The population in the background of open clusters: Tracer of the Norma-Cygnus arm

Details The population in the background of open clusters: Tracer of the Norma-Cygnus arm The population in the background of open clusters: Tracer of the Norma-Cygnus arm

2006-08-31

arxiv.org/abs/astro-ph/0608705v1

Mon.Not.Roy.Astron.Soc.373:243-254,2006

Astronomy and Astrophysics

Astrophysics

Accepted for the publication in MNRAS, 9 pages, 9 figures, 2 tables

Scientific paper

10.1111/j.1365-2966.2006.11015.x

We present colour-magnitude diagrams of open clusters, located in the range $112^\circ < l < 252^\circ$, manifesting stellar populations in the background of clusters. Some of the populations are found to be located beyond the Perseus arm and may be the part of Norma-Cygnus (outer) arm. The outer arm seems to be continued from $l\sim120^\circ$ to $l\sim235^\circ$. The background populations follow the downward warp of the Galactic plane around $l\sim240^\circ$.

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