A survey of nebulae around Galactic Wolf-Rayet stars in the southern sky, 1

Details A survey of nebulae around Galactic Wolf-Rayet stars in the southern sky, 1 A survey of nebulae around Galactic Wolf-Rayet stars in the southern sky, 1

Jul 1994

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994apjs...93..229m&link_type=abstract

Astrophysical Journal Supplement Series (ISSN 0067-0049), vol. 93, no. 1, p. 229-232

Astronomy and Astrophysics

Astronomy

38

Interstellar Matter, Nebulae, Sky Surveys (Astronomy), Southern Sky, Stellar Envelopes, Wolf-Rayet Stars, H Alpha Line, Oxygen Spectra

Scientific paper

Images are presented from the first half of a survey of all Galactic Wolf-Rayet stars in the catalog of van der Hucht et al. (1981) residing in the southern skies. Previous surveys used only existing broad-band photographic plates. Encouraged by successes using CCD imaging with interference filters of the LMC and northern Galaxy (Miller & Chu 1993), we have expanded the survey to the southern hemisphere. In the first half of our southern survey, H alpha and (O III) narrow-band CCD images of fields centered on known Wolf-Rayet stars have indicated the existence of six new ring nebulae as well as revealing previously unobserved morphological features in the known ring nebulae. An example of this is an almost perfect ring of (O III) emission residing interior to the previously observed H alpha filaments of the Wolf-Rayet ring nebulae RCW 104. Our surveys to date indicate that 21% of all Wolf-Rayet stars have ring nebulae, with WN-type Wolf-Rayet stars having a greater likelihood for an associated ring.

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