2020AJ....160..241K

Query : 2020AJ....160..241K

2020AJ....160..241K - Astron. J., 160, 241-241 (2020/November-0)

Spectroscopic analysis of the bulge globular cluster ESO 456-SC38.

KUNDER A.M. and BUTLER E.

Abstract (from CDS):

It has been suggested that the oldest stellar populations in the Milky Way are tightly bound and confined to the central regions of the Galaxy. This is one of the reasons why a handful of globular clusters located in the bulge region are thought to be remnants of the primeval formation stages of the Milky Way. The globular cluster, ESO 456-SC38 (Djorgovski 2), is one such cluster; it has a blue horizontal branch, is projected very close to the center of the Galaxy, and has an orbit confining it to the bulge/bar region. The first α abundances of seven stars in this heavily reddened cluster are presented using Apache Point Observatory Galaxy Evolution Experiment Data Release 16. A significant spread in the abundances of N, C, Na, and Al indicates the presence of multiple stellar populations in this cluster. Using Gaia DR2 proper motions and radial velocities from the Bulge Radial Velocity Assay for RR Lyrae stars, we confirm that RR Lyrae stars belong to this globular cluster.

Abstract Copyright: © 2020. The American Astronomical Society. All rights reserved.

Journal keyword(s): Globular star clusters - Stellar astronomy - Galactic bulge - Milky Way dynamics - Chemical abundances - Stellar abundances - Stellar populations

Simbad objects: 42

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Number of rows : 42
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 M 3 GlC 13 42 11.62 +28 22 38.2     6.39     ~ 2593 0
2 M 5 GlC 15 18 33.22 +02 04 51.7     5.95     ~ 2095 0
3 M 107 GlC 16 32 31.86 -13 03 13.6           ~ 835 0
4 OGLE BLG-RRLYR-110 RR* 17 10 31.8577925136 -33 14 14.798574384     20.520   18.995 ~ 9 0
5 OGLE BLG-RRLYR-111 RR* 17 10 33.9559758024 -32 50 28.729118220     18.816   17.533 ~ 9 0
6 OGLE BLG-RRLYR-112 RR* 17 10 35.0443898318 -32 00 52.716072910     17.564   16.184 ~ 8 0
7 OGLE BLG-RRLYR-113 RR* 17 10 37.9038762672 -32 06 01.641481884     16.518   15.342 ~ 7 0
8 ESO 520-21 GlC 17 43 42.20 -26 13 21.0           ~ 211 0
9 Cl Terzan 5 Cl* 17 48 05.00 -24 46 48.0           ~ 948 1
10 OGLE BLG-RRLYR-10684 RR* 18 00 48.4890331080 -27 43 50.897448372     17.967 17.26 16.146 ~ 20 0
11 UCAC4 312-135892 * 18 01 18.0290601792 -27 42 10.108394640       15.806   ~ 4 0
12 OGLE BLG-RRLYR-11049 RR* 18 01 29.1338281025 -27 51 09.062880178     17.528 16.62 15.724 ~ 10 0
13 OGLE BLG-LPV-180173 LP* 18 01 29.8599680880 -27 37 44.794594848     16.571 15.847 13.477 ~ 5 0
14 OGLE BLG-RRLYR-11060 RR* 18 01 30.6933096840 -27 49 02.133717312     17.635   15.934 ~ 10 0
15 OGLE BLG-RRLYR-11089 RR* 18 01 35.5972710024 -27 39 05.937771960     18.153 17.29 16.36 ~ 17 0
16 OGLE BLG-RRLYR-11141 RR* 18 01 40.8756985176 -27 49 56.081372448     17.915 17.24 16.315 ~ 15 0
17 OGLE BLG-RRLYR-11142 RR* 18 01 40.9143239496 -27 53 51.224187228     17.631   16.125 ~ 11 0
18 UCAC4 311-141821 ** 18 01 45.18120 -27 52 45.3036           ~ 4 0
19 UCAC4 311-141838 Pe* 18 01 45.57864 -27 50 22.0488       15.146   ~ 5 0
20 UCAC4 311-141891 * 18 01 46.5744825432 -27 51 23.994311616           ~ 6 0
21 OGLE BLG-RRLYR-11190 RR* 18 01 46.9163224680 -27 49 28.245266112     17.847 17.21 16.246 ~ 16 0
22 UCAC4 311-141938 Pe* 18 01 47.7484410672 -27 49 46.478462196       14.925   ~ 5 0
23 UCAC4 311-141948 Pe* 18 01 47.8716507696 -27 49 08.002411896       15.761   ~ 7 0
24 ESO 456-38 GlC 18 01 49.10 -27 49 33.0           ~ 120 0
25 OGLE BLG-RRLYR-11218 RR* 18 01 49.6816065192 -27 49 13.080299808     18.068   16.32 ~ 10 0
26 OGLE BLG-RRLYR-11223 RR* 18 01 50.4067434888 -27 49 29.792653572     18.052 17.20 16.29 ~ 15 0
27 OGLE BLG-LPV-182899 LP* 18 01 51.3187495848 -27 48 08.592098004     15.985 15.714 13.209 ~ 6 0
28 UCAC4 311-142167 * 18 01 52.5655481496 -27 51 01.341041616           ~ 4 0
29 UCAC4 311-142173 Pe* 18 01 52.6449611908 -27 49 08.349978914           ~ 2 0
30 UCAC4 311-142207 * 18 01 53.3852009113 -27 51 44.650613835           ~ 4 0
31 OGLE BLG-RRLYR-11252 RR* 18 01 53.4456902952 -27 52 07.583800836     17.656 16.79 15.955 ~ 18 0
32 UCAC4 311-142326 Pe* 18 01 55.9200384994 -27 49 45.204426253       15.180   ~ 6 0
33 OGLE BLG-RRLYR-11372 RR* 18 02 05.8233257088 -27 47 44.508607224     18.518   16.481 ~ 11 0
34 OGLE BLG-LPV-184773 LP* 18 02 06.4638708264 -27 50 47.114623644     15.655 14.929 13.475 ~ 5 0
35 OGLE BLG-LPV-184776 LP* 18 02 06.5009238168 -27 48 29.069026596     15.939 15.042 13.265 ~ 5 0
36 NGC 6522 GlC 18 03 34.08 -30 02 02.3           ~ 569 0
37 NGC 6528 GlC 18 04 49.61 -30 03 20.8   12.12 10.65     ~ 561 0
38 NGC 6553 GlC 18 09 15.68 -25 54 27.9   9.08       ~ 644 0
39 NGC 6760 GlC 19 11 12.06 +01 01 49.7   11.37 9.78     ~ 264 0
40 M 71 GlC 19 53 46.49 +18 46 45.1           ~ 1190 0
41 NAME Gaia Enceladus-Sausage St* ~ ~           ~ 860 0
42 NAME Galactic Bulge reg ~ ~           ~ 4794 0

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