Bibcode
Rechy-García, J. S.; García-Rojas, J.; Peña, M.
Bibliographical reference
Revista Mexicana de Astronomía y Astrofísica Vol. 49, pp. 87-99 (2013)
Advertised on:
4
2013
Citations
17
Refereed citations
15
Description
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.
Related projects
Physics of Ionized Nebulae
The research that is being carried out by the group can be condensed into two main lines: 1) Study of the structure, dynamics, physical conditions and chemical evolution of Galactic and extragalactic ionized nebulae through detailed analysis and modelization of their spectra. Investigation of chemical composition gradients along the disk of our
Jorge
García Rojas