Low-mass substellar candidates in NGC 2264
| dc.creator | Kendall, Tim | |
| dc.creator | Bouvier, Jerome | |
| dc.creator | Moraux, Estelle | |
| dc.creator | James, David | |
| dc.date | 2004-07-16 | |
| dc.date.accessioned | 2026-07-07T02:14:02Z | |
| dc.date.available | 2026-07-07T02:14:02Z | |
| dc.description | NGC 2264 is a young (3 Myr), populous star forming region for which our optical studies have revealed a very high density of potential brown dwarf (BD) candidates - 236 in less than 1 sq. deg. - from the substellar limit down to 20 Mjup. Candidate BD were first selected using wide field (I,z) band imaging with CFHT/12K, by reference to current theoretical isochrones. Subsequently, around 50% of the I,z sample were found to have near-infrared (2MASS) photometry, allowing further selection by comparison with the location of DUSTY isochrones in colour-colour diagrams involving combinations of IJHK colours. After rejection of objects with only upper limits to J, six candidates were selected from the I-K,J-H diagram which afforded the best separation of candidate and field objects; of these, 2 also lie close to the model predictions in the I-J,I-K and I-J,H-K plots. After dereddening, all six remain probable very low-mass NGC 2264 members, in spite of their low Av, while a different group of objects are shown to be highly reddened background giants. A further three brighter (at $I$) objects selected by their I-J,I-K colours, lie at the substellar limit and are likely cluster objects, as are 2 intermediate mass objects selected by their I-K and H-K colours. These objects potentially constitute a hitherto unknown population of young, low-mass BD in this region; only slighty deeper observations could reveal a new laboratory for the study of near-planetary-mass objects. | |
| dc.description | 6 pages, 8 figures, to appear in "Young Local Universe", Proceedings of the XXXIXth Rencontres de Moriond, La Thuile, Aosta Valley, Italy, March 21-28, 2004, Eds: A. Chalabaev, T. Fukui, T. Montmerle and J. Tran-Tranh-Van, Editions Frontieres, Paris | |
| dc.identifier | https://arxiv.org/abs/astro-ph/0407345 | |
| dc.identifier | http://arxiv.org/abs/astro-ph/0407345 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/7965 | |
| dc.subject | Astrophysics | |
| dc.title | Low-mass substellar candidates in NGC 2264 | |
| dc.type | text |