Interstellar extinction in the open clusters towards galactic longitude around 130 degrees

Abstract

In this paper we present a detailed study of the intra-cluster reddening material in the young open clusters located around $l\sim 130^o$ using colour-excess diagrams and two-colour diagrams. The study supports the universality of the extinction curves for $\lambda \ge {\lambda }_J$, whereas for shorter wavelengths the curve depends upon the value of the $R_{cluster}$ (total-to-selective absorption in the cluster region). The value of $R_{cluster}$ in the case of NGC 654, NGC 869 and NGC 884 is found to be normal, whereas the value of $R_{cluster}$ in the cluster regions NGC 1502 and IC 1805 indicates an anomalous reddening law in these regions. It is also found that the extinction process in the $U$ band in the case of NGC 663 seems to be less efficient, whereas in the case of NGC 869 the process is more efficient.

11 pages, 13 figures, accepted in A&A

References in corpus (3)

• Correcting for the Effects of Interstellar Extinction
• Interstellar extinction in the open clusters towards galactic longitude around 130 degrees
• Non-uniform extinction in young open star clusters

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