2020A&A...643L...4F

Query : 2020A&A...643L...4F

2020A&A...643L...4F - Astronomy and Astrophysics, volume 643, L4-4 (2020/11-1)

Aluminium-enriched metal-poor stars buried in the inner Galaxy.

FERNANDEZ-TRINCADO J.G., BEERS T.C., MINNITI D., TANG B., VILLANOVA S., GEISLER D., PEREZ-VILLEGAS A. and VIEIRA K.

Abstract (from CDS):

Stars with higher levels of aluminium and nitrogen enrichment are often key pieces in the chemical makeup of multiple populations in almost all globular clusters (GCs). There is also compelling observational evidence that some Galactic components could be partially built from dissipated GCs. The identification of such stars among metal-poor field stars may therefore provide insight into the composite nature of the Milky Way (MW) bulge and inner stellar halo, and could also reveal other chemical peculiarities. Here, based on APOGEE spectra, we report the discovery of 29 mildly metal-poor ([Fe/H]≤-0.7) stars with stellar atmospheres strongly enriched in aluminium (Al-rich stars: [Al/Fe]≥+0.5), well above the typical Galactic levels, located within the solar radius toward the bulge region, which lies in highly eccentric orbits (e≥0.6). We find many similarities for almost all of the chemical species measured in this work with the chemical patterns of GCs, and therefore we propose that they have likely been dynamically ejected into the bulge and inner halo from GCs formed in situ and/or GCs formed in different progenitors of known merger events experienced by the MW, such as the Gaia-Sausage-Enceladus and/or Sequoia.

Abstract Copyright: © ESO 2020

Journal keyword(s): stars: abundances - stars: chemically peculiar - Galaxy: bulge - globular clusters: general - Galaxy: stellar content - Galaxy: kinematics and dynamics

Simbad objects: 62

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Number of rows : 62
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2024 		#notes
1 NGC 288 GlC 00 52 45.24 -26 34 57.4   10 8.13     ~ 1041 0
2 NGC 362 GlC 01 03 14.26 -70 50 55.6     6.58     ~ 1085 0
3 2MASS J02593571-1731458 RG* 02 59 35.7158926177 -17 31 45.896288533           ~ 7 0
4 NGC 1851 GlC 05 14 06.76 -40 02 47.6           ~ 1429 0
5 M 79 GlC 05 24 10.59 -24 31 27.3     8.16     ~ 817 0
6 TYC 3771-213-1 Pe* 06 57 26.9745175944 +55 43 11.614243332   12.42 11.71     ~ 2 0
7 NGC 2808 GlC 09 12 03.10 -64 51 48.6           ~ 1419 0
8 NGC 3201 GlC 10 17 36.82 -46 24 44.9           ~ 885 0
9 M 53 GlC 13 12 55.25 +18 10 05.4     7.79     ~ 836 0
10 NGC 5139 GlC 13 26 47.28 -47 28 46.1           ~ 3426 0
11 M 3 GlC 13 42 11.62 +28 22 38.2     6.39     ~ 2478 0
12 NGC 5466 GlC 14 05 27.29 +28 32 04.0     9.70     ~ 828 0
13 2MASS J14063545+2734116 Pe* 14 06 35.4399295477 +27 34 11.706574270           ~ 2 0
14 2MASS J15053060+4211466 RG* 15 05 30.6008518920 +42 11 46.648452660           ~ 6 0
15 NAME Serpens Dwarf GlC 15 16 05.30 -00 06 41.0   15.1       ~ 734 1
16 M 5 GlC 15 18 33.22 +02 04 51.7     5.95     ~ 1977 0
17 2MASS J15532396-3509322 * 15 53 23.9613946619 -35 09 32.251702039           ~ 1 0
18 2MASS J15535622+2237419 * 15 53 56.2203152132 +22 37 41.882030646           ~ 2 0
19 2MASS J16035902+0703353 * 16 03 59.0284772285 +07 03 35.252171040           ~ 1 0
20 2MASS J16055435+3003432 Pe* 16 05 54.3511950667 +30 03 43.204397147           ~ 2 0
21 2MASS J16102218-2158014 Pe* 16 10 22.1858568219 -21 58 01.389150182           ~ 4 0
22 2MASS J16112935-2000538 Pe* 16 11 29.3604865483 -20 00 53.857970121           ~ 3 0
23 M 4 GlC 16 23 35.22 -26 31 32.7           ~ 1849 0
24 2MASS J16282719-0050428 RG* 16 28 27.1960188504 -00 50 42.854544312           ~ 7 0
25 M 107 GlC 16 32 31.86 -13 03 13.6           ~ 786 0
26 M 13 GlC 16 41 41.634 +36 27 40.75     5.8     ~ 2192 0
27 2MASS J16443329+3624504 Pe* 16 44 33.2890361712 +36 24 50.336452440           ~ 5 0
28 NGC 6229 GlC 16 46 58.641 +47 31 36.38   9.38 9.86     ~ 366 0
29 M 12 GlC 16 47 14.18 -01 56 54.7     6.07     ~ 676 0
30 M 10 GlC 16 57 09.05 -04 06 01.1     4.98     ~ 789 0
31 2MASS J17254242-1331201 Pe* 17 25 42.4157623437 -13 31 20.084215734           ~ 3 0
32 2MASS J17254298-2106351 Pe* 17 25 42.9818667435 -21 06 35.142662512           ~ 2 0
33 AP J17313399-2640506 LP? 17 31 33.9920290916 -26 40 50.583896534           ~ 4 0
34 2MASS J17343682-2654206 Pe* 17 34 36.8276622176 -26 54 20.730040617           ~ 2 0
35 NGC 6397 GlC 17 40 42.09 -53 40 27.6     5.17     ~ 1975 0
36 2MASS J17425767-2803437 * 17 42 57.67176 -28 03 43.7076           ~ 3 0
37 2MASS J17431262-2843363 * 17 43 12.62904 -28 43 36.3468           ~ 3 0
38 ESO 520-21 GlC 17 43 42.20 -26 13 21.0           ~ 178 0
39 NAME Galactic Center reg 17 45 39.60213 -29 00 22.0000           ~ 14414 0
40 2MASS J17461523-3407127 Pe* 17 46 15.23088 -34 07 12.7092           ~ 2 0
41 2MASS J17475763-2913591 * 17 47 57.63552 -29 13 59.1924           ~ 2 0
42 2MASS J17480799-2712083 * 17 48 07.99008 -27 12 08.3124           ~ 3 0
43 2MASS J17484544-2915516 * 17 48 45.44832 -29 15 51.6204           ~ 3 0
44 ESO 521-16 GlC 18 02 57.40 -26 04 00.0           ~ 99 0
45 NGC 6522 GlC 18 03 34.08 -30 02 02.3           ~ 524 0
46 2MASS J18035017-2552334 * 18 03 50.17776 -25 52 33.4452           ~ 3 0
47 2MASS J18041915-3703227 Pe* 18 04 19.1597950945 -37 03 22.743426207           ~ 2 0
48 NGC 6544 GlC 18 07 20.58 -24 59 50.4   11.36 9.90     ~ 296 0
49 M 22 GlC 18 36 23.94 -23 54 17.1           ~ 1378 0
50 2MASS J18490114-3042332 Pe* 18 49 01.1454599980 -30 42 33.255150815           ~ 3 0
51 2MASS J18524618-2520372 * 18 52 46.1827273982 -25 20 37.220972406           ~ 2 0
52 M 54 GlC 18 55 03.33 -30 28 47.5           ~ 1068 0
53 NGC 6723 GlC 18 59 33.15 -36 37 56.1           ~ 500 0
54 2MASS J19010991-2121082 Pe* 19 01 09.91392 -21 21 08.2908           ~ 3 0
55 NGC 6752 GlC 19 10 52.11 -59 59 04.4           ~ 2000 0
56 M 55 GlC 19 39 59.71 -30 57 53.1     6.49     ~ 853 0
57 M 2 GlC 21 33 27.02 -00 49 23.7     6.25     ~ 1030 1
58 2MASS J21372238+1244305 Pe* 21 37 22.4000599454 +12 44 30.331757284           ~ 3 0
59 2MASS J22015198-1141479 Pe* 22 01 51.9817034460 -11 41 47.844846082           ~ 4 0
60 NAME Galactic Bulge reg ~ ~           ~ 4299 0
61 NAME Gaia Enceladus-Sausage St* ~ ~           ~ 522 0
62 NAME Galactic Bar reg ~ ~           ~ 1219 0

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