Spatially resolved spectroscopy of WR ring nebulae. II - M1-67

Details Spatially resolved spectroscopy of WR ring nebulae. II - M1-67 Spatially resolved spectroscopy of WR ring nebulae. II - M1-67

Apr 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991a%26a...244..205e&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 244, no. 1, April 1991, p. 205-216.

Astronomy and Astrophysics

Astrophysics

41

H Ii Regions, Nebulae, Stellar Spectra, Wolf-Rayet Stars, High Resolution, Interstellar Extinction, Interstellar Matter, Spatial Resolution

Scientific paper

Detailed, high spatial resolution spectroscopy of the WR ring nebula M1-67 surrounding the WN 8 star WR 124 is presented. Abundances for 4 positions in M1-67 are derived and it is found that N is enhanced by a factor of 4 - 7.5, O is deficient by a factor of 5 - 7.5 and S has a normal H II region abundance. This remarkable abundance pattern leads to the conclusion that M1-67 is composed, almost entirely, of stellar ejecta produced by a relatively massive progenitor. The historical controversy that M1-67 is a PN rather than a WR ring nebula is discussed. The interstellar extinction distribution of nearby field stars is considered and a lower limit to the distance to M1-67 of 2.5 kpc is found.

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