dc.contributor.author |
Sagar, R |
|
dc.contributor.author |
Cannon, R. D |
|
dc.date.accessioned |
2008-07-09T09:15:31Z |
|
dc.date.available |
2008-07-09T09:15:31Z |
|
dc.date.issued |
1995-05 |
|
dc.identifier.citation |
Astronomy and Astrophysics Supplement, Vol.111, No. 1, pp. 75 – 84 |
en |
dc.identifier.issn |
0365-0138 |
|
dc.identifier.uri |
http://hdl.handle.net/2248/2608 |
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dc.description.abstract |
CCD observations in U, B, V, R and I passbands have been used to generate (U-B), (B-V) colour-colour and deep V, (B-V); V, (U-B) and V, (V-I) colour-magnitude diagrams for the young open cluster NGC 4755. The sample consists of 813 stars reaching down to V~20mag. There appears to be non-uniform extinction over the face of the cluster with a mean value of E(B-V)=0.41mag and a range of about 0.05mag. The true distance modulus to the cluster has been estimated as 11.6+/-0.2mag. An age of ~10Myr has been assigned to the post-main sequence (MS) cluster members. Ages of the post-MS and pre-MS stars indicate that massive (M>10Msun_) and low mass (M<2Msun_) stars in the cluster are formed nearly at the same time from a molecular cloud which might have existed for a minimum period of about 6-7Myr. |
en |
dc.format.extent |
1552204 bytes |
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dc.format.mimetype |
application/pdf |
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dc.language.iso |
en |
en |
dc.publisher |
The European Southern Observatory |
en |
dc.relation.uri |
http://adsabs.harvard.edu/abs/1995A%26AS..111...75S |
en |
dc.subject |
Stars: Formation |
en |
dc.subject |
HR Diagram |
en |
dc.subject |
Open Clusters And Associations: Individual: Ngc 4755 |
en |
dc.title |
A deep UBVRI CCD photometric study of the moderately young southern open star cluster NGC 4755 = Kappa-Crucis |
en |
dc.type |
Article |
en |