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

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

2002-10-31

arxiv.org/abs/astro-ph/0210680v1

Astron.Astrophys. 397 (2003) 191-200

Astronomy and Astrophysics

Astrophysics

11 pages, 13 figures, accepted in A&A

Scientific paper

10.1051/0004-6361:20021509

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 $\lambda \geq \lambda_J$, 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.

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