2024A&A...692A.130B

Query : 2024A&A...692A.130B

2024A&A...692A.130B - Astronomy and Astrophysics, volume 692A130 (2024/12-1)

Cosmological insights into the early accretion of r-process-enhanced stars II. Dynamical identification of lost members of Reticulum II.

BERCZIK P., ISHCHENKO M., SOBODAR O. and MARDINI M.

Abstract (from CDS):

Aims. We identify the possible dynamical connection between individual r-process-enhanced stars and the ultra-faint dwarf galaxy Reticulum II based on the current phase-space information for these stars and the dynamical mass-loss model of Reticulum II during its orbital motion for 11.5 Gyr of lookback time. The dynamical orbital modelling together with the chemical abundance analysis proved to be useful tools for the progenitor identification of the peculiar stars in our Galaxy.
Methods. To reproduce the Reticulum II orbital mass loss, we used our high-precision N-body φ-GPU code to integrate almost 1 million stars into the system evolution inside a external Galactic potential. We also investigated the orbits of r-process-enhanced stars using the same code.
Results. We present our Reticulum II dynamical modelling results in the context of the stars' energies - angular momentum phase-space and phase-space overlapping of the currently observed r-process-enhanced stars with Reticulum II stellar tidal tails. Of the 530 r stars known today, at least 93 are former members of the Reticulum II dynamical progenitor system.

Abstract Copyright: © The Authors 2024

Journal keyword(s): methods: numerical - stars: chemically peculiar - Galaxy: formation - Galaxy: structure - galaxies: dwarf - galaxies: individual: Reticulum II

Simbad objects: 100

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Number of rows : 100
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 * 85 Peg SB* 00 02 10.3487193861 +27 04 54.599101714 6.47 6.42 5.75 5.16 4.73 G5VbFe-2 568 0
2 BPS CS 22957-0036 Pe* 00 03 31.3531838736 -04 44 22.563601008   14.90 14.5 14.50   ~ 13 0
3 2MASS J00452379-2112161 Pe* 00 45 23.8045890456 -21 12 16.266038508           ~ 4 0
4 HE 0045-2430 Pe* 00 47 40.5536759784 -24 14 01.998962700   15.608 15.019 14.635 14.252 ~ 5 0
5 BD-11 145 Pe* 00 48 24.3140894760 -10 41 30.892554816   11.54 10.72     KIIvw 60 0
6 BPS CS 22958-0037 HB* 01 58 39.6962989704 -57 03 26.935087572   15.38 14.86 14.85   ~ 13 0
7 2MASS J02031860-7930291 Pe* 02 03 18.5800198680 -79 30 29.172469320           ~ 6 0
8 TYC 8048-292-1 SB* 02 07 06.4070914896 -50 09 16.641057168   12.42 11.33     ~ 15 0
9 HD 13979 Pe* 02 15 20.8534060680 -25 54 54.872825148   9.81 9.18     F/Gw 97 0
10 HE 0240-0807 Pe* 02 42 57.7258422024 -07 54 35.382610116   15.867 14.971 14.447 13.889 ~ 18 0
11 UCAC2 26140348 Pe* 02 46 20.1351143184 -15 18 41.856499728   13.20 12.44 12.30 11.44 CEMP 20 0
12 CD-30 1121 Pe* 02 57 00.2888605704 -30 24 37.382171544   11.038 10.312     G0 55 0
13 BPS CS 31079-0028 Pe* 03 01 00.6866893176 +06 16 31.808500140   13.900 13.211 12.713 12.190 ~ 39 0
14 UCAC4 399-003740 Pe* 03 13 37.2672819336 -10 20 55.325394276   12.962 12.090 11.949   CEMP 9 0
15 TYC 9362-1219-1 Pe* 03 15 41.0451253656 -76 26 32.972836668   12.436 11.411     ~ 10 0
16 TYC 7568-1331-1 Pe* 03 21 08.8275621277 -39 44 21.229169552   11.72 10.82 10.44 9.66 ~ 11 0
17 NAME Reticulum II G 03 35 42.1 -54 02 57           ~ 375 0
18 CD-24 1782 Pe* 03 38 41.4850201416 -24 02 50.292102948   10.54 9.97 9.246 8.811 ~ 91 0
19 CPD-65 261 Pe* 03 42 28.1663475648 -65 00 35.605828368   11.847 11.048     ~ 12 0
20 TYC 4724-557-1 Pe* 03 55 09.2800607400 -06 37 10.979094828   12.766 12.44     ~ 15 0
21 TYC 8507-1765-1 Pe* 03 56 37.0353995424 -58 38 28.070925396   12.761 11.450 10.694 10.043 CEMP 20 0
22 UCAC2 29952235 Pe* 04 19 29.6665244184 -05 17 49.160679216   13.133 12.142 11.97 10.91 ~ 12 0
23 HE 0420+0123a Pe* 04 23 14.5447026240 +01 30 48.301016796   12.262 11.483 10.688 10.171 CEMP-no 29 1
24 BPS CS 22186-0025 Pe* 04 24 32.7982834272 -37 09 02.518136460   14.99 14.24 13.740 13.269 ~ 40 0
25 TYC 4746-785-1 Pe* 04 31 54.1204674288 -06 32 10.163103252   11.890 11.310 11.04 10.443 ~ 17 0
26 BD+45 983 PM* 04 47 18.3724123560 +45 59 10.519164852   11.04   9.6   G8:V: 52 0
27 HE 0516-3820 Pe* 05 18 12.9204168000 -38 17 32.704600272     14.377   13.538 ~ 12 0
28 NAME LMC G 05 23 34.6 -69 45 22     0.4     ~ 19090 0
29 2MASS J05241392-0336543 LP* 05 24 13.9298188632 -03 36 54.303249888           ~ 11 0
30 HE 0524-2055 Pe* 05 27 04.4443239912 -20 52 42.096542448     14.013   12.937 ~ 18 0
31 UCAC4 160-005825 Pe* 05 31 17.7917554584 -58 10 04.840769856   13.126 12.445 12.383 11.575 ~ 19 0
32 TYC 9378-79-1 Pe* 05 38 16.9847318880 -75 16 20.706482280   12.026 11.207 10.72 10.153 CEMP 29 0
33 2MASS J05384334-5147228 Pe* 05 38 43.3370560781 -51 47 22.778633031           CEMP 6 0
34 HE 0538-4515 Pe* 05 39 46.1316520152 -45 13 33.080381112     15.700   14.988 ~ 5 0
35 TYC 8534-778-1 Pe* 06 19 50.0171045376 -53 12 11.448975276   12.050 11.369     CEMP 19 0
36 SMSS J062609.83-590503.2 Pe* 06 26 09.8286518496 -59 05 03.067000260           ~ 8 0
37 TYC 7082-1272-1 SB* 06 33 27.7235402760 -35 19 24.206837988   12.168 11.510     ~ 11 0
38 TYC 7094-3072-1 Pe* 07 05 20.2832119848 -33 43 24.296952936   12.558 11.677     CEMP 14 0
39 TYC 7654-2964-1 Pe* 07 50 14.2432126032 -41 23 45.411760104   11.852 11.053     ~ 8 0
40 CD-57 1959 Pe* 08 01 58.9747088568 -57 52 03.154466748   11.507 10.19     Gwl 17 0
41 TYC 6023-31-1 Pe* 08 39 34.6014185424 -21 22 07.151858400   11.426 10.533     ~ 9 0
42 TYC 5456-610-1 Pe* 08 59 40.9352431176 -14 15 15.115290804   12.886 11.936     ~ 10 0
43 TYC 6029-859-1 Pe* 09 26 11.3311160280 -15 26 23.262489420   11.51 10.93     ~ 6 0
44 TYC 3814-1598-1 Pe* 09 54 42.7718004504 +52 46 41.559838968   11.19 10.10     ~ 32 0
45 2MASS J10063414-7030212 Pe* 10 06 34.1495399098 -70 30 21.293474194           ~ 3 0
46 UCAC2 11063799 Pe* 10 34 47.8560681072 -48 23 54.517560792   12.477 11.641 11.46 10.63 ~ 8 0
47 TYC 7710-9-1 Pe* 10 36 26.8769967840 -37 46 17.368869072   12.197 11.053     ~ 9 0
48 SMSS J105320.99-435300.1 Pe* 10 53 20.9544100680 -43 52 59.939519700           ~ 3 0
49 HE 1127-1143 Pe* 11 29 50.6275439136 -12 00 12.581828208     15.885 15.434 15.002 ~ 17 0
50 TYC 5515-351-1 Pe* 11 30 17.0481382224 -14 49 32.583949284   12.40 11.46     ~ 11 0
51 HE 1131+0141 Pe* 11 34 32.1334734504 +01 24 41.762631708     16.101   15.254 ~ 8 0
52 TYC 6086-887-1 Pe* 11 40 49.4448205752 -16 15 39.461256864   11.701 10.652     ~ 10 0
53 TYC 7742-269-1 Pe* 11 59 41.6827448160 -38 20 42.564561612   13.181 12.257     ~ 10 0
54 HD 106373 HB* 12 14 13.2931756272 -28 15 06.555237840   9.33 8.90     F5:Ia:kA3mA3 47 0
55 HD 107752 Pe* 12 22 52.7183284776 +11 36 25.486007148   10.79 10.1     KIIvw 83 0
56 2MASS J12255123-2351074 Pe* 12 25 51.2320886264 -23 51 07.691804232           ~ 3 0
57 TYC 4944-1284-1 * 12 29 26.9486880624 -04 42 32.650608528   12.165 11.092     ~ 10 0
58 CD-31 9774 Pe* 12 34 13.0871379984 -31 49 57.912472884   11.210 10.196 9.55   G5IV 18 0
59 NAME NGP reg 12 51 26.275 +27 07 41.70           ~ 1274 0
60 UCAC4 402-054869 RG* 13 26 17.9206079664 -09 45 17.612887752   14.097 13.284 13.215 12.305 ~ 18 0
61 UCAC4 408-058576 Pe* 13 37 48.8508327672 -08 26 17.605539312   12.767 11.506 11.219 10.146 CEMP 18 0
62 UCAC2 30544966 * 14 10 15.8809645176 -03 43 55.307889084   12.791 12.078 12.06 11.11 ~ 10 0
63 2MASS J14232679-2834200 Pe* 14 23 26.7859641744 -28 34 20.084925468   13.510 12.720 12.2 11.698 ~ 15 0
64 UCAC4 430-058824 Pe* 14 32 26.0674730856 -04 00 30.889143180   14.445 13.646 13.609 12.693 CEMP-mp 13 0
65 BD-20 4079 Pe* 14 43 51.9530498088 -21 06 28.317722904   12.269 10.923     CEMP 9 0
66 BPS BS 16083-0172 Pe* 14 50 41.4358262496 +48 45 13.540748220   13.74 13.13 13.025 12.594 ~ 8 0
67 UCAC2 15298612 Pe* 14 59 29.8187700432 -38 52 55.955377200   12.349 11.082 10.71 9.63 CEMP 13 0
68 BD-05 3985 * 15 00 24.9823656288 -06 13 37.570969452   11.191 10.220     ~ 9 0
69 TYC 5592-563-1 Pe* 15 06 28.6609816632 -14 28 03.951914484   11.68 11.38     ~ 13 0
70 Z 318-18 G 15 09 08.0 +67 13 21   13.60 10.6     ~ 1459 0
71 BPS CS 30306-0132 Pe* 15 14 18.9191634456 +07 27 02.680959780   13.62 12.73 12.421 11.948 ~ 43 0
72 TYC 5014-333-1 * 15 21 10.2665985456 -06 07 56.650483704   11.84 11.24     ~ 9 0
73 UCAC2 27497364 Pe* 15 58 29.6299383600 -12 24 34.448910336   13.18 12.33 12.21 11.20 ~ 18 0
74 SMSS J160447.75-293146.7 Pe* 16 04 47.7562996440 -29 31 46.657695072           ~ 5 0
75 HD 149414 SB* 16 34 42.3538551709 -04 13 44.635969732 10.48 10.37 9.63     G5Ve 210 0
76 BPS CS 22878-0121 HB* 16 47 50.0361976176 +11 39 11.349179748   14.53 14.0     ~ 13 0
77 NAME Galactic Center reg 17 45 39.60213 -29 00 22.0000           ~ 16269 0
78 UCAC2 12329177 Pe* 18 30 13.5435856824 -45 55 10.139575728   12.91 12.06 11.93 11.09 CEMP 16 0
79 2MASS J18364788-2743330 Pe* 18 36 47.8814822112 -27 43 33.044232576           ~ 5 0
80 HD 175305 RG* 18 47 06.4416868934 +74 43 31.451436187 8.07 7.93 7.18 6.52 6.03 G5III 239 0
81 UCAC4 086-060198 Pe* 18 56 27.7533885504 -72 51 33.077357136   13.73 12.73 12.47   ~ 8 0
82 TYC 8773-230-1 Pe* 19 23 25.1843675280 -58 33 41.047906320   12.759 11.829     CEMP 15 0
83 TYC 8391-2145-1 Pe* 19 55 21.5805472944 -46 13 56.959496796   12.883 11.900 11.56 10.81 CEMP 19 0
84 UCAC2 17620467 Pe* 20 50 48.6973199016 -33 55 28.941025656   12.158 11.123 10.99 10.19 CEMP 10 0
85 UCAC4 403-135428 Pe* 21 37 08.0861703360 -09 27 34.614506592   14.505 13.264 12.943   CEMP 16 0
86 TYC 5218-397-1 Pe* 21 46 22.1866538160 -05 12 32.414813316   11.64 10.79     ~ 8 0
87 G 214-1 PM* 21 47 55.6225911408 +33 06 27.161143308       11.3   ~ 25 0
88 NAME Gru II G 22 04.1 -46 26           ~ 110 0
89 UCAC4 464-129364 Pe* 22 16 35.9639920032 +02 46 16.993943220   13.57 12.77 12.57   CEMP-no 19 0
90 BPS CS 22875-0029 HB* 22 29 25.0902184752 -38 57 47.453172408   14.08 13.69     ~ 21 0
91 HE 2229-4153 Pe* 22 32 49.0491790560 -41 38 25.162910736     13.322   12.447 ~ 17 0
92 HE 2242-1930 Pe* 22 45 17.2009274784 -19 14 51.758055708   16.129 15.452 15.036 14.636 ~ 6 0
93 TYC 9125-470-1 Pe* 23 06 09.7777201440 -61 07 36.732144936   11.922 11.027 10.41 9.957 ~ 14 0
94 BPS CS 22888-0047 HB* 23 20 19.8570157800 -33 45 46.924229268   15.01 14.61     ~ 21 0
95 CD-28 18183 Pe* 23 24 27.6735973368 -27 28 05.538207576   11.44 10.64 10.50   ~ 11 0
96 BD-02 5957 Pe* 23 26 52.5880629288 -01 59 24.689307444   12.61 11.38     CEMP 15 0
97 UCAC4 170-210771 Pe* 23 36 22.0259542968 -56 07 49.766385252   14.133   12.644   CEMP 16 0
98 UCAC2 3613819 Pe* 23 41 15.8197411728 -64 06 44.088256584   13.606 12.790 12.69 11.80 ~ 11 0
99 TYC 6982-671-1 Pe* 23 49 09.0467594040 -24 47 17.727035784   12.817 12.120     ~ 7 0
100 NAME Tuc III G 23 56.6 -59 36           ~ 229 0

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