2016A&A...588A.120C


C.D.S. - SIMBAD4 rel 1.7 - 2020.07.05CEST06:23:57

2016A&A...588A.120C - Astronomy and Astrophysics, volume 588A, 120-120 (2016/4-1)

Abundances and kinematics for ten anticentre open clusters.

CANTAT-GAUDIN T., DONATI P., VALLENARI A., SORDO R., BRAGAGLIA A. and MAGRINI L.

Abstract (from CDS):

Context. Open clusters are distributed all across the Galactic disk and are convenient tracers of its properties. In particular, outer disk clusters bear a key role in the investigation of the chemical evolution of the Galactic disk.
Aims. The goal of this study is to derive homogeneous elemental abundances for a sample of ten outer disk open clusters, and investigate possible links with disk structures such as the Galactic anticentre stellar structure.
Methods. We analysed high-resolution spectra of red giants, obtained from the Keck-HIRES and VLT-UVES archives. We derived elemental abundances and stellar atmosphere parameters by means of the classical equivalent width method. We also performed orbit integrations using proper motions.
Results. The Fe abundances we derive trace a shallow negative radial metallicity gradient of slope -0.027±0.007dex/kpc in the outer 12kpc of the disk. The [α/Fe] gradient appears flat, with a slope of 0.006±0.007dex/kpc. The two outermost clusters (Be 29 and Sau 1) appear to follow elliptical orbits. The cluster Be 20 also exhibits a peculiar orbit with a large excursion above the plane.
Conclusions. The irregular orbits of the three most metal poor clusters (two of which are located at the edge of the Galactic disk), are compatible with an inside-out formation scenario for the Milky Way in which extragalactic material is accreted onto the outer disk. This is the case if the irregular orbits of these clusters are confirmed by more robust astrometric measurements such as those of the Gaia mission. We cannot determine whether Be 20, Be 29, and Sau 1 are of extragalactic origin, as they may be old, genuine Galactic clusters whose orbits were perturbed by accretion events or minor mergers in the past 5Gyr, or they may be representants of the thick disk population. The nature of these objects is intriguing and deserves further investigation in the near future.

Abstract Copyright: © ESO, 2016

Journal keyword(s): stars: abundances - Galaxy: disk - open clusters and associations: general

VizieR on-line data: <Available at CDS (J/A+A/588/A120): table1.dat table2.dat table.dat>

CDS comments: Table A.1 stars in Cl Ruprecht 4 have not the same identifier in SIMBAD, found by coordinates : CC18 is Cl* Ruprecht 4 CGB 3, CC29 is Cl* Ruprecht 4 CGB 4, CC3 is Cl* Ruprecht 4 CGB 8, CC4 is Cl* Ruprecht 4 CGB 18, CC8 is Cl* Ruprecht 4 CGB 29. In Cl* Berkeley 73 : CC14 is Cl* Berkeley 73 CGM 15 and CC15 is Cl* Berkeley 73 CGM 16.

Simbad objects: 66

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Number of rows : 66

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2020
#notes
1 Cl* Berkeley 66 GC 785 * 03 04 02.90 +58 43 57.0     18.23     K1III 2 0
2 Cl Berkeley 66 OpC 03 04 04 +58 44.4           ~ 52 0
3 Cl* Berkeley 66 GC 934 * 03 04 06.41 +58 43 31.0     18.23     K1III 2 0
4 * ome01 Tau PM* 04 09 09.9663853612 +19 36 33.178733675   6.581 5.504     K2III 118 0
5 NAME LMC G 05 23 34.6 -69 45 22     0.4     ~ 14826 1
6 Cl* Berkeley 20 SBR 1403 * 05 32 05.6000170760 +00 12 43.930314625     15.88   14.53 ~ 2 0
7 Cl* Berkeley 20 SBR 1201 * 05 32 36.7627679845 +00 11 04.839727116     16.177     ~ 8 0
8 Cl Berkeley 20 OpC 05 32 37.0 +00 11 18           ~ 99 0
9 Cl* Berkeley 20 SBR 1240 * 05 32 38.9518220913 +00 11 20.367886591     15.154     ~ 12 0
10 Cl* Berkeley 20 SBR 1666 * 05 32 46.4055987149 +00 15 52.225459621     15.919   14.673 ~ 2 0
11 Cl* Berkeley 20 SBR 1716 * 05 32 50.057 +00 16 16.43     15.447   14.00 ~ 1 0
12 Cl* Berkeley 20 SBR 1519 * 05 32 54.9519091131 +00 14 07.351889769     16.32   15.09 ~ 2 0
13 NAME Gal Anticenter reg 05 46 +28.9           ~ 720 0
14 Cl Berkeley 22 OpC 05 58.4 +07 50           ~ 63 0
15 Cl* Berkeley 22 K 579 * 05 58 25.78 +07 45 31.2   18.538 16.876     K0III 3 0
16 Cl* Berkeley 22 K 414 * 05 58 25.90 +07 46 11.4   17.636 15.762   13.738 ~ 8 0
17 Cl* Berkeley 22 K 400 * 05 58 30.97 +07 46 15.3   18.275 16.695     G8III 3 0
18 Cl* Berkeley 73 CGM 12 * 06 21 54.9152865196 -06 17 51.801163490   16.30 15.30   13.93 ~ 3 0
19 Cl* Berkeley 73 CGM 13 * 06 21 55.3913626724 -06 20 09.830313564   16.10 15.36   14.30 ~ 3 0
20 Cl* Berkeley 73 CGM 19 * 06 21 57.2597559830 -06 17 15.267624561   16.74 16.03   14.95 ~ 3 0
21 Cl* Berkeley 73 CGM 16 * 06 22 01.130 -06 19 17.14   16.86 15.84   14.48 ~ 3 0
22 Cl* Berkeley 73 CGM 18 * 06 22 02.0057858614 -06 19 21.457206056   17.10 15.99   14.58 ~ 3 0
23 Cl Berkeley 73 OpC 06 22 06 -06 19.0           ~ 33 0
24 Cl* Berkeley 73 CGM 15 * 06 22 10.4374333954 -06 19 29.465909102   16.51 15.57   14.30 ~ 4 0
25 Cl* Ruprecht 4 CGB 3 * 06 48 51.6911406642 -10 30 20.534976415   15.46 14.24   12.69 ~ 3 0
26 Cl* Ruprecht 4 CGB 18 * 06 48 54.5815181544 -10 33 20.286110745   16.62 15.44   13.90 ~ 3 0
27 Cl* Ruprecht 4 CGB 8 * 06 48 55.44 -10 31 31.4   15.94 14.77   13.26 ~ 3 0
28 Cl* Berkeley 75 CGM 22 * 06 48 55.850 -24 00 07.16   17.08 16.13   14.99 ~ 3 0
29 C 0646-104 OpC 06 48 58 -10 30.6           ~ 29 0
30 Cl* Ruprecht 4 CGB 29 * 06 48 57.870 -10 30 27.09   17.29 15.95   14.25 ~ 3 0
31 Cl* Ruprecht 4 CGB 4 * 06 49 00.800 -10 31 57.81   15.60 14.30   12.68 ~ 3 0
32 Cl Berkeley 75 OpC 06 49 01.0 -23 59 48           ~ 40 0
33 Cl* Berkeley 75 CGM 9 * 06 49 07.1018654835 -23 59 44.989933406   15.78 14.89   13.71 ~ 3 0
34 Cl* Berkeley 29 BHT 602 * 06 52 55.4751675400 +16 57 39.621171776           ~ 7 0
35 Cl* Berkeley 29 K 412 * 06 53 01.5859901123 +16 56 21.422393181   17.622 16.639     ~ 10 0
36 EPIC 202065158 V* 06 53 03.4327445549 +16 55 08.520441649     16.56   15.51 G6III 8 0
37 Cl Berkeley 29 OpC 06 53 04.2 +16 55 39   14.3       ~ 139 0
38 UCAC4 535-035484 V* 06 53 04.315 +16 55 39.57   17.581 16.609 16.22   ~ 10 0
39 Cl* Berkeley 29 BHT 933 * 06 53 04.4695068084 +16 57 45.006682558   17.435 16.447     ~ 7 0
40 Cl* Berkeley 29 BHT 1024 * 06 53 07.1154093548 +16 57 12.963899867   16.091 14.616     ~ 10 0
41 Cl* Berkeley 29 K 801 * 06 53 08.0626882631 +16 55 40.579626702   17.542 16.579     G6III 12 0
42 Cl Berkeley 33 OpC 06 57 42 -13 13.0           ~ 61 0
43 2MASS J06574308-1312176 RG* 06 57 43.0853855154 -13 12 17.658653768   16.02 14.58   12.71 ~ 5 0
44 Cl* Ruprecht 7 CGB 2 * 06 57 50.1562702805 -13 13 40.225098643   15.47 14.07   12.71 ~ 4 0
45 Cl* Ruprecht 7 CGB 7 * 06 57 52.8617796149 -13 12 54.961683009   16.41 15.07   12.25 ~ 4 0
46 Cl* Ruprecht 7 CGB 6 * 06 57 53.6350572737 -13 12 57.845353335   16.24 14.79   12.91 ~ 4 0
47 2MASS J06575454-1313587 RG* 06 57 54.5501153740 -13 13 58.732857869   16.17 14.78   12.95 ~ 6 0
48 Cl* Tombaugh 2 PJM 162 * 07 03 01.5940783926 -20 47 59.583526531   17.302 16.131   14.813 ~ 4 0
49 Cl* Tombaugh 2 KKKM 55 * 07 03 03.5244647043 -20 48 48.243151344   17.401 16.161   14.750 ~ 4 0
50 C 0701-207 OpC 07 03 05.0 -20 49 00           ~ 106 0
51 Cl* Tombaugh 2 KKKM 50 * 07 03 07.7813098106 -20 46 17.273523579   17.296 16.099   14.758 ~ 4 0
52 Cl* Tombaugh 2 KKKM 44 * 07 03 09.7087251662 -20 45 49.039618624   17.232 16.018   14.651 ~ 4 0
53 2MASS J07032050-2046476 RG* 07 03 20.4974377744 -20 46 47.638425710     16.160   14.724 ~ 3 0
54 NAME Saurer A Cluster OpC 07 20.9 +01 48           ~ 54 0
55 2MASS J07205485+0147531 * 07 20 54.8609365139 +01 47 53.088498884           ~ 6 0
56 2MASS J07205717+0148454 * 07 20 57.1766383866 +01 48 45.375847356           ~ 6 0
57 HD 82106 PM* 09 29 54.8254745613 +05 39 18.479206637 9.071 8.223 7.197 6.626 6.13 K3V 189 0
58 Cl Trumpler 20 OpC 12 39 45 -60 38.1     10.1     ~ 71 0
59 NGC 4815 OpC 12 58 01 -64 57.6   9.61 8.6     ~ 68 0
60 NAME Gal Center reg 17 45 40.04 -29 00 28.1           ~ 11533 0
61 NGC 6705 OpC 18 51 05 -06 16.2   6.32 5.8     ~ 354 0
62 NAME SDG G 18 55 03.1 -30 28 42   4.5 3.6     ~ 1737 2
63 Cl Berkeley 81 OpC 19 01 37 -00 27.6           ~ 48 0
64 NAME Local Group GrG ~ ~           ~ 6970 0
65 NAME Monoceros Stream St* ~ ~           ~ 311 0
66 NAME Galactic Bar reg ~ ~           ~ 892 0

    Equat.    Gal    SGal    Ecl

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2020.07.05-06:23:57

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