2021A&A...652A.157G

Query : 2021A&A...652A.157G

2021A&A...652A.157G - Astronomy and Astrophysics, volume 652A157-157 (2021/8-1)

CAPOS: The bulge Cluster APOgee Survey. I. Overview and initial ASPCAP results.

GEISLER D., VILLANOVA S., O'CONNELL J.E., COHEN R.E., MONI BIDIN C., FERNANDEZ-TRINCADO J.G., MUNOZ C., MINNITI D., ZOCCALI M., ROJAS-ARRIAGADA A., CONTRERAS RAMOS R., CATELAN M., MAURO F., CORTES C., FERREIRA LOPES C.E., ARENTSEN A., STARKENBURG E., MARTIN N.F., TANG B., PARISI C., ALONSO-GARCIA J., GRAN F., CUNHA K., SMITH V., MAJEWSKI S.R., JONSSON H., GARCIA-HERNANDEZ D.A., HORTA D., MESZAROS S., MONACO L., MONACHESI A., MUNOZ R.R., BROWNSTEIN J., BEERS T.C., LANE R.R., BARBUY B., SOBECK J., HENAO L., GONZALEZ-DIAZ D., MIRANDA R.E., REINARZ Y. and SANTANDER T.A.

Abstract (from CDS):


Context. Bulge globular clusters (BGCs) are exceptional tracers of the formation and chemodynamical evolution of this oldest Galactic component. However, until now, observational difficulties have prevented us from taking full advantage of these powerful Galactic archeological tools.
Aims. CAPOS, the bulge Cluster APOgee Survey, addresses this key topic by observing a large number of BGCs, most of which have only been poorly studied previously. Even their most basic parameters, such as metallicity, [α/Fe], and radial velocity, are generally very uncertain. We aim to obtain accurate mean values for these parameters, as well as abundances for a number of other elements, and explore multiple populations. In this first paper, we describe the CAPOS project and present initial results for seven BGCs.
Methods. CAPOS uses the APOGEE-2S spectrograph observing in the H band to penetrate obscuring dust toward the bulge. For this initial paper, we use abundances derived from ASPCAP, the APOGEE pipeline.
Results. We derive mean [Fe/H] values of -0.85±0.04 (Terzan 2), -1.40±0.05 (Terzan 4), -1.20±0.10 (HP 1), -1.40±0.07 (Terzan 9), -1.07±0.09 (Djorg 2), -1.06±0.06 (NGC 6540), and -1.11±0.04 (NGC 6642) from three to ten stars per cluster. We determine mean abundances for eleven other elements plus the mean [α/Fe] and radial velocity. CAPOS clusters significantly increase the sample of well-studied Main Bulge globular clusters (GCs) and also extend them to lower metallicity. We reinforce the finding that Main Bulge and Main Disk GCs, formed in situ, have [Si/Fe] abundances slightly higher than their accreted counterparts at the same metallicity. We investigate multiple populations and find our clusters generally follow the light-element (anti)correlation trends of previous studies of GCs of similar metallicity. We finally explore the abundances of the iron-peak elements Mn and Ni and compare their trends with field populations.
Conclusions. CAPOS is proving to be an unprecedented resource for greatly improving our knowledge of the formation and evolution of BGCs and the bulge itself.

Abstract Copyright: © ESO 2021

Journal keyword(s): stars: abundances - Galaxy: bulge - globular clusters: general

Simbad objects: 55

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Number of rows : 55
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 NGC 288 GlC 00 52 45.24 -26 34 57.4   10 8.13     ~ 1130 0
2 NAME Magellanic Clouds GrG 03 00 -71.0           ~ 7988 0
3 Cl Ruprecht 106 GlC 12 38 40.20 -51 09 01.0           ~ 413 0
4 M 107 GlC 16 32 31.86 -13 03 13.6           ~ 835 0
5 M 10 GlC 16 57 09.05 -04 06 01.1     4.98     ~ 857 0
6 NGC 6256 GlC 16 59 32.68 -37 07 17.1           ~ 182 0
7 M 62 GlC 17 01 12.60 -30 06 44.5           ~ 668 0
8 M 19 GlC 17 02 37.69 -26 16 04.6   8.45 5.57     ~ 406 1
9 NGC 6284 GlC 17 04 28.747 -24 45 51.22   10.72 7.43     ~ 302 0
10 NGC 6293 GlC 17 10 10.42 -26 34 54.2           ~ 309 0
11 NGC 6304 GlC 17 14 32.25 -29 27 43.3           ~ 394 0
12 NGC 6316 GlC 17 16 37.42 -28 08 24.0   10.33 9.03     ~ 247 0
13 NGC 6325 GlC 17 17 59.27 -23 45 57.7           ~ 190 0
14 NGC 6342 GlC 17 21 10.14 -19 35 14.7     10.01     ~ 310 0
15 NGC 6355 GlC 17 23 58.65 -26 21 12.3   12.46 11.05     ~ 183 0
16 ESO 454-29 GlC 17 27 33.24 -30 48 07.8           ~ 278 0
17 GCl 66.1 GlC 17 30 38.90 -31 35 44.0           ~ 139 0
18 ESO 455-11 GlC 17 31 05.20 -29 58 54.0           ~ 208 0
19 NAME Sequoia Cluster GlC 17 31 12.0 -39 48 30           ~ 154 0
20 Liller 1 Cl* 17 33 24.50 -33 23 20.0           ~ 311 0
21 NGC 6380 GlC 17 34 28.00 -39 04 09.0           ~ 175 0
22 ESO 455-23 GlC 17 35 47.80 -30 28 11.0           ~ 285 0
23 NAME Tonantzintla 2 GlC 17 36 10.500 -38 33 12.00           ~ 115 0
24 NGC 6401 GlC 17 38 36.93 -23 54 31.5   11.31 10.71     ~ 203 0
25 ESO 520-21 GlC 17 43 42.20 -26 13 21.0           ~ 211 0
26 NAME Galactic Center reg 17 45 39.60213 -29 00 22.0000           ~ 16269 0
27 NAME cl Djorgovski 1 GlC 17 47 28.30 -33 03 56.0           ~ 97 0
28 Cl Terzan 5 Cl* 17 48 05.00 -24 46 48.0           ~ 948 1
29 NGC 6440 GlC 17 48 52.67 -20 21 34.5           ~ 592 0
30 NGC 6441 GlC 17 50 13.06 -37 03 05.2           ~ 940 0
31 Cl Terzan 6 GlC 17 50 47.02873 -31 16 29.6900           ~ 214 0
32 NGC 6453 GlC 17 50 51.77 -34 35 55.1   10.49       ~ 189 0
33 NAME UKS 1 GlC 17 54 27.20 -24 08 43.0           ~ 118 0
34 [MGA2017] 51 Gl? 18 00 42.5 -27 10 18           ~ 3 0
35 GCl 80.1 GlC 18 01 38.80 -26 50 23.0           ~ 143 0
36 ESO 456-38 GlC 18 01 49.10 -27 49 33.0           ~ 120 0
37 ESO 521-16 GlC 18 02 57.40 -26 04 00.0           ~ 123 0
38 NGC 6522 GlC 18 03 34.08 -30 02 02.3           ~ 569 0
39 NGC 6528 GlC 18 04 49.61 -30 03 20.8   12.12 10.65     ~ 561 0
40 NGC 6540 GlC 18 06 08.60 -27 45 55.0           ~ 145 0
41 NGC 6544 GlC 18 07 20.58 -24 59 50.4   11.36 9.90     ~ 332 0
42 NGC 6553 GlC 18 09 15.68 -25 54 27.9   9.08       ~ 644 0
43 NAME 2MASS-GC02 GlC 18 09 36.5 -20 46 44           ~ 67 0
44 NGC 6558 GlC 18 10 17.6 -31 45 50           ~ 265 0
45 ESO 522-1 GlC 18 12 15.80 -22 44 31.0     14.86     ~ 114 1
46 NGC 6569 GlC 18 13 38.88 -31 49 35.2   10.78 9.47     ~ 276 0
47 ESO 456-78 GlC 18 14 06.600 -28 38 06.00           ~ 82 0
48 NGC 6624 GlC 18 23 40.51 -30 21 39.7           ~ 939 1
49 M 28 GlC 18 24 32.89 -24 52 11.4           ~ 821 0
50 NGC 6638 GlC 18 30 56.25 -25 29 47.1   10.81 9.68     ~ 258 0
51 NGC 6642 GlC 18 31 54.23 -23 28 34.1   11.30 10.24     ~ 240 0
52 M 22 GlC 18 36 23.94 -23 54 17.1           ~ 1459 0
53 NGC 6717 GlC 18 55 06.04 -22 42 05.3           ~ 273 0
54 NAME Gaia Enceladus-Sausage St* ~ ~           ~ 860 0
55 NAME Galactic Bulge reg ~ ~           ~ 4794 0

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