GALACTIC KINEMATICS OF PLANETARY NEBULAE WITH [WC] CENTRAL STAR
High resolution spectra are used to analyze the galactic kinematics and distribution of a sample of planetary nebulae with [WR] and ‘wel’ central star ([WR]PN and WLPN). The circular and peculiar velocities, (Vpec), of the objects were derived. The results are: (a) [WR]PNe are distributed mainly in...
| Autores: | , , |
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| Tipo de recurso: | artículo |
| Estado: | Versión publicada |
| Fecha de publicación: | 2013 |
| País: | México |
| Institución: | Universidad Nacional Autónoma de México |
| Repositorio: | Redalyc-UNAM |
| OAI Identifier: | oai:redalyc.org:57126152010 |
| Acceso en línea: | https://www.redalyc.org/articulo.oa?id=57126152010 |
| Access Level: | acceso abierto |
| Palabra clave: | Física, Astronomía y Matemáticas Rayet stars: Wolf Planetary nebulae: general stars: kinematics and dynamics |
| Sumario: | High resolution spectra are used to analyze the galactic kinematics and distribution of a sample of planetary nebulae with [WR] and ‘wel’ central star ([WR]PN and WLPN). The circular and peculiar velocities, (Vpec), of the objects were derived. The results are: (a) [WR]PNe are distributed mainly in the galactic disk and they are more concentrated in a thinner disk than WLPNe and normal PNe, which corresponds to a younger population. (b) The sample was separated in Peimbert’s types, and it is found that Type I PNe have Vpec ˂ 50 km s−1, indicating young objects. Most of the [WR]PNe are of Type II showing Vpec ˂ 60 km s−1, although a small percentage is of Type III with larger Vpec. This shows that the Wolf-Rayet phenomenon in central stars can occur at any stellar mass and in old objects. None of our WLPNe is of Type I. Thus, [WR]PNe and WLPNe are unrelated objects. |
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