Astronomy and Astrophysics – Astrophysics
Scientific paper
Oct 1998
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998a%26as..132...13d&link_type=abstract
Astronomy and Astrophysics Supplement, v.132, p.13-20
Astronomy and Astrophysics
Astrophysics
43
Catalogues, Planetary Nebulae, Galaxy (The): Kinematics Of
Scientific paper
We present a compilation of radial velocities of 867 galactic planetary nebulae. Almost 900 new measurements are included. Previously published kinematical data are compared with the new high-resolution data to assess their accuracies. One of the largest samples in the literature shows evidence for a systematic velocity offset. We calculate weighted averages between all available data. Of the final values in the catalogue, 90% have accuracies better than 20 km s(-1) . We use this compilation to derive kinematical parameters of the galactic differential rotation obtained from least-square fitting and to establish the Disk rotation curve; we find no significal trend for the presence of an increasing external rotation curve. We examine also the rotation of the bulge; the derived curve is consistent with a linearly increasing rotation velocity with l: we find V_b,r=(9.9+/-1.3)l - (6.7+/-8.5) km s(-1) . A possible steeper gradient in the innermost region is indicated. Table 2 is available in electronic form only, via anonymous ftp to cdsarc.u-strasbg.fr (130.79.128.5) or via http://cdsweb.u-strasbg.fr/Abstract.html
Acker Agnés
Durand Stephane
Zijlstra Albert A.
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