Bibcode
Rechy-García, J. S.; García-Rojas, J.; Peña, M.
Referencia bibliográfica
Revista Mexicana de Astronomía y Astrofísica Vol. 49, pp. 87-99 (2013)
Fecha de publicación:
4
2013
Número de citas
17
Número de citas referidas
15
Descripción
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,
(V_pec), 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 V_pec ≤ 50^ km s^{-1},
indicating young objects. Most of the [WR]PNe are of Type II showing
V_pec ≤ 60 km s^{-1}, although a small percentage is of Type III with
larger V_pec. 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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