Detalles de publicación
PP 013011
Galactic kinematics of planetary nebulae with [WC] central star
(1) Instituto de Astronomía, UNAM, Mexico
(2) Instituto de Astrofísica de Canarias, La Laguna, Tenerife, Spain
(3) Departamento de Astrofísica. Universidad de La Laguna, tenerife, Spain
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 showing that the Wolf-Rayet phenomenon in central stars can occur at any stellar mass and in old objects. None
of our WLPNe is Type I. Thus, [WR]PNe and WLPNe are unrelated objects.
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 showing that the Wolf-Rayet phenomenon in central stars can occur at any stellar mass and in old objects. None
of our WLPNe is Type I. Thus, [WR]PNe and WLPNe are unrelated objects.