI:
S 266: a ring nebula around a Galactic B[e] supergiant?

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A narrow-band Hα image and high-resolution spectroscopy have been obtained in order to investigate the nature of S 266 and its central star MWC 137. The analysis of the stellar and nebular spectra suggests that MWC 137 is a B[e] supergiant located ≥ 6 kpc away from the Sun and not a Herbig Ae/Be star, as it has been traditionally classified. Moreover, the morphology and other properties of the nebula suggest that S 266 is a ring nebula, probably produced by the interaction of stellar winds with the ambient interstellar medium or unprocessed ejected matter. This result would imply that S 266 is the first ring nebula around a B[e] supergiant known in the Galaxy.

Keywords: circumstellar matter; stars: evolution; stars: mass-loss; ISM: bubbles; H ii regions; ISM: individual: S 266

Journal Article.  0 words. 

Subjects: Astronomy and Astrophysics

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