IZ Photometry of L dwarfs and the implications for brown dwarf surevys
| dc.creator | Steele, I. A. | |
| dc.creator | Howells, L. | |
| dc.date | 2000-02-11 | |
| dc.date.accessioned | 2026-07-07T01:52:15Z | |
| dc.date.available | 2026-07-07T01:52:15Z | |
| dc.description | The I-Z colour has been recently shown to be a good temperature indicator for M dwarfs. We present the first IZ photometry of a small sample of L dwarfs ranging in spectral type from L0.5V to L6.0V. We find that the I-Z colour is not a good temperature indicator for objects between L1V and L5V, such objects having colours that overlap with mid M dwarfs. We attribute this to the reduction in the strength of the TiO and VO bands in the L dwarfs which are the dominant opacity source in the I band for late M dwarfs. Beyond L5V, I-Z appears to be a reasonable indicator. This has important implications for the planning of optical surveys for cool objects in clusters and the field. For example I-Z will cease to be a good method of discriminating brown dwarfs in the Pleiades below around 0.04 Msolar, and at around 0.075 Msolar in the Hyades and Praesepe. | |
| dc.description | 3 pages, accepted for publication in MNRAS pink pages | |
| dc.identifier | https://arxiv.org/abs/astro-ph/0002246 | |
| dc.identifier | http://arxiv.org/abs/astro-ph/0002246 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/558 | |
| dc.subject | Astrophysics | |
| dc.title | IZ Photometry of L dwarfs and the implications for brown dwarf surevys | |
| dc.type | text |