Ram Sagar, ; Yu, Qian Zhong (1989) JHK photometric study of the variable interstellar extinction in the direction of open star cluster NGC 654 Monthly Notices of the Royal Astronomical Society, 240 (3). pp. 551-561. ISSN 0035-8711
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Official URL: http://ads.iucaa.ernet.in/abs/1989MNRAS.240..551S
Abstract
JHK magnitudes have been determined for 18 stars in the field of NGC 654. Study of the interstellar extinction law in the cluster direction indicates an anomalous distribution of interstellar grains causing more extinction in U and B pass-bands compared to that obtained from the color excesses E(V-J), E(V-H) and E(V-K) using a normal reddening law. This implies a small shift in the grain-size distribution towards smaller than normal-sized particles. Patchy distribution of interstellar matter seems to be responsible for the non-uniform extinction in the cluster region.
| Item Type: | Article |
|---|---|
| Source: | Copyright of this article belongs to John Wiley and Sons. |
| Keywords: | Interstellar Extinction; Open Clusters; Star Clusters; Early Stars; Stellar Color; Stellar Magnitude |
| ID Code: | 65717 |
| Deposited On: | 17 Oct 2011 10:35 |
| Last Modified: | 17 Oct 2011 10:35 |
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