JHK photometric study of the variable interstellar extinction in the direction of open star cluster NGC 654

dc.contributor.author	Sagar, R
dc.contributor.author	Yu, Q. Z
dc.date.accessioned	2008-09-15T15:24:00Z
dc.date.available	2008-09-15T15:24:00Z
dc.date.issued	1989-10
dc.identifier.citation	Monthly Notices Royal Astronomical Society, Vol. 240, No. 3, pp. 551 - 561	en
dc.identifier.issn	0035-8711
dc.identifier.uri	http://hdl.handle.net/2248/3635
dc.description.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 nonuniform extinction in the cluster region.	en
dc.language.iso	en	en
dc.publisher	The Royal Astronomical Society	en
dc.relation.uri	http://ads.iucaa.ernet.in/abs/1989MNRAS.240..551S	en
dc.subject	Interstellar extinction	en
dc.subject	Open clusters	en
dc.subject	Star clusters	en
dc.subject	Early stars	en
dc.subject	Stellar color	en
dc.subject	Stellar magnitude	en
dc.title	JHK photometric study of the variable interstellar extinction in the direction of open star cluster NGC 654	en
dc.type	Article	en