Near infrared imaging of NGC 2316

• Published in: Astronomy and astrophysics (Berlin) 2004-01, Vol.413 (1), p.L1-L4
• Main Authors: Teixeira, P. S., Fernandes, S. R., Alves, J. F., Correia, J. C., Santos, F. D., Lada, E. A., Lada, C. J.
• Format: Article
• Language: English
• Subjects: Astronomy; brown dwarfs; Characteristics and properties of the milky way; Earth, ocean, space; Exact sciences and technology; infrared: stars; ISM: individual objects: NGC 2316; Pre-main sequence objects, young stellar objects (yso's) and protostars (t tauri stars, orion population, herbig-haro objects, bok globules, bipolar outflows, cometary nebulae, etc.); Stars; stars: formation; stars: low-mass; stars: luminosity function; stars: planetary systems: protoplanetary disks; Stellar content and populations. Morphology and overall structure; Stellar systems. Galactic and extragalactic objects and systems. The universe
• ISSN: 0004-6361; 1432-0746
• DOI: 10.1051/0004-6361:20034621

In the present paper we present JHK photometric results of the young embedded cluster NGC 2316. 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, $22\pm 19$ 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. NGC 2316 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.