2018ApJ...869..122L

Query : 2018ApJ...869..122L

2018ApJ...869..122L - Astrophys. J., 869, 122-122 (2018/December-3)

GD-1: the relic of an old metal-poor globular cluster.

LI G.-W., YANNY B. and WU Y.

Abstract (from CDS):

Combining data from Gaia DR2, SDSS DR14, and LAMOST DR6, we update the fit to model of the properties of the stellar stream GD-1 and find that it has an age of ∼13 Gyr, [Fe/H] of -2.2 ± 0.12, and a distance from the Sun of ∼8 kpc. We tabulate six-dimensional (6D) phase-space fiducial points along the GD-1 stream orbit over a 90° arc. The fitted orbit shows that the stream has an eccentricity e ∼ 0.3, perigalacticon of 14.2 kpc, apogalacticon of 27.0 kpc, and inclination i ∼ 40°. There is evidence along the arc for four candidate stellar overdensities, one candidate gap, two candidate stellar underdensities, and that the stream is cut off at ph1 ∼ 2° (in the stream-aligned (ph1, ph2) coordinate system of Koposov et al.). The spur originating at ph1 ∼ -40° implies stars were pulled away from the stream trace by an encounter (potentially a dark matter subhalo). The narrowest place (FWHM ∼ 44.6 pc) of the GD-1 trace is at (ph1, ph2c) ∼ (-14°, 0.°15), which is ∼(178.°18, 52.°19) in (R.A., decl.), where the progenitor is possibly located. We also find six blue horizontal branch and 10 blue stragglers spectroscopic stars in the GD-1 stream.

Abstract Copyright: © 2018. The American Astronomical Society. All rights reserved.

Journal keyword(s): Galaxy: abundances - Galaxy: kinematics and dynamics - Galaxy: structure - globular clusters: general

VizieR on-line data: <Available at CDS (J/ApJ/869/122): table3.dat table4.dat table6.dat table7.dat table8.dat>

Simbad objects: 160

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Number of rows : 160
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 SDSS J082618.51-002621.7 * 08 26 18.5166932712 -00 26 21.842019780           A0 3 0
2 2MASS J08263491-0020252 * 08 26 34.8997131024 -00 20 25.713760020           A0 5 0
3 SDSS J082900.48+010510.5 * 08 29 00.4840100005 +01 05 10.500796648           A0 1 0
4 SDSS J082906.94-000355.3 * 08 29 06.9422672710 -00 03 55.328434338           A0 2 0
5 SDSS J083434.85+035048.3 BS* 08 34 34.8549396432 +03 50 48.370615944           sdA 3 0
6 UCAC4 472-040109 BS* 08 40 13.1158530626 +04 22 49.290570055   13.450 12.463 12.329   ~ 1 0
7 SDSS J084102.07+074653.5 * 08 41 02.0789831691 +07 46 53.606039740           A2II 2 0
8 SDSS J084131.89+062521.2 * 08 41 31.8967595909 +06 25 21.306627854           F5 1 0
9 SDSS J084537.67+094613.4 * 08 45 37.6764306768 +09 46 13.561995828           A0 4 0
10 SDSS J084800.00+094841.8 * 08 48 00.0058032327 +09 48 41.980201058           A0 1 0
11 SDSS J084813.32+103441.0 * 08 48 13.3298772162 +10 34 41.055628902           F3/F5V 1 0
12 SDSS J084837.88+110809.0 * 08 48 37.8832691136 +11 08 09.080364876           F5 3 0
13 Cl* NGC 2682 FBC 820 * 08 49 28.2404849736 +11 19 31.860481476           F5 6 0
14 Cl* NGC 2682 FBC 2393 * 08 50 43.6565204944 +11 26 46.810910364           A0 3 0
15 SDSS J085136.22+104222.4 * 08 51 36.2262338632 +10 42 22.496393050           F5 1 0
16 Cl* NGC 2682 SAND 1650 RG* 08 52 17.6162039760 +12 16 00.906544884     15.937     F5 9 0
17 SDSS J085324.36+130837.4 * 08 53 24.3659048109 +13 08 37.505924332           A0V 2 0
18 SDSS J085838.13+145715.1 * 08 58 38.1404083748 +14 57 15.243786471           F2V 2 0
19 SDSS J090741.70+180047.5 * 09 07 41.7060005880 +18 00 47.679131742           A5III 4 0
20 SDSS J091159.04+205234.1 * 09 11 59.0461847772 +20 52 34.274093533           F8V 3 0
21 SDSS J091333.53+222042.8 * 09 13 33.5306012078 +22 20 42.899924317           A0 2 0
22 SDSS J091335.97+222446.8 * 09 13 35.9709604800 +22 24 46.936477908           B6 6 0
23 2MASS J09134819+2226046 * 09 13 48.1847516856 +22 26 04.501682880           F3/F5V 5 0
24 SDSS J091443.18+220057.9 * 09 14 43.1832301475 +22 00 58.099760052           A0 4 0
25 SDSS J091637.25+230719.1 * 09 16 37.2637206615 +23 07 19.149666877           A0 3 0
26 SDSS J091803.32+223918.8 * 09 18 03.3323693803 +22 39 18.831324735           A0 4 0
27 UCAC2 40854773 HB* 09 20 56.7820662982 +25 32 01.854662320   15.203 15.107 15.170   ~ 1 0
28 2MASS J09214741+2619366 Pe* 09 21 47.3412754955 +26 19 36.606298051           F2III 3 0
29 SDSS J092616.44+265804.2 * 09 26 16.4411315798 +26 58 04.236475505           A2II 2 0
30 SDSS J092638.72+265029.9 * 09 26 38.7298374751 +26 50 30.046306635           ~ 2 0
31 ZTF J092707.02+280934.7 dS* 09 27 07.0259028398 +28 09 34.923330623           A4V 4 0
32 SDSS J092735.73+274110.1 * 09 27 35.7278861928 +27 41 10.191657300           A0 5 0
33 SDSS J092758.00+270029.8 * 09 27 58.0015965909 +27 00 29.911926526           F2III 3 0
34 SDSS J093057.49+291657.6 * 09 30 57.4939122236 +29 16 57.753137830           A0 4 0
35 2MASS J09310909+2927403 * 09 31 09.0794635968 +29 27 40.000155048           F5 6 0
36 SDSS J093110.51+285701.9 * 09 31 10.5095256341 +28 57 02.049657221           A2II 3 0
37 SDSS J093117.20+293701.3 * 09 31 17.2046469888 +29 37 01.330183416           A0 4 0
38 SDSS J093154.91+290810.6 * 09 31 54.9092828856 +29 08 10.756032108           A0 5 0
39 SDSS J093254.18+290532.8 * 09 32 54.1799984280 +29 05 32.886382654           F5 2 0
40 SDSS J093313.10+293919.2 * 09 33 13.1059158408 +29 39 19.179686988           A0 3 0
41 2MASS J09332151+2937132 * 09 33 21.4872011328 +29 37 13.420758504           A0 5 0
42 2MASS J09334182+2902117 * 09 33 41.7800002344 +29 02 11.221867932           F2V 5 0
43 2MASS J09334876+2907140 HB* 09 33 48.7655061408 +29 07 14.296762776     15.15     sdA 9 0
44 SDSS J093405.29+294233.3 * 09 34 05.3026812835 +29 42 33.461199936           A0 3 0
45 2MASS J09341274+2928394 * 09 34 12.7079552904 +29 28 39.118199196           F3/F5V 5 0
46 Ton 436 HB* 09 34 23.4820060776 +29 48 09.782929656   14.5       sdA 9 0
47 SDSS J093452.54+295226.7 * 09 34 52.5537017376 +29 52 26.837952708           A0 5 0
48 SDSS J093558.46+294851.3 * 09 35 58.4698957068 +29 48 51.401692098           A0 3 0
49 SDSS J093625.76+304416.5 * 09 36 25.7647726368 +30 44 16.535103360           A0 5 0
50 SDSS J093629.02+305651.7 * 09 36 29.0292045240 +30 56 51.837174384           A0 5 0
51 SDSS J093756.93+302437.4 * 09 37 56.9412855312 +30 24 37.444788864           A0 6 0
52 SDSS J093814.81+305806.1 * 09 38 14.8150351824 +30 58 06.130088004           F5 5 0
53 SDSS J093836.09+312031.5 * 09 38 36.0935592936 +31 20 31.517147220           A0 4 0
54 SDSS J093849.79+304456.4 * 09 38 49.7983801128 +30 44 56.442250003           A0 3 0
55 UCAC4 601-047177 * 09 39 13.5448762134 +30 07 28.347532530       15.881   ~ 3 0
56 SDSS J094219.87+314638.8 Pe* 09 42 19.8799353834 +31 46 38.935597979           ~ 2 0
57 SDSS J094242.37+322148.1 Pe* 09 42 42.3694360872 +32 21 48.222585540           ~ 6 0
58 SDSS J094426.11+324830.8 Pe* 09 44 26.1089283144 +32 48 30.888992700           ~ 5 0
59 UCAC4 617-046032 HB* 09 47 35.4565336952 +33 15 29.618625885   15.351 15.373 15.714   ~ 3 0
60 SDSS J094805.33+342227.9 BS* 09 48 05.3336762650 +34 22 27.928177180     17     ~ 2 0
61 SDSS J095412.52+353103.9 * 09 54 12.5228446601 +35 31 03.972340877           F0IV 2 0
62 SDSS J095513.01+355319.1 * 09 55 13.0157672221 +35 53 19.100787802           ~ 3 0
63 SDSS J095712.89+363942.7 * 09 57 12.8928853282 +36 39 42.748058589           A5III 3 0
64 SDSS J100205.96+373227.6 BS* 10 02 05.9663640706 +37 32 27.706033560           ~ 1 0
65 2MASS J10045983+3759567 * 10 04 59.8344664560 +37 59 56.559597540           F5 5 0
66 SDSS J101009.34+385054.8 * 10 10 09.3549589290 +38 50 54.897168809           F0V 3 0
67 2MASS J10101995+3945161 * 10 10 19.9556367912 +39 45 16.307895240           F5 5 0
68 SDSS J101315.35+403925.1 * 10 13 15.3621832564 +40 39 25.188817804           F0IV 2 0
69 SDSS J101508.99+421349.4 Pe* 10 15 08.9960361651 +42 13 49.465011423           ~ 5 0
70 SDSS J101933.76+413023.9 * 10 19 33.7746342312 +41 30 23.982685164           A0 4 0
71 SDSS J101951.76+412701.5 * 10 19 51.7716922728 +41 27 01.627965000           A0 6 0
72 PB 177 * 10 22 04.8547163208 +42 01 38.803134036           F5 6 0
73 SDSS J102340.41+422138.9 BS* 10 23 40.4237832402 +42 21 38.895092900   18.5       sdA 4 0
74 SDSS J102435.01+422928.5 * 10 24 35.0158559856 +42 29 28.558433796           A0 4 0
75 SDSS J102506.67+423123.9 * 10 25 06.6739005768 +42 31 23.939968260           ~ 5 0
76 SDSS J102552.85+432408.1 * 10 25 52.8600900600 +43 24 08.207370756           A0 4 0
77 SDSS J102608.04+432814.1 * 10 26 08.0469439864 +43 28 14.195192442           A0 1 0
78 SDSS J102712.23+433439.0 * 10 27 12.2351712773 +43 34 39.147051648           F0IV 2 0
79 SDSS J102757.56+443830.7 * 10 27 57.5693248873 +44 38 30.785321472           F5 2 0
80 SDSS J102843.56+443051.6 * 10 28 43.5709610640 +44 30 51.716166336           A0 6 0
81 SDSS J103011.87+433423.0 * 10 30 11.8753619664 +43 34 23.049236964           A0 5 0
82 SDSS J103015.79+433835.9 * 10 30 15.7949951904 +43 38 35.996483220           A0 7 0
83 SDSS J103037.44+434751.3 * 10 30 37.4500044984 +43 47 51.425112012           A0 5 0
84 SDSS J103038.42+435406.1 * 10 30 38.4269195274 +43 54 06.115577754           F1V 4 0
85 SDSS J103046.02+434751.8 * 10 30 46.0267867368 +43 47 51.951543144           A0 5 0
86 SDSS J103159.14+434644.0 * 10 31 59.1599485829 +43 46 44.041380597           A0 2 0
87 SDSS J103212.31+433838.5 * 10 32 12.3149083680 +43 38 38.543771436           A0 6 0
88 SDSS J103225.95+441526.5 * 10 32 25.9550427719 +44 15 26.549455967           F5 2 0
89 SDSS J103310.70+440245.5 * 10 33 10.7100500376 +44 02 45.557252520           A0 4 0
90 SDSS J103344.89+442759.0 * 10 33 44.8989238992 +44 27 59.029264116           A0 5 0
91 SDSS J103351.80+442702.8 * 10 33 51.8112209976 +44 27 02.896992936           A0 3 0
92 SDSS J103429.38+442538.1 * 10 34 29.3825196912 +44 25 38.247376620           A0 5 0
93 SDSS J103448.15+443149.3 * 10 34 48.1515819720 +44 31 49.475478648           A0 6 0
94 2MASS J10345934+4441124 * 10 34 59.3404086600 +44 41 12.410554848           F5 7 0
95 SDSS J103505.90+460136.7 BS* 10 35 05.9033878968 +46 01 36.731916076           ~ 1 0
96 SDSS J103519.03+443338.1 * 10 35 19.0309693984 +44 33 38.100674610           A0 2 0
97 SDSS J103537.68+445908.0 * 10 35 37.6821049514 +44 59 08.101946794           A0 2 0
98 SDSS J103547.65+442657.5 * 10 35 47.6551428063 +44 26 57.540127317           A0 3 0
99 SDSS J103703.34+444547.5 * 10 37 03.3452142432 +44 45 47.620933956           A0 5 0
100 SDSS J103714.56+445138.1 * 10 37 14.5649952252 +44 51 38.149147868           A0 4 0
101 SDSS J103804.37+454058.5 * 10 38 04.3782748183 +45 40 58.573224736           F0IV 1 0
102 2MASS J10392011+4543424 BS* 10 39 20.1258532447 +45 43 42.622400276           ~ 1 0
103 SDSS J103925.54+451239.3 * 10 39 25.5510928474 +45 12 39.263986772           A0 4 0
104 SDSS J103940.12+451655.9 * 10 39 40.1333581722 +45 16 55.940044312           F3/F5V 3 0
105 ATO J160.2066+45.5026 dS* 10 40 49.6040571841 +45 30 09.793851059           sdA 6 0
106 SDSS J104058.22+453042.9 * 10 40 58.2310783172 +45 30 43.008112651           ~ 3 0
107 SDSS J104259.97+455959.2 * 10 42 59.9770410497 +45 59 59.214533746           A2II 2 0
108 SDSS J104320.03+451952.8 * 10 43 20.0446569339 +45 19 52.878160190           A0 1 0
109 SDSS J104456.23+462404.0 * 10 44 56.2400159232 +46 24 04.082140309           F0III 3 0
110 UCAC4 686-052817 * 10 48 12.6828831984 +47 08 43.526771628   15.506   14.651   F5 8 0
111 SDSS J104929.16+471227.4 * 10 49 29.1641557680 +47 12 27.516784320           A0 7 0
112 SDSS J105011.33+465927.3 * 10 50 11.3408798520 +46 59 27.382652880           F0IV 5 0
113 ATO J162.5577+47.2510 dS* 10 50 13.8628122912 +47 15 03.974355468           sdA 7 0
114 SDSS J105110.83+470621.8 * 10 51 10.8449858376 +47 06 21.825197532           A0 4 0
115 SDSS J105126.60+472858.7 BS* 10 51 26.6118387758 +47 28 58.724109585           A0 1 0
116 SDSS J105238.19+482910.8 * 10 52 38.1946122480 +48 29 10.837013712           A0 4 0
117 SDSS J105249.89+474002.3 * 10 52 49.8907437333 +47 40 02.259802520           F5 2 0
118 SDSS J105256.72+472347.9 * 10 52 56.7267576912 +47 23 47.957465868           A0 3 0
119 SDSS J105309.02+484649.8 * 10 53 09.0277636486 +48 46 49.888693052           A0 3 0
120 SDSS J105435.68+483051.8 * 10 54 35.6814604080 +48 30 51.821650080           A0 3 0
121 SDSS J105450.89+482001.7 * 10 54 50.9040048480 +48 20 01.745014308           A0 5 0
122 SDSS J105511.81+474848.9 * 10 55 11.8122414120 +47 48 48.891172284           A0 5 0
123 SDSS J105516.29+475049.0 * 10 55 16.2931078992 +47 50 49.048774476           A0 5 0
124 SDSS J105655.15+480152.1 * 10 56 55.1503727095 +48 01 52.228446395           A0 1 0
125 SDSS J105715.32+481135.1 * 10 57 15.3155906718 +48 11 35.176494174           A0 3 0
126 SDSS J105729.12+481328.1 * 10 57 29.1242524800 +48 13 28.165745244           A0 6 0
127 SDSS J110005.77+485202.1 * 11 00 05.7619261425 +48 52 02.228415306           A0 2 0
128 2MASS J11004783+4840091 * 11 00 47.8733853240 +48 40 09.381740268           F5 6 0
129 UCAC4 696-051968 Pe* 11 04 04.5598032218 +49 09 12.068163933   16.955 16.169 15.873   ~ 6 0
130 SDSS J111029.34+501748.1 * 11 10 29.3443297134 +50 17 48.247672044           F0V 3 0
131 SDSS J112751.61+521622.1 BS* 11 27 51.6226198951 +52 16 22.208563839           ~ 1 0
132 SDSS J112905.91+521518.9 * 11 29 05.9260196352 +52 15 18.940658653           F0III 3 0
133 SDSS J113018.58+524033.5 * 11 30 18.5868545592 +52 40 33.495605514           A2II 2 0
134 SDSS J114213.64+531039.4 * 11 42 13.6499858246 +53 10 39.378477875           ~ 2 0
135 2MASS J11544376+5410259 HB* 11 54 43.7771954880 +54 10 25.789024992           B9.0 3 0
136 2MASS J11585826+5453162 * 11 58 58.2473762256 +54 53 16.451275812           F5 4 0
137 SDSS J115945.01+545222.0 BS* 11 59 45.0162334525 +54 52 21.988634441           A0 2 0
138 SDSS J120307.11+540103.8 BS* 12 03 07.1146313687 +54 01 03.932885924           A0 1 0
139 SDSS J120552.49+550513.2 * 12 05 52.4965453835 +55 05 13.158922317           A2II 1 0
140 UCAC4 728-050405 * 12 07 42.0310134077 +55 33 34.301211515   16.606 16.034 15.753   ~ 4 0
141 SDSS J120913.93+552302.6 * 12 09 13.9486861607 +55 23 02.594817529           A2II 2 0
142 SDSS J121529.64+561215.4 * 12 15 29.6468962440 +56 12 15.520654152           sdA 3 0
143 2MASS J12170087+5609591 * 12 17 00.9211610760 +56 09 59.385668760           F3V 5 0
144 SDSS J122550.46+563739.3 BS* 12 25 50.4738442680 +56 37 39.327057660           A0 3 0
145 SDSS J122737.63+565330.0 * 12 27 37.6377079853 +56 53 30.076084108           A2II 2 0
146 UCAC4 731-050870 HB* 12 29 32.3894342165 +56 03 46.152469331   15.617 15.606 15.771   ~ 2 0
147 SDSS J130505.41+580758.2 * 13 05 05.4178389240 +58 07 58.206503568           F5 5 0
148 SDSS J130552.33+570440.3 * 13 05 52.3447352157 +57 04 40.344571886           ~ 1 0
149 SDSS J130809.44+575531.9 BS* 13 08 09.4480959471 +57 55 31.984157163           ~ 1 0
150 SDSS J131121.77+575027.4 BS* 13 11 21.7720459279 +57 50 27.479765938           ~ 1 0
151 SDSS J131707.95+582030.0 BS* 13 17 07.9567304448 +58 20 30.038045496           ~ 3 0
152 2MASS J13221058+5805315 HB* 13 22 10.5868651176 +58 05 31.514111304           A1.2 3 0
153 SDSS J132210.65+580042.2 * 13 22 10.6581587722 +58 00 42.213513291           ~ 1 0
154 SDSS J134016.90+582736.2 BS* 13 40 16.9049533530 +58 27 36.287575435           ~ 1 0
155 2MASS J13425220+5929318 BS* 13 42 52.1849708432 +59 29 32.395661737           ~ 3 0
156 SDSS J134332.97+591110.4 BS* 13 43 32.9734710276 +59 11 10.432667794           ~ 2 0
157 SDSS J134349.90+583023.0 * 13 43 49.9099005542 +58 30 22.984306698           A2II 2 0
158 SDSS J135810.20+582624.0 HV* 13 58 10.1996223275 +58 26 24.129101264           ~ 3 0
159 NAME Galactic Center reg 17 45 39.60213 -29 00 22.0000           ~ 16269 0
160 NAME GD-1 Stream St* 22 40 +31.           ~ 319 0

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