The aging of open clusters across galactic spiral arms

Details The aging of open clusters across galactic spiral arms The aging of open clusters across galactic spiral arms

Apr 1983

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983pazh....9..200i&link_type=abstract

(Pis'ma v Astronomicheskii Zhurnal, vol. 9, Apr. 1983, p. 200-205) Soviet Astronomy Letters (ISSN 0360-0327), vol. 9, Mar.-Apr.

Astronomy and Astrophysics

Astronomy

3

Milky Way Galaxy, Open Clusters, Star Distribution, Stellar Evolution, Density Wave Model, Galactic Structure

Scientific paper

In the spiral arm Carina-Sagittarius the age gradient across the arm appears to be due to a spiral density wave. The spiral pattern velocity Ωp ≈ 12-20 km/s kpc is estimated. In the Perseus arm no distinct age gradient was found probably because of its position near the corotation radius R = 12-15 kpc. The absence of an age gradient across the Orion arm indicates this arm to bear no relation to spiral density wave and large-scale galactic structure.

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