2020ApJ...895...23L

Query : 2020ApJ...895...23L

2020ApJ...895...23L - Astrophys. J., 895, 23-23 (2020/May-3)

Two substructures in the nearby stellar halo found in Gaia and RAVE.

LI H., DU C., YANG Y., NEWBERG H.J., MA J., SHI J. and PIAO Y.

Abstract (from CDS):

We use the second Gaia data release (Gaia DR2), combined with Radial Velocity Experiment spectroscopic surveys, to identify the substructures in the nearby stellar halo. We select 3845 halo stars kinematically and chemically and determine their density distribution in energy and angular momentum space. To select the substructures from overdensities, we reshuffle the velocities and estimate their significance. Two statistically significant substructures, GR-1 and GR-2, are identified. GR-1 has a high binding energy and small z-angular momentum. GR-2 is metal-rich but retrograde. They are both new substructures, and may be accretion debris of dwarf galaxies.

Abstract Copyright: © 2020. The American Astronomical Society. All rights reserved.

Journal keyword(s): Galaxy kinematics - Galaxy stellar halos - Galaxy formation - Galaxy abundances - Galaxy dynamics - Solar neighborhood

Simbad objects: 139

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Number of rows : 139
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 TYC 8841-891-1 SB* 00 34 18.6840086544 -60 27 17.306895744   12.761 11.927     ~ 6 0
2 IRAS 01215-6247 LP* 01 23 18.4026322968 -62 31 21.868854816   11.47 10.127     ~ 7 0
3 TYC 8855-924-1 * 01 23 34.6850358768 -65 26 56.018169816   11.274 10.213     ~ 5 0
4 NAME Sagittarius Stream St* 02 22 +00.0           ~ 1001 0
5 TYC 8135-4075-1 * 07 52 37.6245967920 -45 32 10.009062924   12.000 11.293     ~ 5 0
6 UCAC2 13560782 * 12 05 11.4623025696 -42 51 11.910851352   13.59 12.42 12.20 11.17 ~ 4 0
7 UCAC4 280-068848 * 12 49 47.6836670832 -34 04 02.603802936   12.902 11.495 11.109 10.035 ~ 12 0
8 NAME NGP reg 12 51 26.275 +27 07 41.70           ~ 1274 0
9 UCAC2 8546068 * 12 53 45.7791376008 -53 34 39.691865388   14.558 12.782 12.16 10.77 ~ 5 0
10 UCAC4 231-064001 * 12 56 12.1547563608 -43 52 33.227522400   13.537 12.656 12.457   ~ 3 0
11 TYC 6699-909-1 * 13 14 12.6389135256 -23 59 37.752952236   12.520 11.006     ~ 5 0
12 TYC 6721-249-1 Pe* 13 24 18.0059196864 -28 03 56.435996700   13.106 12.135     CEMP 8 0
13 UCAC4 353-067498 * 13 26 14.0945766864 -19 35 52.294048476   13.665 12.64 12.515   ~ 4 0
14 V* BU Cen RV* 13 29 36.7407856656 -50 00 05.430320676   11.829 12.40     ~ 19 0
15 UCAC4 437-056515 * 13 34 47.0987168184 -02 43 40.968340644   13.753 12.633 12.493   ~ 3 0
16 UCAC2 703731 * 13 47 25.3812417720 -75 58 18.933569688   13.465 12.013 11.68 10.47 ~ 5 0
17 TYC 9430-2649-1 SB* 13 47 58.8157956840 -77 13 23.260927296   11.837 10.770     ~ 8 0
18 TYC 7790-1151-1 * 13 58 20.1276204048 -37 32 41.797812660   13.101 11.648     ~ 5 0
19 TYC 6734-207-1 * 14 07 15.0871381296 -26 12 27.071700840   11.896 10.424     ~ 5 0
20 2MASS J14074959-7417510 LP* 14 07 49.5688855416 -74 17 51.188617356   13.512 11.796 11.33 10.08 ~ 6 0
21 UCAC2 19663066 * 14 16 07.1372050296 -29 25 05.316045996   13.967 12.879 12.73 11.76 ~ 5 0
22 UCAC2 552791 * 14 24 52.5185101824 -77 20 01.849531884   13.175 12.223 12.05 11.14 ~ 9 0
23 UCAC2 829785 * 14 30 43.7138771496 -74 38 54.281743476   14.300 12.808 12.45 11.21 ~ 5 0
24 TYC 6745-811-1 SB* 14 36 31.9847825112 -24 18 08.065406772   13.247 11.978     ~ 6 0
25 TYC 7831-1330-1 * 14 42 51.4283045520 -44 12 30.382112988   12.389 10.884     ~ 5 0
26 UCAC4 340-071478 * 14 46 14.8506340344 -22 03 55.022563656   13.494 12.247 12.068   ~ 3 0
27 TYC 6759-595-1 * 14 49 03.1102179600 -29 58 58.794624912   12.970 11.813     ~ 5 0
28 UCAC2 27853648 * 14 54 27.7962844704 -11 20 21.775282440   13.352 12.348 12.13 11.19 ~ 5 0
29 TYC 6172-544-1 * 14 57 48.5992185240 -18 01 45.032310696   13.250 11.738     ~ 5 0
30 TYC 5012-398-1 * 15 04 41.1447159504 -06 42 10.976770296   12.104 10.849     ~ 5 0
31 TYC 9266-457-1 Pe* 15 11 15.7859161896 -72 51 54.402974568   12.424 11.344     ~ 7 0
32 2MASS J15133549-1244339 Pe* 15 13 35.4904222632 -12 44 34.077296220   13.573 12.742 12.59 11.688 CEMP 13 0
33 UCAC2 13376484 * 15 15 56.0047888776 -43 21 32.384147148   13.528 12.027 11.67 10.51 ~ 5 0
34 TYC 7830-2512-1 * 15 16 05.4812375376 -41 41 15.319973904   12.886 11.264     ~ 5 0
35 TYC 6170-1152-1 * 15 19 07.8849945264 -16 24 41.411339352   12.436 11.422     ~ 5 0
36 UCAC2 22248815 * 15 22 59.4319796040 -23 42 15.643746180   14.137 12.614 12.29 10.95 ~ 6 0
37 UCAC3 175-136403 * 15 24 31.6338307008 -02 41 28.240851732   13.36 11.81 11.49 10.23 ~ 5 0
38 TYC 5595-799-1 * 15 27 11.0349218976 -09 09 20.998014552   12.613 11.292     ~ 5 0
39 TYC 6184-1295-1 * 15 28 31.7481528264 -16 05 36.431193588   12.677 11.236     ~ 5 0
40 UCAC2 24129299 * 15 32 17.4814528512 -19 52 39.037023912   12.554 11.095 10.75 9.78 ~ 6 0
41 UCAC4 361-072678 Pe* 15 42 11.1634022040 -17 52 43.890301992   13.421 12.456 12.241 11.24 ~ 8 0
42 UCAC2 27310531 * 15 42 20.9259064776 -12 50 44.656551564   13.806 12.711 12.49 11.45 ~ 5 0
43 TYC 5601-475-1 * 15 43 54.0451899840 -09 33 53.172236196   12.339 11.272 10.88 10.04 ~ 7 0
44 UCAC2 25330193 Pe* 15 46 50.5509173976 -17 29 29.036980140   13.474 12.501 12.34 11.88 ~ 7 0
45 TYC 5022-617-1 * 15 46 57.9543135048 -02 14 32.036245980   13.19 12.13     ~ 3 0
46 RAVE J155139.7-223146 * 15 51 39.7117362144 -22 31 46.097460696   14.309 12.874 12.11 11.307 ~ 7 0
47 UCAC2 26011823 * 15 54 09.3369726936 -15 45 25.099073640   14.033 13.038 12.85 11.76 ~ 5 0
48 TYC 5619-109-1 Pe* 16 01 16.3871951160 -12 01 52.721743296   13.370 11.713     ~ 23 0
49 2MASS J16030907-0330295 LP* 16 03 09.0714031224 -03 30 29.647272600   13.355 11.672 11.364   M0.0III 8 0
50 TYC 9273-4485-1 Pe* 16 05 12.4947935016 -69 07 35.588789508   12.673 11.267     ~ 7 0
51 UCAC4 406-064872 * 16 08 43.7131568712 -08 55 37.517853792   13.545 11.912 11.553   ~ 5 0
52 DENIS J161043.9-692036 LP? 16 10 43.9899326616 -69 20 36.760880796   14.591 12.83 12.44 10.91 ~ 9 0
53 UCAC3 158-141158 * 16 13 20.4663656160 -11 00 25.110734940   14.924 13.221 12.75 11.32 ~ 5 0
54 UCAC2 30715758 * 16 27 30.0865116600 -03 05 44.045624724   13.945 13.026 12.78 11.84 ~ 5 0
55 UCAC4 113-115469 * 16 28 43.7151512208 -67 35 35.015119764   13.487 12.406 12.123   ~ 3 0
56 TYC 9522-2670-1 * 16 36 11.7684021768 -83 10 11.939088108   13.27 11.17     ~ 5 0
57 TYC 5052-725-1 Pe* 16 36 37.5817439448 -03 23 34.200762468   13.127 11.737     CEMP 6 0
58 UCAC2 30389153 * 16 45 51.1619782272 -04 29 47.310046404   13.666 12.203 11.86 10.43 ~ 9 0
59 UCAC2 31026046 Pe* 16 47 09.6001995096 -02 25 16.449661452   14.211 12.795 12.50 11.34 ~ 9 0
60 TYC 9279-500-1 * 16 48 10.9091820168 -70 54 47.103079176   12.64 11.43     ~ 3 0
61 UCAC3 182-141869 * 16 56 32.9715174192 +00 44 42.320190300   13.693 12.319 12.02 10.99 ~ 5 0
62 UCAC4 154-194382 * 17 00 14.5162520976 -59 17 29.214167748     11.430 11.120   ~ 3 0
63 UCAC4 137-158546 Pe* 17 00 57.6521489856 -62 42 23.109794352   13.344 12.356 12.145   ~ 6 0
64 TYC 9064-3019-1 * 17 23 00.9713152104 -66 05 28.385069748   12.870 11.498     ~ 5 0
65 UCAC2 6208215 * 17 32 05.6629264752 -58 32 27.309719400   13.22   12.15 11.16 ~ 4 0
66 UCAC2 6209393 * 17 37 43.2573191928 -58 45 50.815781208   13.662 12.593 12.39 11.40 ~ 5 0
67 TYC 9293-1156-1 * 17 40 33.0868767744 -69 52 24.080661840   12.227 11.108     ~ 5 0
68 TYC 9298-140-1 * 18 03 04.0919620440 -72 29 35.760691032   12.76 10.81     ~ 4 0
69 UCAC2 7171624 * 18 40 36.0319718640 -56 32 22.649067456   12.804 11.681 11.46 10.62 ~ 6 0
70 TYC 9069-1301-1 PM* 18 44 56.9946342384 -60 53 52.591882524   11.599 10.720     ~ 6 0
71 UCAC2 11657001 SB* 18 46 51.9998282496 -47 03 08.963319024   13.955 12.896 12.63 11.73 ~ 6 0
72 TYC 8377-479-1 * 18 55 58.4021383512 -47 32 35.319751728   13.44 11.55     ~ 4 0
73 UCAC2 3207677 Pe* 19 05 43.1031200208 -65 16 38.942035860   13.981 12.396 12.00 10.78 ~ 7 0
74 NAME Orphan Stream St* 19 09 -23.           ~ 281 0
75 UCAC2 15854893 * 19 10 06.7306263240 -37 45 56.258064036   13.575 11.805 11.41 9.52 ~ 5 0
76 UCAC2 13665358 * 19 11 38.2569976968 -42 30 01.062440388   13.018 11.674 11.38 10.39 ~ 5 0
77 UCAC4 083-058077 Pe* 19 16 03.5917463544 -73 29 37.740933636   13.168 12.164 12.03   CEMP 7 0
78 UCAC2 1069599 Pe* 19 17 22.0221660312 -73 24 02.693885724   13.714 12.753 12.59 11.74 ~ 6 0
79 UCAC2 2199357 * 19 21 52.1684683584 -68 05 01.966143228   14.425 13.198 12.91 11.85 ~ 5 0
80 UCAC2 10078079 * 19 23 23.7931502904 -50 43 05.834930484   13.789 12.822 12.67 11.71 ~ 5 0
81 UCAC2 2654630 * 19 31 12.8586844800 -66 36 37.770327792   14.085 12.887 12.59 11.73 ~ 5 0
82 TYC 8773-1327-1 * 19 31 21.6372279648 -58 46 27.158326644   12.660 11.192     ~ 5 0
83 TYC 8401-199-1 PM* 19 32 37.4598867624 -51 22 21.577525860   12.426 11.392 10.74 10.583 ~ 8 0
84 TYC 8786-651-1 * 19 33 38.2171015872 -59 59 03.015621060   12.340 11.429     ~ 13 0
85 UCAC4 367-169199 * 19 41 04.9955535408 -16 36 54.792688500     12.915 12.659   ~ 3 0
86 CD-80 723 * 19 44 49.0353036192 -79 57 24.888909132   11.873 10.128     K5 8 0
87 UCAC4 335-207864 * 19 45 01.5485608632 -23 06 59.455527156   13.833 12.617 12.312   ~ 5 0
88 UCAC2 19792532 Pe* 19 49 08.7927068400 -29 04 27.168941568   13.666 12.631 12.44 11.47 ~ 6 0
89 UCAC2 16940427 * 19 50 17.8201741920 -35 24 12.932353476   13.24 11.682 11.34 10.03 ~ 5 0
90 TYC 5725-1142-1 * 19 52 59.3198844576 -09 20 43.078646832   12.25 11.27     ~ 5 0
91 UCAC2 2348560 * 19 57 18.0291761064 -67 57 53.303805972   13.916 12.368 12.02 10.89 ~ 5 0
92 2MASS J19583823-5248496 LP* 19 58 38.2318654896 -52 48 49.665512304   13.324 11.586     ~ 7 0
93 TYC 7453-464-1 * 20 07 28.2049455480 -36 57 10.182651480   12.385 11.009     ~ 5 0
94 TYC 8400-122-1 Pe* 20 07 28.5606424176 -49 54 34.176341232   12.37 11.25     ~ 12 0
95 UCAC2 5727973 * 20 10 48.7249236960 -59 49 25.166840376   13.111 12.046 11.99 10.95 ~ 5 0
96 TYC 8417-1629-1 * 20 17 33.1630988472 -51 38 35.252063916   12.63 11.37 11.09 10.49 ~ 10 0
97 TYC 6914-800-1 Pe* 20 20 29.1778364280 -27 07 34.815333828   11.991 11.172     CEMP-r 11 0
98 TYC 8781-1743-1 Pe* 20 21 41.1007390080 -55 50 31.105338828   12.581 11.839     ~ 10 0
99 UCAC2 21211124 * 20 22 55.3824340176 -26 28 28.730803980   13.257 12.272 12.04 11.15 ~ 5 0
100 UCAC2 16290582 * 20 26 32.3705382408 -36 42 20.310348600   12.921 12.003 11.95 10.96 ~ 5 0
101 UCAC3 137-440324 * 20 27 16.4408131776 -21 49 56.055578268   13.428 12.183 14.43 11.10 ~ 5 0
102 UCAC2 22121953 * 20 27 16.8115481232 -24 14 58.369995456   13.826 12.679 12.47 11.43 ~ 5 0
103 TYC 8802-571-1 * 20 27 17.9333449440 -59 08 13.658476884   12.200 11.214     ~ 5 0
104 TYC 8410-989-1 * 20 31 01.4166841776 -46 56 00.388158396   12.468 11.153     ~ 5 0
105 CD-30 18053 * 20 37 41.7539913264 -30 15 46.285094556   12.205 10.596     ~ 5 0
106 UCAC4 211-187209 * 20 37 50.0330719056 -47 48 59.729400432   13.762 12.692 12.546   ~ 5 0
107 TYC 6921-1411-1 * 20 45 46.1221900992 -24 19 13.675129500   12.48 11.19 10.47 10.124 ~ 7 0
108 DENIS J204937.6-175436 Pe* 20 49 37.6801960584 -17 54 36.434387124   13.357 12.453 12.07 11.478 CEMP 10 0
109 UCAC4 235-184448 * 20 50 18.3501352248 -43 08 59.670029796   13.846   12.554 11.75 ~ 8 0
110 UCAC2 3411083 * 20 50 26.3335988160 -64 37 19.823227356   13.13 12.43 12.38 11.56 ~ 5 0
111 UCAC4 300-262570 * 21 04 01.3417286976 -30 00 49.134259404       11.718   ~ 3 0
112 UCAC2 13258375 * 21 04 17.8093939488 -43 30 11.565869544   13.339 12.325 12.10 11.13 ~ 5 0
113 TYC 9109-1155-1 PM* 21 08 22.8614247984 -63 53 48.647798340   11.151 10.072     ~ 7 0
114 UCAC2 11672366 * 21 09 49.1188258296 -47 18 13.660790040   13.252 12.122 11.97 10.97 ~ 5 0
115 UCAC2 17397186 * 21 12 42.5817683520 -34 00 44.854145172   13.31 12.450 12.20 11.24 ~ 6 0
116 UCAC2 8170049 * 21 12 49.6198392840 -54 54 57.029980104   13.628 12.631 12.42 11.53 ~ 7 0
117 TYC 8430-705-1 * 21 13 59.5292211312 -49 31 53.197465404   12.520 11.842     ~ 6 0
118 UCAC4 248-189527 Pe* 21 19 27.0746740272 -40 29 08.261800368   13.829 13.041 12.808 12.024 ~ 12 0
119 TYC 7974-46-1 * 21 19 29.3684318856 -41 49 13.344225528   13.078 12.047     ~ 5 0
120 TYC 6360-1006-1 Pe* 21 23 49.8029216712 -16 27 47.828031840   12.334 11.349     ~ 8 0
121 TYC 8423-308-1 * 21 29 58.4277944256 -45 04 03.409636368   13.19 12.02     ~ 8 0
122 UCAC4 274-200928 * 21 40 19.0056094872 -35 19 30.962095500   13.642 12.698 12.496   ~ 10 0
123 UCAC2 21900878 * 21 42 18.4961646312 -24 51 06.156097992   12.857 12.175 11.90 11.24 ~ 5 0
124 TYC 8808-987-1 * 21 49 50.8491965016 -52 32 38.929425000   12.530 11.882     ~ 6 0
125 UCAC2 19553203 * 21 54 56.5851412104 -29 38 18.149289288   13.625 12.166 11.82 10.47 ~ 5 0
126 TYC 8444-76-1 * 22 13 20.4894810480 -51 37 38.689403592   12.223 11.630     ~ 15 0
127 UCAC4 194-195092 * 22 17 02.9457097488 -51 22 02.871420780   13.328 12.564 12.442   ~ 11 0
128 TYC 6381-1275-1 * 22 21 26.5051361712 -18 01 12.789290856   11.89 10.87     ~ 3 0
129 TYC 9117-681-1 * 22 25 42.0169132248 -60 35 34.901740392   12.322 11.495     ~ 7 0
130 UCAC2 15189155 * 22 30 01.0069292016 -39 15 11.754612144   14.017 12.988 12.78 11.84 ~ 5 0
131 TYC 5817-305-1 PM* 22 36 17.8940562120 -13 51 08.005694904   12.92 12.38     ~ 9 0
132 UCAC2 9165570 Pe* 22 59 26.8560387432 -52 37 32.626830396   13.205 12.590 12.57 11.64 ~ 7 0
133 TYC 9338-874-1 Pe* 23 02 22.8947875320 -68 33 23.350630572   12.276 11.592     ~ 17 0
134 TYC 8830-861-1 Pe* 23 03 26.7602261496 -59 23 41.220512952   12.484 11.840 10.99 11.024 ~ 17 0
135 UCAC2 12354594 * 23 47 16.0937398560 -45 37 51.360960216   13.753 12.898 12.79 12.00 ~ 5 0
136 TYC 8833-1220-1 * 23 57 50.0295054480 -54 53 10.610812824   11.871 10.971     ~ 6 0
137 [LDL2019] GL-1 St* ~ ~           ~ 1 0
138 [LDL2019] GL-2 St* ~ ~           ~ 1 0
139 NAME Virgo Stellar Stream MGr ~ ~           ~ 110 0

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