2007MNRAS.379.1423L

Query : 2007MNRAS.379.1423L

2007MNRAS.379.1423L - Mon. Not. R. Astron. Soc., 379, 1423-1430 (2007/August-3)

Eight new T4.5-T7.5 dwarfs discovered in the UKIDSS Large Area Survey Data Release 1.

LODIEU N., PINFIELD D.J., LEGGETT S.K., JAMESON R.F., MORTLOCK D.J., WARREN S.J., BURNINGHAM B., LUCAS P.W., CHIU K., LIU M.C., VENEMANS B.P., McMAHON R.G., ALLARD F., BARAFFE I., BARRADO Y NAVASCUES D., CARRARO G., CASEWELL S.L., CHABRIER G., CHAPPELLE R.J., CLARKE F., DAY-JONES A.C., DEACON N.R., DOBBIE P.D., FOLKES S.L., HAMBLY N.C., HEWETT P.C., HODGKIN S.T., JONES H.R.A., KENDALL T.R., MAGAZZU A., MARTIN E.L., McCAUGHREAN M.J., NAKAJIMA T., PAVLENKO Y., TAMURA M., TINNEY C.G. and ZAPATERO OSORIO M.R.

Abstract (from CDS):

We present eight new T4.5-T7.5 dwarfs identified in the UKIRT (United Kingdom Infrared Telescope) Infrared Deep Sky Survey (UKIDSS) Large Area Survey (LAS) Data Release 1 (DR1). In addition we have recovered the T4.5 dwarf SDSSJ020742.91+000056.2 and the T8.5 dwarf ULASJ003402.77-005206.7. Photometric candidates were picked up in two-colour diagrams over 190deg2 (DR1) and selected in at least two filters. All candidates exhibit near-infrared spectra with strong methane and water absorption bands characteristic of T dwarfs and the derived spectral types follow the unified scheme of Burgasser et al.. We have found six new T4.5-T5.5 dwarfs, one T7 dwarf, one T7.5 dwarf and recovered a T4.5 dwarf and a T8.5 dwarf. We provide distance estimates which lie in the 15-85pc range; the T7.5 and T8.5 dwarfs are probably within 25pc of the Sun. We conclude with a discussion of the number of T dwarfs expected after completion of the LAS, comparing these initial results to theoretical simulations.

Abstract Copyright: 2007 The Authors. Journal compilation © 2007 RAS

Journal keyword(s): techniques: photometric - techniques: spectroscopic - surveys - stars: low-mass, brown dwarfs - infrared: stars

Simbad objects: 17

goto Full paper

goto View the references in ADS

Number of rows : 17
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 ULAS J002422.93+002247.9 BD* 00 24 22.93320 +00 22 47.8164           T4.5 5 0
2 CFBDS J003402-005206 BD* 00 34 02.7971 -00 52 03.946           T8.5 51 0
3 HD 5892 * 01 00 30.4295927304 +07 21 13.980427200   8.58 8.11     F5V 36 0
4 ULAS J020336.94-010231.1 BD* 02 03 36.94272 -01 02 31.3080           T5.0 6 0
5 2MASS J02074284+0000564 BD* 02 07 42.84984 +00 00 56.4408           T4.5 46 0
6 ULAS J022200.43-002410.5 BD* 02 22 00.43176 -00 24 10.5516           T5 5 0
7 Cl Melotte 22 OpC 03 46 38.0 +24 10 41           ~ 3679 0
8 Cl* Melotte 22 TEIDE 1 LM* 03 47 17.9147300712 +24 22 31.746313740         19.26 M8.0 107 0
9 NAME sig Ori Cluster OpC 05 38 42 -02 36.0           ~ 623 0
10 HD 42581B BD* 06 10 34.80 -21 52 00.0           T6.5 549 0
11 ULAS J082707.67-020408.2 BD* 08 27 07.6574 -02 04 07.537           T5.5 10 0
12 ULAS J090116.23-030635.0 BD* 09 01 16.2370 -03 06 33.467           T7.5 14 0
13 ULAS J094806.06+064805.0 BD* 09 48 05.9865 +06 48 06.691           T7.0 7 0
14 ULAS J100759.90-010031.1 BD* 10 07 59.91192 -01 00 31.2120           T5.5 4 0
15 ULAS J101821.78+072547.1 BD* 10 18 21.78912 +07 25 47.1756           T5.0 8 0
16 ULAS J145243.59+065542.9 BD* 14 52 43.57968 +06 55 42.9168           T4.5 5 0
17 ULAS J223955.76+003252.6 BD* 22 39 55.7110 +00 32 53.282           T5.5 9 0

To bookmark this query, right click on this link: simbad:objects in 2007MNRAS.379.1423L and select 'bookmark this link' or equivalent in the popup menu