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

Bibcode
1991A&A...244..205E
Esteban, C.; Vilchez, J. M.; Manchado, A.; Smith, L. J.
Bibliographical reference

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

Advertised on:
4
1991
Number of authors
4
IAC number of authors
3
Citations
53
Refereed citations
45
Description
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.
Type
Refereed
H II regions
Nebulae
Wolf-Rayet stars
Interstellar extinction

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