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

Source: [Interstellar extinction in the open clusters towards galactic longitude around 130 degrees](<https://www.sota2.com/research/paper/68fa259e2c2a3760193b21fe>)

Collection index: [llms.txt](<https://www.sota2.com/research/llms.txt>)

Data updated: 2025-10-24T10:51:19.686Z

Authors: A K Pandey, K Upadhyay, Y Nakada, K Ogura

Published: 2002-10-31T12:56:09.000Z

## 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 $\\lambda \\geq \\lambda\_J$, 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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## Original sources and implementation

[Original paper](<https://arxiv.org/abs/astro-ph/0210680>)

[PDF](<https://arxiv.org/pdf/astro-ph/0210680.pdf>)