2019A&A...624L...9S


C.D.S. - SIMBAD4 rel 1.7 - 2021.04.18CEST23:21:46

2019A&A...624L...9S - Astronomy and Astrophysics, volume 624, L9-9 (2019/4-1)

Gaia DR2 orbital properties for field stars with globular cluster-like CN band strengths.

SAVINO A. and POSTI L.

Abstract (from CDS):


Context. Large spectroscopic surveys of the Milky Way have revealed that a small population of stars in the halo have light element abundances comparable to those found in globular clusters. The favoured explanation for the peculiar abundances of these stars is that they originated inside a globular cluster and were subsequently lost.
Aims. Using orbit calculations we assess the likelihood that an existing sample of 57 field stars with globular cluster-like CN band strength originated in any of the currently known Milky Way globular clusters.
Methods. Using Sloan Digital Sky Survey and Gaia data, we determine orbits and integrals of motion of our sample of field stars, and use these values and metallicity to identify likely matches to globular clusters. The pivot hypothesis is that had these stars been stripped from such objects, they would have remained on very similar orbits.
Results. We find that ∼70% of the sample of field stars have orbital properties consistent with the halo of the Milky Way; however, only 20 stars have likely orbital associations with an existing globular cluster. The remaining ∼30% of the sample have orbits that place them in the outer Galactic disc. No cluster of similar metallicity is known on analogous disc orbits.
Conclusions. The orbital properties of the halo stars seem to be compatible with the globular cluster escapee scenario. The stars in the outer disc are particularly surprising and deserve further investigation to establish their nature.

Abstract Copyright: © ESO 2019

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

Simbad objects: 94

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Number of rows : 94

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2021
#notes
1 SDSS J004200.24+245453.8 RG* 00 42 00.24168 +24 54 53.8272           ~ 2 0
2 2MASS J00440253+2403038 RG* 00 44 02.5257322897 +24 03 03.817618310           ~ 3 0
3 NGC 288 GlC 00 52 45.24 -26 34 57.4   10 8.13     ~ 947 0
4 NGC 362 GlC 01 03 14.26 -70 50 55.6     6.58     ~ 970 0
5 2MASS J01144096+1422277 RG* 01 14 40.9778335064 +14 22 27.728079309           ~ 3 0
6 2MASS J01153820+3231304 RG* 01 15 38.2033599835 +32 31 30.326164451           ~ 3 0
7 2MASS J01154862+2427271 RG* 01 15 48.6165021043 +24 27 27.170892133           ~ 5 0
8 2MASS J01372009+2242284 RG* 01 37 20.1032489027 +22 42 28.390335955           ~ 4 0
9 2MASS J01492473+1500454 RG* 01 49 24.7406068300 +15 00 45.473741183           ~ 4 0
10 2MASS J02520847+3138514 RG* 02 52 08.4782920070 +31 38 51.602366939           ~ 2 0
11 2MASS J02582749+3805085 RG* 02 58 27.4962939186 +38 05 08.434158304           ~ 4 0
12 NGC 1261 GlC 03 12 16.21 -55 12 58.4     8.63     ~ 441 0
13 Cl Pal 1 GlC 03 33 20.04 +79 34 51.8   17.2       ~ 208 1
14 NGC 1851 GlC 05 14 06.76 -40 02 47.6   8.80 7.23     ~ 1275 0
15 M 79 GlC 05 24 10.59 -24 31 27.3   9.21 8.16     ~ 734 0
16 2MASS J05261590+6119455 RG* 05 26 15.9244221609 +61 19 45.508891877           ~ 3 0
17 NAME Gal Anticenter reg 05 46 +28.9           ~ 757 0
18 2MASS J06114626+6326237 RG* 06 11 46.2682146828 +63 26 23.757376284           ~ 4 0
19 2MASS J06441196+2753516 RG* 06 44 11.9679000405 +27 53 51.661715601           ~ 3 0
20 NGC 2298 GlC 06 48 59.41 -36 00 19.1   10.77 8.89     ~ 441 0
21 2MASS J07055044+2928560 RG* 07 05 50.4524424383 +29 28 56.067636308           ~ 3 0
22 2MASS J07071102+2916290 RG* 07 07 11.0250080885 +29 16 29.077191190           ~ 3 0
23 2MASS J08155000+3700111 RG* 08 15 49.9957305091 +37 00 11.162390202           ~ 5 0
24 2MASS J08221376+6515075 RG* 08 22 13.7738676254 +65 15 07.553877844           ~ 3 0
25 2MASS J08254252+1516539 RG* 08 25 42.5226836762 +15 16 53.950836174           ~ 3 0
26 2MASS J08265001+1539507 RG* 08 26 50.0159129484 +15 39 50.668191384           ~ 3 0
27 2MASS J08342350+1243244 RG* 08 34 23.5122509434 +12 43 24.404673465           ~ 5 0
28 2MASS J08534208+3647239 RG* 08 53 42.0749262288 +36 47 23.966823880           ~ 4 0
29 2MASS J08545553+3729278 RG* 08 54 55.5415060894 +37 29 27.852037328           ~ 5 0
30 NGC 2808 GlC 09 12 03.10 -64 51 48.6   7.77 5.69     ~ 1285 0
31 NAME E 3 GlC 09 20 57.07 -77 16 54.8           ~ 137 0
32 2MASS J09351274+4201155 RG* 09 35 12.7508554845 +42 01 15.506914909           ~ 4 0
33 2MASS J10164973+1742215 RG* 10 16 49.7220821313 +17 42 21.675854301           ~ 4 0
34 2MASS J10282624+1754488 RG* 10 28 26.2539097193 +17 54 48.877759341           ~ 5 0
35 SDSS J105019.08+005105.6 RG* 10 50 19.08648 +00 51 05.6340           ~ 2 0
36 2MASS J11582653+0430478 RG* 11 58 26.5387653069 +04 30 47.872835640           ~ 4 0
37 2MASS J11595755+0447245 RG* 11 59 57.5406862387 +04 47 24.613742214           KIII 4 0
38 NGC 4147 GlC 12 10 06.149 +18 32 31.78   11.45 10.74     ~ 508 0
39 SDSS J124900.15+101726.9 RG* 12 49 00.15768 +10 17 26.9376           ~ 3 0
40 SDSS J125224.31+193358.3 RG* 12 52 24.31728 +19 33 58.2912           ~ 3 0
41 SDSS J131447.33+010356.4 RG* 13 14 47.33592 +01 03 56.4588           ~ 3 0
42 NGC 5286 GlC 13 46 26.81 -51 22 27.3   9.18 8.31     ~ 380 0
43 NGC 5634 GlC 14 29 37.28 -05 58 35.1   10.69 10.05     ~ 258 0
44 2MASS J14502225+3858445 RG* 14 50 22.2692101921 +38 58 44.492019123           ~ 4 0
45 IC 4499 GlC 15 00 18.57 -82 12 49.6     8.56     ~ 318 0
46 2MASS J15004810+1126538 RG* 15 00 48.1085796693 +11 26 53.930357860           ~ 4 0
47 NGC 5897 GlC 15 17 24.40 -21 00 36.4   10.16 8.52     ~ 347 0
48 M 5 GlC 15 18 33.22 +02 04 51.7   7.34 5.95     ~ 1812 0
49 2MASS J15263554+5106075 RG* 15 26 35.5391217956 +51 06 07.545052586           ~ 3 0
50 NGC 5946 GlC 15 35 28.58 -50 39 35.0   11.98 10.72     ~ 170 0
51 ESO 224-8 OpC 15 39 05.4 -50 03 02           ~ 54 0
52 2MASS J16032758+1733487 RG* 16 03 27.5669042061 +17 33 48.605539347           ~ 4 0
53 2MASS J16053197+0440311 RG* 16 05 31.9743548326 +04 40 31.122266320           ~ 4 0
54 2MASS J16070923+0447126 RG* 16 07 09.2311774452 +04 47 12.736856597           ~ 5 0
55 2MASS J16074357+0550292 RG* 16 07 43.5722194352 +05 50 29.160247150           ~ 4 0
56 2MASS J16101343+0524036 RG* 16 10 13.4326499344 +05 24 03.659672697           ~ 4 0
57 2MASS J16111138+1647313 RG* 16 11 11.3784672740 +16 47 31.278540452           ~ 4 0
58 2MASS J16194392+1631108 RG* 16 19 43.9185048069 +16 31 10.923006033           ~ 5 0
59 2MASS J16224214+3150357 RG* 16 22 42.1437874612 +31 50 35.695493327           ~ 2 0
60 M 4 GlC 16 23 35.22 -26 31 32.7           ~ 1709 0
61 M 13 GlC 16 41 41.634 +36 27 40.75     5.8     ~ 2042 0
62 NGC 6229 GlC 16 46 58.641 +47 31 36.38   9.38 9.86     ~ 324 0
63 NAME 2MASS-GC03 GlC 16 52 10.602 -47 03 29.00           ~ 40 0
64 GCl 50 GlC 16 59 51.1 -00 32 00   15.70       ~ 170 1
65 NGC 6284 GlC 17 04 28.747 -24 45 51.22   10.72 7.43     ~ 245 0
66 SDSS J171930.93+274119.0 RG* 17 19 30.93096 +27 41 19.0104           ~ 3 0
67 IC 1257 Bz? 17 27 06.00 -07 05 00.0           ~ 63 0
68 2MASS J17290333+3157007 RG* 17 29 03.3411885923 +31 57 00.714278538           ~ 4 0
69 2MASS J17293112+2649403 RG* 17 29 31.1092749480 +26 49 40.263465221           ~ 5 0
70 2MASS J17305292+3333031 RG* 17 30 52.9229231265 +33 33 03.134810507           ~ 4 0
71 2MASS J17311830+0718204 RG* 17 31 18.3030310657 +07 18 20.398489082           ~ 4 0
72 2MASS J17385753+3248451 RG* 17 38 57.5355845897 +32 48 45.160132136           ~ 5 0
73 NAME cl Djorgovski 1 GlC 17 47 28.30 -33 03 56.0           ~ 60 0
74 ESO 521-16 GlC 18 02 57.40 -26 04 00.0           ~ 79 0
75 NGC 6544 GlC 18 07 20.58 -24 59 50.4   11.36 9.90     ~ 246 0
76 ESO 280-6 GlC 18 09 06.000 -46 25 24.00           ~ 36 0
77 ESO 456-78 GlC 18 14 06.600 -28 38 06.00           ~ 39 0
78 NGC 6584 GlC 18 18 37.60 -52 12 56.8   10.32 8.17     ~ 254 0
79 2MASS J18333744+4019243 RG* 18 33 37.4341943203 +40 19 24.331657798           ~ 3 0
80 M 70 GlC 18 43 12.76 -32 17 31.6   9.76 9.06     ~ 342 0
81 NGC 6723 GlC 18 59 33.15 -36 37 56.1           ~ 443 0
82 M 56 GlC 19 16 35.57 +30 11 00.5   8.90       ~ 374 0
83 2MASS J19270723+6330057 RG* 19 27 07.2499483283 +63 30 05.840301187           ~ 5 0
84 M 75 GlC 20 06 04.841 -21 55 20.14     8.26     ~ 323 0
85 2MASS J20291897+7624592 RG* 20 29 19.0178920777 +76 24 59.303765128           ~ 3 0
86 M 72 GlC 20 53 27.70 -12 32 14.3   9.95 8.96     ~ 378 0
87 M 2 GlC 21 33 27.02 -00 49 23.7     6.25     ~ 924 1
88 2MASS J22424149+1314591 RG* 22 42 41.4826824883 +13 14 59.274777206           ~ 4 0
89 2MASS J22451083+3032516 RG* 22 45 10.8353427894 +30 32 51.611015946           ~ 3 0
90 2MASS J22471943+2321450 RG* 22 47 19.4298336041 +23 21 45.044027298           ~ 3 0
91 NGC 7492 GlC 23 08 26.68 -15 36 41.3     10.48     ~ 266 0
92 2MASS J23414569+0748578 RG* 23 41 45.6973219226 +07 48 57.889255800           ~ 4 0
93 2MASS J23454298+4310430 RG* 23 45 42.9857358923 +43 10 42.992230627           ~ 3 0
94 2MASS J23454971+0050559 RG* 23 45 49.7138023471 +00 50 55.931243276           ~ 5 0

    Equat.    Gal    SGal    Ecl

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2021.04.18-23:21:46

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