2018MNRAS.481...49P

Query : 2018MNRAS.481...49P

2018MNRAS.481...49P - Mon. Not. R. Astron. Soc., 481, 49-58 (2018/November-3)

Accurate radial velocity and metallicity of the Large Magellanic Cloud old globular clusters NGC 1928 and NGC 1939.

PIATTI A.E., HWANG N., COLE A.A., ANGELO M.S. and EMPTAGE B.

Abstract (from CDS):

We present results obtained from spectroscopic observations of red giants located in the fields of the Large Magellanic Cloud (LMC) globular clusters (GCs) NGC 1928 and NGC 1939. We used the GMOS and AAOmega+2dF spectrographs to obtain spectra centred on the Ca II triplet, from which we derived individual radial velocities (RVs) and metallicities. From cluster members we derived mean RVs of RV_ NGC 1928_=249.58±4.65 km s–1 and RV_ NGC 1939_=258.85±2.08 km s–1, and mean metallicities of [Fe/H]_ NGC 1928_=-1.30±0.15 dex and [Fe/H]_ NGC 1939_=-2.00±0.15 dex. We found that both GCs have RVs and positions consistent with being part of the LMC disc, so that we rule out any possible origin, but in the same galaxy. By computing the best solution of a disc that fully contains each GC, we obtained circular velocities for the 15 known LMC GCs. We found that 11/15 of the GCs share the LMC rotation derived from HST and Gaia DR2 proper motions. This outcome reveals that the LMC disc existed since the very early epoch of the galaxy formation and experienced the steep relatively fast chemical enrichment shown by its GC metallicities. The four remaining GCs turned out to have circular velocities not compatible with an in situ cluster formation, but rather with being stripped from the SMC.

Abstract Copyright: © 2018 The Author(s) Published by Oxford University Press on behalf of the Royal Astronomical Society

Journal keyword(s): galaxies: individual: LMC - galaxies: star clusters: general

Nomenclature: Table 1: [PHC2018] NGC 1928-NN (Nos 1-11), [PHC2018] NGC 1939-NN (Nos 1-15).

Simbad objects: 44

goto Full paper

goto View the references in ADS

Number of rows : 44
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 SMC G 00 52 38.0 -72 48 01   2.79 2.2     ~ 12317 1
2 NGC 1466 GlC 03 44 32.71 -71 40 18.0   11.6 11.59     ~ 166 0
3 NAME Ret GlC 04 36 10.15 -58 51 34.8   14.00 14.25 13.50   ~ 177 1
4 NGC 1841 GlC 04 45 24.38 -83 59 53.3   12.23 11.43     ~ 190 0
5 NGC 1754 Cl* 04 54 18.080 -70 26 32.58   12.32 11.57     ~ 96 0
6 NGC 1786 Cl* 04 59 07.470 -67 44 45.44   10.1       ~ 152 0
7 NGC 1835 Cl* 05 05 09.210 -69 24 20.96   11.314 10.596     ~ 173 0
8 NGC 1898 As* 05 16 45.380 -69 39 16.76   12.62 11.86     ~ 104 0
9 NGC 1916 Cl* 05 18 37.87 -69 24 22.9   11.16 10.38     ~ 94 0
10 [PHC2018] NGC 1928-10 RG* 05 20 51.917 -69 28 49.07           ~ 1 0
11 [PHC2018] NGC 1928-1 RG* 05 20 52.151 -69 28 33.23           ~ 1 0
12 [PHC2018] NGC 1928-11 RG* 05 20 54.660 -69 29 11.87           ~ 1 0
13 [PHC2018] NGC 1928-2 RG* 05 20 55.293 -69 28 54.95           ~ 1 0
14 NGC 1928 Cl* 05 20 55.940 -69 28 34.96   13.34 12.47     ~ 68 0
15 [PHC2018] NGC 1928-3 RG* 05 20 56.200 -69 28 34.49           ~ 1 0
16 [PHC2018] NGC 1928-4 RG* 05 20 57.784 -69 28 22.32           ~ 1 0
17 2MASS J05205789-6928510 RG* 05 20 57.9138318864 -69 28 51.120705432       16.26   ~ 2 0
18 [PHC2018] NGC 1928-6 RG* 05 20 58.875 -69 28 17.73           ~ 1 0
19 2MASS J05210039-6928455 RG* 05 21 00.398 -69 28 45.57       16.29   ~ 2 0
20 [PHC2018] NGC 1928-8 RG* 05 21 01.248 -69 28 19.55           ~ 1 0
21 [PHC2018] NGC 1928-9 RG* 05 21 03.273 -69 28 20.01           ~ 1 0
22 [PHC2018] NGC 1939-1 RG* 05 21 21.438 -69 56 41.75           ~ 1 0
23 [PHC2018] NGC 1939-13 RG* 05 21 21.4580676456 -69 57 11.814192720           ~ 1 0
24 [PHC2018] NGC 1939-7 RG* 05 21 22.140 -69 57 08.05           ~ 1 0
25 [PHC2018] NGC 1939-14 RG* 05 21 22.496 -69 57 04.60           ~ 1 0
26 [PHC2018] NGC 1939-2 RG* 05 21 24.238 -69 56 31.34           ~ 1 0
27 OGLE LMC-CEP-1688 cC* 05 21 24.4277190976 -69 56 34.180127673   17.037 16.379   15.589 ~ 18 0
28 [PHC2018] NGC 1939-3 RG* 05 21 24.633 -69 57 14.79           ~ 1 0
29 [PHC2018] NGC 1939-9 RG* 05 21 26.1182085288 -69 57 18.199973556           ~ 1 0
30 [PHC2018] NGC 1939-10 RG* 05 21 26.214 -69 56 35.10           ~ 1 0
31 NGC 1939 Cl* 05 21 26.82 -69 56 59.0   12.52 11.83     ~ 61 0
32 [PHC2018] NGC 1939-11 RG* 05 21 26.9733853560 -69 57 28.023314688           ~ 1 0
33 OGLE LMC-LPV-45289 RG* 05 21 28.8196246248 -69 57 14.770317024     16.451   15.118 ~ 2 0
34 [PHC2018] NGC 1939-5 RG* 05 21 29.257 -69 57 23.75           ~ 1 0
35 [PHC2018] NGC 1939-6 RG* 05 21 30.163 -69 57 29.68           ~ 1 0
36 [PHC2018] NGC 1939-15 RG* 05 21 32.232 -69 56 43.23           ~ 1 0
37 [PHC2018] NGC 1939-12 RG* 05 21 32.508 -69 57 06.55           ~ 1 0
38 NAME LMC Bar PoG 05 22 08 -69 23.5           ~ 343 0
39 NAME LMC G 05 23 34.6 -69 45 22     0.4     ~ 19090 0
40 NGC 2005 Cl* 05 30 08.500 -69 45 14.42   12.30 11.57     ~ 103 0
41 NGC 2019 Cl* 05 31 56.48 -70 09 32.5   10.9 10.86     ~ 124 0
42 NGC 2210 GlC 06 11 31.296 -69 07 17.04   10.9 10.94     ~ 196 0
43 NAME Hodge 11 GlC 06 14 22.92 -69 50 54.9   12.57 11.93     ~ 117 0
44 NGC 2257 Cl* 06 30 12.62 -64 19 40.0   13.24 12.62     ~ 228 0

To bookmark this query, right click on this link: simbad:objects in 2018MNRAS.481...49P and select 'bookmark this link' or equivalent in the popup menu