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

Abstract

view Abstract Citations (40) References (25) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS Galactic ring nebulae associated with Wolf-Rayet stars. II. M 1-67 : a nebula braked by the interstellar medium. Chu, Y. -H. ; Treffers, R. R. Abstract 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. Publication: The Astrophysical Journal Pub Date: October 1981 DOI: 10.1086/159318 Bibcode: 1981ApJ...249..586C Keywords: 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; Astronomy full text sources ADS | data products SIMBAD (2) Related Materials (7) Part 1: 1981ApJ...249..195C Part 3: 1981ApJ...250..615C Part 4: 1982ApJ...254..562C Part 5: 1982ApJ...254..569T Part 6: 1982ApJ...254..578C Part 7: 1982ApJ...254..132T Part 8: 1983ApJS...53..937C