Galactic ring nebulae associated with Wolf-Rayet stars. II - M1-67: A nebula braked by the interstellar medium

Details Galactic ring nebulae associated with Wolf-Rayet stars. II - M1-67: A nebula braked by the interstellar medium Galactic ring nebulae associated with Wolf-Rayet stars. II - M1-67: A nebula braked by the interstellar medium

Oct 1981

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981apj...249..586c&link_type=abstract

Astrophysical Journal, Part 1, vol. 249, Oct. 15, 1981, p. 586-591.

Astronomy and Astrophysics

Astrophysics

31

Astronomical Spectroscopy, Galactic Structure, Interstellar Matter, Planetary Nebulae, Wolf-Rayet Stars, Fabry-Perot Interferometers, Galactic Nuclei, High Resolution, Interference Grating, Propagation Velocity, Radial Velocity, Stellar Mass Ejection

Scientific paper

It is pointed out that the nebula M1-67 is characterized by two uncommon properties. First, if it is a planetary nebula, it is the only one known with a WN nucleus. Second, both the central star 209 BAC, often called Merrill's star, and the nebula are moving at a high heliocentric velocity, approximately plus 200 km/s. The considered investigation concerning M1-67, takes into account a photographic study conducted with a narrow band interference filter and the mapping of the radial velocity of the nebula with a Fabry-Perot interferometer. It is concluded that the nebula M1-67, like planetary nebula, is made of matter, which has been ejected from the central star. It is thought possible that the star had ejected material prior to the oldest component currently observed and that the earlier ejecta have dissipated and can no longer be detected. An illustration is given that nebular braking is possible.

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