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Young galactic clusters and the rotation curve of our Galaxy

  • J. Hron (a1) and H. M. Maitzen (a1)

Extract

The most recent determination of Oort's galactic rotation constant ‘A’ from open clusters was made by Taff and Littleton (1972). They obtained A=15 km/s/kpc, but unfortunately they omitted a detailed description of their cluster sample. For the present work we compiled a catalogue of O-B3 clusters for which radial velocities and distances are available. The individual cluster references given by Janes and Adler (1982) have been used to find best distances for the clusters. Radial velocities were taken from the list of Dr. Wramdemark (private communication) and from Hron et al. (1984). The catalogue contains 105 clusters distributed over the four galactic quadrants as 16:27:35:27.

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References

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Hron, H., Maitzen, H.M., Moffat, A.F.J., Schmidt-Kaler, Th.: 1984 (in prep.)
Janes, K., Adler, D.: 1982, Astrophys. J. Suppl. Ser. 49, 425
Taff, L.G., Littleton, J.E.: 1972, Astron. Astrophys. 21, 443

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