2023MNRAS.522.1951D

Query : 2023MNRAS.522.1951D

2023MNRAS.522.1951D - Mon. Not. R. Astron. Soc., 522, 1951-1967 (2023/June-3)

Ultracool dwarfs candidates based on 6 yr of the Dark Energy Survey data.

DAL PONTE M., SANTIAGO B., CARNERO ROSELL A., DE PARIS L., PACE A.B., BECHTOL K., ABBOTT T.M.C., AGUENA M., ALLAM S., ALVES O., BACON D., BERTIN E., BOCQUET S., BROOKS D., BURKE D.L., CARRASCO KIND M., CARRETERO J., CONSELICE C., COSTANZI M., DESAI S., DE VICENTE J., DOEL P., EVERETT S., FERRERO I., FLAUGHER B., FRIEMAN J., GARCIA-BELLIDO J., GERDES D.W., GRUENDL R.A., GRUEN D., GUTIERREZ G., HINTON S.R., HOLLOWOOD D.L., JAMES D.J., KUEHN K., KUROPATKIN N., MARSHALL J.L., MENA-FERNANDEZ J., MENANTEAU F., MIQUEL R., OGANDO R.L.C., PALMESE A., PAZ-CHINCHON F., PEREIRA M.E.S., PLAZAS MALAGON A.A., PIERES A., RAVERI M., RODRIGUEZ-MONROY M., SANCHEZ E., SCARPINE V., SCHUBNELL M., SEVILLA-NOARBE I., SMITH M., SOARES-SANTOS M., SUCHYTA E., SWANSON M.E.C., TARLE G., THOMAS D., TO C., WEAVERDYCK N. (The DES Collaboration)

Abstract (from CDS):

We present a sample of 19 583 ultracool dwarf candidates brighter than z ≤23 selected from the Dark Energy Survey DR2 coadd data matched to VHS DR6, VIKING DR5, and AllWISE covering ∼ 480 deg2. The ultracool candidates were first pre-selected based on their (i-z), (z-Y), and (Y-J) colours. They were further classified using a method that compares their optical, near-infrared, and mid-infrared colours against templates of M, L, and T dwarfs. 14 099 objects are presented as new L and T candidates and the remaining objects are from the literature, including 5342 candidates from our previous work. Using this new and deeper sample of ultracool dwarf candidates we also present: 20 new candidate members to nearby young moving groups and associations, variable candidate sources and four new wide binary systems composed of two ultracool dwarfs. Finally, we also show the spectra of 12 new ultracool dwarfs discovered by our group and presented here for the first time. These spectroscopically confirmed objects are a sanity check of our selection of ultracool dwarfs and photometric classification method.

Abstract Copyright: © 2023 The Author(s) Published by Oxford University Press on behalf of Royal Astronomical Society

Journal keyword(s): surveys - brown dwarfs - stars: low-mass

Status at CDS : Large table(s) will be appraised for possible ingestion in VizieR.

Simbad objects: 20

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Number of rows : 20
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 NAME THA MGr 00 00 -62.0           ~ 540 0
2 2MASS J00344300-4102266 BD* 00 34 42.9982994832 -41 02 26.600447472           L1: 8 0
3 CFBDS J030421-135836 BD? 03 04 21.58 -13 58 36.7           ~ 2 0
4 SIPS J0316-2848 BD* 03 16 45.1427530944 -28 48 52.175989224         18.048 L1 22 0
5 2MASS J03181842-6433220 * 03 18 18.424 -64 33 22.04           ~ 2 0
6 2MASS J03420931-2904317 BD* 03 42 09.3991802377 -29 04 31.971413438           L4.0 8 0
7 2MASS J04062677-3812102 BD* 04 06 26.77344 -38 12 10.2492           L2 12 0
8 2MASS J04135144-4010093 * 04 13 51.449 -40 10 09.30           ~ 2 0
9 2MASS J04185879-4507413 BD* 04 18 58.79424 -45 07 41.3436           L3 8 0
10 2MASS J05400823-3642181 * 05 40 08.231 -36 42 18.10           ~ 2 0
11 NAME Columba Association As* 06 04 19.4 -22 20 40           ~ 337 0
12 NAME AB Dor Moving Group MGr 06 38 53.4 -42 50 04           ~ 540 0
13 NAME beta Pic Moving Group MGr 14 30 -42.0           ~ 894 0
14 2MASS J20334473-5635338 BD* 20 33 44.73936 -56 35 33.8460           L0 6 0
15 2MASS J22271087-0045471 BD* 22 27 10.913 -00 45 47.31           L7.0 17 0
16 ULAS J223347.82+002214.0 BD* 22 33 47.826 +00 22 14.07           T0.0 5 0
17 NAME Carina Moving Group MGr ~ ~           ~ 66 0
18 NAME Octans Association As* ~ ~           ~ 101 0
19 NAME Argus Association As* ~ ~           ~ 266 0
20 NAME Carina-near Moving Group MGr ~ ~           ~ 118 0

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