Near infrared imaging of NGC 2316

被引:11
作者
Teixeira, PS
Fernandes, SR
Alves, JF
Correia, JC
Santos, FD
Lada, EA
Lada, CJ
机构
[1] Univ Lisbon, Fac Ciencias, Dept Fis, P-1749016 Lisbon, Portugal
[2] European So Observ, D-8046 Garching, Germany
[3] Univ Florida, Dept Astron, Gainesville, FL 32611 USA
[4] Harvard Smithsonian Ctr Astrophys, Cambridge, MA 02138 USA
关键词
stars : formation; stars; low-mass; brown dwarfs; stars : planetary systems : protoplanetary disks; stars : luminosity function; infrared : stars; ISM : individual objects : NGC 2316;
D O I
10.1051/0004-6361:20034621
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
In the present paper we present JHK photometric results of the young embedded cluster NGC2316. We construct the cluster radial profile from which we determine a radius of 0.63 pc. We find 189 +/- 29 cluster members in an extinction limited sub-sample of the survey, 22 +/- 19 of which are possibly substellar. An average extinction of 4.5 visual magnitudes is derived using (H-K) colours of control fields. This extinction is due to the presence of residual parental molecular cloud. NGC2316 presents 16% source fraction of excess emission which is consistent with other results from clusters with an age of 2-3 Myr. This age is consistent with the distribution of sources in the colour-magnitude diagram when compared to theoretical isochrones, and the overall shape of the cluster KLF. The substellar population of the cluster is similar or smaller than that observed for other embedded clusters and the stellar objects dominate the cluster membership.
引用
收藏
页码:L1 / L4
页数:4
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