2026ApJ..1000...46T

Query : 2026ApJ..1000...46T

2026ApJ..1000...46T - Astrophys. J., 1000, 46 (2026/March-3)

Ultra-faint Milky Way Satellites Discovered in Carina, Phoenix, and Telescopium with DELVE Data Release 3.

TAN C.Y., CERNY W., PACE A.B., SHARP J.A., OVERDECK K., DRLICA-WAGNER A., SIMON J.D., MUTLU-PAKDIL B., SAND D.J., SENKEVICH A.M., ERKAL D., FERGUSON P.S., SOBREIRA F., ATZBERGER K.R., CARLIN J.L., CHITI A., CRNOJEVIC D., JI A.P., JOHNSON L.C., LI T.S., LIMBERG G., MARTINEZ-VAZQUEZ C.E., MEDINA G.E., PLACCO V.M., RILEY A.H., TOLLERUD E.J., VIVAS A.K., ABBOTT T.M.C., AGUENA M., ALVES O., BACON D., BOCQUET S., BROOKS D., BURKE D.L., CAMILLERI R., CARBALLO-BELLO J.A., CARNERO ROSELL A., CARRETERO J., CHENG T.-Y., CHOI Y., DA COSTA L.N., DA SILVA PEREIRA M.E., DAVIS T.M., DE VICENTE J., DESAI S., DOEL P., EVERETT S., FLAUGHER B., FRIEMAN J., GARCIA-BELLIDO J., GRUEN D., GUTIERREZ G., HINTON S.R., HOLLOWOOD D.L., JAMES D.J., KUEHN K., LEE S., MARSHALL J.L., MENA-FERNANDEZ J., MENANTEAU F., MIQUEL R., MYLES J., NAVABI M., NIDEVER D.L., NOEL N.E.D., OGANDO R.L.C., PLAZAS MALAGON A.A., PORREDON A., SAMUROFF S., SANCHEZ E., SANCHEZ CID D., SEVILLA-NOARBE I., SMITH M., STRINGFELLOW G.S., SUCHYTA E., SWANSON M.E.C., VIKRAM V., WALKER A.R., ZENTENO A. (The DELVE Collaboration) (The DES Collaboration)

Abstract (from CDS):

We report the discovery of three Milky Way satellite candidates: Carina IV, Phoenix III, and DELVE 7, in the third data release of the DECam Local Volume Exploration survey (DELVE). The candidate systems were identified by cross-matching results from two independent search algorithms. All three are extremely faint systems composed of old, metal-poor stellar populations (τ ≳ 10 Gyr, [Fe/H] ≲-1.4). Carina IV (MV = -2.8; r1/2 = 40 pc) and Phoenix III (MV = -1.2; r1/2 = 19 pc) have half-light radii that are consistent with the known population of dwarf galaxies, while DELVE 7 (MV = 1.2; r1/2 = 2 pc) is very compact and seems more likely to be a star cluster, though its nature remains ambiguous without spectroscopic follow-up. The Gaia proper motions of stars in Carina IV (${M}_{\star }=225{0}_{-830}^{+1180}\,{M}_{\odot }$) indicate that it is unlikely to be associated with the LMC, while DECam CaHK photometry confirms that its member stars are metal poor. Phoenix III (${M}_{\star }=52{0}_{-290}^{+660}\,{M}_{\odot }$) is the faintest known satellite in the extreme outer stellar halo (DGC > 100 kpc), while DELVE 7 (${M}_{\star }=6{0}_{-40}^{+120}\,{M}_{\odot }$) is the faintest known satellite with DGC > 20 kpc.

Abstract Copyright: © 2026. The Author(s). Published by the American Astronomical Society.

Journal keyword(s): Dwarf galaxies - Local Group - Sky surveys - Milky Way dark matter halo

Nomenclature: Fig. 1, Table 1: NAME Carina IV Dwarf Galaxy N=1, NAME Phoenix III N=1, DELVE N (No. 7) added.

Status at CDS : All or part of tables of objects will be ingested in SIMBAD with priority 1.

Simbad objects: 33

goto Full paper

goto View the references in ADS

Number of rows : 33
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 Sculptor Dwarf Galaxy G 01 00 09.4 -33 42 32   9.79 8.6 8.81   ~ 1498 4
2 Gaia DR3 4959457079527646080 * 01 46 48.4907326031 -41 26 06.315029656           ~ 1 0
3 NAME Phoenix III G 01 46 51 -41 25.7           ~ 1 0
4 NAME Phoenix Dwarf Galaxy Sy1 01 51 06.3 -44 26 41   13.48 13.2 12.69   ~ 575 2
5 NAME Eri III G 02 22 45.480 -52 17 04.92           ~ 79 0
6 NAME Magellanic Clouds GrG 03 00 -71.0           ~ 7988 0
7 NAME LMC G 05 23 34.6 -69 45 22     0.4     ~ 19090 0
8 Gaia DR3 5286348827132240768 * 06 56 03.8167414707 -63 19 08.583515149           ~ 1 0
9 Gaia DR3 5286348934506327424 * 06 56 07.3792892892 -63 18 22.694682139           ~ 1 0
10 Gaia DR3 5286348865787318784 * 06 56 07.7308724674 -63 18 30.600244386           ~ 1 0
11 Gaia DR3 5286301616851702528 * 06 56 09.4065288008 -63 20 48.428330258           ~ 1 0
12 NAME Carina IV Dwarf Galaxy G 06 56 11 -63 19.1           ~ 1 0
13 Gaia DR3 5286348865786859264 * 06 56 12.4732515644 -63 18 46.486583223           ~ 1 0
14 Gaia DR3 5286348865786852864 * 06 56 13.6369083826 -63 17 51.336078977           ~ 1 0
15 Gaia DR3 5286301655509365888 * 06 56 15.2173548289 -63 20 40.650267540           ~ 1 0
16 Gaia DR3 5286348693988641024 * 06 56 19.6736824409 -63 19 26.670018949           ~ 1 0
17 Gaia DR3 5286348968866071168 * 06 56 19.7337758000 -63 17 39.995001968           ~ 1 0
18 Gaia DR3 5286348758412769920 * 06 56 20.4904538218 -63 18 51.468714077           ~ 1 0
19 Gaia DR3 5286301513772625536 * 06 56 36.9732106906 -63 20 07.420656317           ~ 1 0
20 NAME Carina II Dwarf Galaxy G 07 36 25.6 -57 59 57           ~ 86 0
21 NAME Car III Dwarf Galaxy G 07 38 31.2 -57 53 59           ~ 81 0
22 NAME Sextans II LSB 10 25 45 -00 37.9           ~ 5 0
23 NAME UMa III Cl* 11 38 49.8 +31 04 42           ~ 22 0
24 NAME Vir I Dwarf Galaxy LSB 12 00 09.6 -00 40 48           ~ 40 0
25 NAME Virgo III Dwarf Galaxy LSB 12 25 24 +04 27.0           ~ 6 0
26 NAME Kim 3 Cl* 13 22 45.20 -30 36 03.6           ~ 26 0
27 DELVE 5 Cl* 14 48 25 +17 28.1     18.37     ~ 7 0
28 DELVE 1 Cl* 16 30 54 -00 58.3     16.19     ~ 19 0
29 DELVE 7 Cl* 20 16 26 -50 19.8           ~ 1 0
30 NAME Indus I Cl* 21 08 49.970 -51 09 48.60           ~ 68 0
31 NAME Tuc V G 23 37.4 -63 16           ~ 84 0
32 NAME Phe II G 23 39 59.4 -54 24 22           ~ 107 0
33 NAME Local Group GrG ~ ~           ~ 9325 0

To bookmark this query, right click on this link: simbad:objects in 2026ApJ..1000...46T and select 'bookmark this link' or equivalent in the popup menu