Abstract

PENA, Miriam; RECHY-GARCIA, Jackeline S.  and  GARCIA-ROJAS, Jorge. Galactic kinematics of planetary nebulae with [WC] central star. Rev. mex. astron. astrofis [online]. 2013, vol.49, n.1, pp.87-99. ISSN 0185-1101.

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.

Keywords : planetary nebulae [general]; stars [kinematics and dynamics]; stars [Wolf-Rayet].

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