2018ApJ...863L..38R

Query : 2018ApJ...863L..38R

2018ApJ...863L..38R - Astrophys. J., 863, L38-L38 (2018/August-3)

Discovery of two new globular clusters in the Milky Way.

RYU J. and LEE M.G.

Abstract (from CDS):

The spatial distribution of known globular clusters (GCs) in the Milky Way shows that the current census of GCs is incomplete in the direction of the Galactic plane. We present the discovery of two new GCs located close to the Galactic plane in the sky. These two GCs, RLGC 1 and RLGC 2, were discovered serendipitously during our new cluster survey based on near-infrared and mid-infrared survey data. The two GCs show a grouping of resolved stars in their K-band images and the presence of faint diffuse light in their outer regions in the Wide-field Infrared Survey Explorer W1-band images. They also show prominent red giant branches (RGBs) in their K versus (J - K) color-magnitude diagrams (CMDs). We determine structural parameters of the two GCs using King profile-fitting on their K-band radial number density profiles. The determined values are consistent with those of known GCs. Finally, we determine the distances, metallicities, and reddenings of the two GCs using the isochrone fitting on their CMDs. For the fitting, we assume that the ages of the two GCs are 12.6 Gyr and the brightest RGB stars of each cluster correspond to the tip of the RGB. Distances and metallicities of the two GCs are estimated to be d = 28.8 ± 4.3 kpc and [Fe/H] = -2.2 ± 0.2 for RLGC 1 and d = 15.8 ± 2.4 kpc and [Fe/H] = -2.1 ± 0.3 for RLGC 2. These results show that the two GCs are located at the far-half region of the Milky Way and they may belong to the halo of the Milky Way.

Abstract Copyright: © 2018. The American Astronomical Society. All rights reserved.

Journal keyword(s): catalogs - Galaxy: halo - Galaxy: structure - globular clusters: individual: (RLGC 1, RLGC 2)

Simbad objects: 40

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Number of rows : 40
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 [KBT2017] Gaia 2 OpC 01 52 29.9 +53 01 57           ~ 20 0
2 NAME Eri III G 02 22 45.480 -52 17 04.92           ~ 79 0
3 [FSR2007] 0584 OpC 02 27 15.0 +61 37 28           ~ 23 0
4 VVV CL005 Cl* 11 38 59 -63 28.7           ~ 4 0
5 Cl VDBH 140 OpC 12 53 17 -67 10.2           ~ 37 0
6 NAME Kim 3 Cl* 13 22 45.20 -30 36 03.6           ~ 26 0
7 NAME Munoz 1 Cl* 15 01 48.02 +66 58 07.3           ~ 29 0
8 NGC 5824 GlC 15 03 58.612 -33 04 06.70   10.28 9.56     ~ 441 0
9 [FSR2007] 1716 OpC 16 10 33.0 -53 44 12           ~ 63 0
10 Ryu 059 GlC 16 17 08.73 -44 35 35.3           ~ 12 0
11 Camargo 1102 Cl? 17 21 45 -26 32.7           ~ 6 0
12 VVV CL110 Cl* 17 22 47.0 -34 41 17           ~ 3 0
13 NAME Sequoia Cluster GlC 17 31 12.0 -39 48 30           ~ 154 0
14 Camargo 1106 Cl? 17 32 34 -30 16.8           ~ 7 0
15 NAME 2MASS-GC04 OpC 17 35 44.8 -36 21 42           ~ 34 0
16 Camargo 1105 Cl? 17 36 34 -28 18.6           ~ 6 0
17 VVV CL003 Cl? 17 38 54.56 -29 54 25.3           ~ 9 0
18 VVV CL128 Cl* 17 39 59.0 -32 26 27           ~ 3 0
19 VVV CL002 GlC 17 41 06.30 -28 50 42.3           ~ 25 0
20 VVV CL131 Cl* 17 41 17.0 -34 34 02           ~ 5 0
21 VVV CL143 Cl* 17 44 36.0 -33 44 18           ~ 6 0
22 NAME Galactic Center reg 17 45 39.60213 -29 00 22.0000           ~ 16269 0
23 [MGA2017] 22 GlC 17 48 51 -33 03.7           ~ 10 0
24 VVV CL150 Cl* 17 50 41.0 -25 13 06           ~ 4 0
25 VVV CL001 Gl? 17 54 42.5 -24 00 53           ~ 46 0
26 NAME PWM 2 GlC 17 58 39 -05 04.3           ~ 19 0
27 Camargo 1104 Cl? 18 05 14 -24 58.8           ~ 5 0
28 Camargo 1103 Cl? 18 06 31 -25 09.7           ~ 8 0
29 DSH J1810.3-2320 OpC 18 10 23.9 -23 20 25           ~ 7 0
30 NAME Mercer 5 Cl* 18 23 19.800 -13 40 07.00           ~ 29 0
31 [MGA2017] 1 Gl? 18 34 48 -28 42.7           ~ 7 0
32 Ryu 879 GlC 18 45 28.02 -05 11 31.3           ~ 15 0
33 GCl 114 GlC 19 45 14.40 -08 00 26.0     7.54     ~ 165 0
34 NAME Sagittarius II Gl? 19 52 40.5 -22 04 05           ~ 97 0
35 [FSR2007] 0190 OpC 20 05 31.3 +33 34 09           ~ 25 0
36 NAME Laevens 3 GlC 21 06 54.3 +14 58 48           ~ 43 0
37 NAME Indus I Cl* 21 08 49.970 -51 09 48.60           ~ 68 0
38 NAME Segue 3 Cl* 21 21 31.0 +19 07 02           ~ 75 0
39 NAME Balbinot 1 Cl* 22 10 42.819 +14 56 49.03           ~ 29 0
40 NAME Kim 1 Cl* 22 11 41.30 +07 01 31.8           ~ 31 0

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