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The kinematical behavior of Galactic PNe with [WC] central star

Published online by Cambridge University Press:  30 August 2012

Jackeline S. Rechy-García ,
Miriam Peña  and
Jorge García-Rojas
Jackeline S. Rechy-García
Affiliation:
Fac. de Fisica e Inteligencia Artificial, U. Veracruzana, Xalapa, Ver., Mexico email: [email protected]
Miriam Peña
Affiliation:
Instituto de Astronomia, UNAM, 04510 Mexico D.F., email: [email protected]
Jorge García-Rojas
Affiliation:
Instituto de Astrofisica de Canarias, La Laguna, Tenerife, Spain, email: [email protected]
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Abstract

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High resolution spectroscopic data of a large sample of galactic planetary nebulae with [WC] central stars ([WC]PNe) are analyzed to determine their kinematical behavior. Their heliocentric velocities have been determined with a precision better than a few km/s. Distances obtained from the literature are used to derive the peculiar velocities of the objects. Our preliminary results are: (a) The [WC] PNe are distributed in the galactic disk and they appear more concentrated than the normal PNe. (b) Separating the sample in Peimbert's types, we find that Type I PNe show in general low peculiar velocities (<50 km/s) except for a couple of objects apparently belonging to the galactic bulge. For the other [WC]PNe, most of them belong to the Peimbert's Type II (defined as having Vpec ≤ 60 km/s). However there is an important fraction (28%) showing Vpec larger than 60 km/s therefore they are classified as Peimbert's Type III.

Keywords

Galaxy: kinematics and dynamicsplanetary nebulae: generalstars: AGB and post-AGB
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 7 , Symposium S283: Planetary Nebulae: An Eye to the Future , July 2011 , pp. 478 - 479
Copyright
Copyright © International Astronomical Union 2012

References

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