Bibcode
Rechy-García, Jackeline S.; Peña, Miriam; García-Rojas, J.
Bibliographical reference
Planetary Nebulae: An Eye to the Future, Proceedings of the International Astronomical Union, IAU Symposium, Volume 283, p. 478-479
Advertised on:
8
2012
Citations
0
Refereed citations
0
Description
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 V pec <= 60 km/s). However there is
an important fraction (28%) showing V pec larger than 60 km/s
therefore they are classified as Peimbert's Type III.