2013ApJ...778...56C

Query : 2013ApJ...778...56C

2013ApJ...778...56C - Astrophys. J., 778, 56 (2013/November-3)

Normal and outlying populations of the Milky Way stellar halo at [Fe/H] ←2.

COHEN J.G., CHRISTLIEB N., THOMPSON I., McWILLIAM A., SHECTMAN S., REIMERS D., WISOTZKI L. and KIRBY E.

Abstract (from CDS):

From detailed abundance analysis of >100 Hamburg/ESO candidate extremely metal-poor (EMP) stars we find 45 with [Fe/H] < -3.0 dex. We identify a heretofore unidentified group: Ca-deficient stars with sub-solar [Ca/Fe] ratios and the lowest neutron-capture abundances; the Ca-deficient group comprises ∼10% of the sample, excluding Carbon stars. Our radial velocity distribution shows that the carbon-enhanced stars with no s-process enhancements, CEMP-no, and which do not show C2 bands are not preferentially binary systems. Ignoring Carbon stars, approximately 15% of our sample are strong ( ≥ 5σ) outliers in one or more elements between Mg and Ni; this rises to ∼19% if very strong ( ≥ 10σ) outliers for Sr and Ba are included. Examples include: HE0305-0554 with the lowest [Ba/H] known; HE1012-1540 and HE2323-0256, two (non-velocity variable) C-rich stars with very strong [Mg,Al/Fe] enhancements; and HE1226-1149, an extremely r-process rich star.

Abstract Copyright: ∼

Journal keyword(s): Galaxy: abundances - Galaxy: formation - Galaxy: halo

VizieR on-line data: <Available at CDS (J/ApJ/778/56): table1.dat table2a.dat table2b.dat table3.dat table6.dat table7.dat table8.dat table10.dat>

Simbad objects: 135

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Number of rows : 135
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 HE 2357-0701 Pe* 00 00 04.5075518160 -06 45 07.200213768     15.39 15.448   ~ 5 0
2 HE 0007-1832 Pe* 00 09 52.7815684392 -18 16 12.275163984   15.859 15.482 15.584   CEMP-no 21 0
3 HE 0009-6039 Pe* 00 11 30.8738340096 -60 22 21.344593872     16.54 16.034   ~ 4 0
4 HE 0011-0035 Pe* 00 14 15.7662742926 -00 18 58.989387713   15.849 14.989 14.798   ~ 8 0
5 HE 0012-1441 Pe* 00 15 27.0563508456 -14 24 37.626125112   17.045 16.423     CEMP-s 15 0
6 HE 0014-3607 PM* 00 16 53.4229673024 -35 51 03.674335439   16.646 15.849     ~ 1 0
7 HE 0017-4346 Pe* 00 20 16.2080006520 -43 30 18.055456992   16.388 15.860 15.638   CEMP-s 7 0
8 HE 0024-2523 Pe* 00 27 27.6486469632 -25 06 28.289948508 15.067 15.353 14.908 14.884   CEMP-s 69 0
9 HE 0025-2334 * 00 28 29.2346948952 -23 17 56.316946020 15.144 15.343 14.928 15.019   ~ 2 0
10 HE 0028-2152 * 00 31 07.6578380304 -21 36 07.259374188   16.191 15.813 15.794   ~ 4 0
11 HE 0037-0348 Pe* 00 40 03.2892095376 -03 32 02.704493112     16.10 15.909   ~ 4 0
12 HE 0039-4154 Pe* 00 41 43.4057863080 -41 37 57.347566500   14.654 13.832 13.318 12.786 ~ 15 0
13 HE 0048-0611 Pe* 00 51 15.1161054332 -05 55 28.554084143   16.268 15.517 15.504   ~ 5 0
14 HE 0054-2123 * 00 56 53.2383328296 -21 07 29.457473700   15.903 15.448 15.640   ~ 4 0
15 HE 0055-2314 Pe* 00 57 44.1022537296 -22 58 08.724582732   16.554 16.215 16.235   CEMP-no 5 0
16 HE 0058-0244 Pe* 01 00 53.0234702616 -02 28 19.950391884   14.42 13.73 13.331 12.942 CEMP-r/s 40 0
17 HE 0102-0633 Pe* 01 05 25.7046092952 -06 17 35.320285104   16.338 15.571 15.450   ~ 9 0
18 HE 0103-0357 Pe* 01 05 36.3354182328 -03 41 43.764434772   16.571 15.99 15.813   CEMP-no 6 0
19 HE 0105-2202 * 01 07 31.2348588528 -21 46 06.492533124   16.170 15.688 15.475   ~ 6 0
20 HE 0107-5240 Pe* 01 09 29.1555567432 -52 24 34.202039148   15.89 15.07 15.10 14.283 CEMP-no 250 0
21 HE 0122-1616 Pe* 01 25 10.8444672757 -16 00 54.744313697   16.487 15.743 15.630   ~ 5 0
22 HE 0130-1749 Pe* 01 32 26.3749806552 -17 34 22.557244224   15.598 14.871 14.882   CEMP-no 8 0
23 HE 0130-2303 Pe* 01 33 18.2202884064 -22 48 36.713991600 14.933 15.175 14.743 14.798 14.207 ~ 11 0
24 HE 0132-2439 Pe* 01 34 58.8596333280 -24 24 18.618548508 15.324 15.441 14.82 14.396 13.954 CEMP-no 23 0
25 HE 0134-2504 Pe* 01 36 37.3586015950 -24 49 04.215882324   15.474 14.562 14.538   CEMP-s 4 0
26 PHL 7731 * 01 44 47.8891367328 +02 02 17.747306844   15.96 15.53 15.59   ~ 5 0
27 HE 0143-0441 Pe* 01 45 37.9166141208 -04 26 43.244756916   16.884 16.377     CEMP-s 30 0
28 HE 0148-2611 Pe* 01 50 59.6229706560 -25 57 03.082337424 14.574 14.824 14.460 14.520   ~ 14 0
29 HE 0212-0557 Pe* 02 15 02.5102061448 -05 43 23.655462024   15.791 14.686 14.645   CEMP-s 16 0
30 HE 0218-2738 Pe* 02 21 03.9311324592 -27 24 40.401469764 15.037 15.277 14.870 15.021   ~ 17 0
31 HE 0221-2127 Pe* 02 23 25.2178302686 -21 13 35.272847501   16.344 15.906 15.719   ~ 2 0
32 HE 0226+0103 Pe* 02 29 13.7069193368 +01 17 15.605674419   16.094 15.242 15.450   ~ 3 0
33 HE 0242-0732 Pe* 02 45 00.6905166888 -07 19 42.358303632 15.956 16.227 15.840 15.701   ~ 11 0
34 HE 0251-3216 Pe* 02 53 05.4678560904 -32 04 21.277331220   15.931 15.409 15.369   CEMP-s 6 0
35 HE 0255-0859 Pe* 02 57 30.6291026799 -08 47 05.863272424   17.089 16.415     ~ 2 0
36 HE 0257-1837 * 02 59 28.2720704519 -18 26 02.602919566   16.146 15.641 15.691   ~ 1 0
37 LP 831-70 PM* 03 06 05.4386096664 -22 19 17.828964660   12.043 11.608 11.598   ~ 52 0
38 HE 0305-5442 Pe* 03 06 29.5014981984 -54 30 32.498486568   14.44 13.70 13.212 12.715 KIIvw 79 0
39 HE 0312-5200 Pe* 03 13 56.5301656296 -51 49 02.189359488   16.158 15.431 15.506   ~ 5 0
40 HE 0313-3640 * 03 15 01.7109755127 -36 29 55.046781978   14.739 14.343 14.389   ~ 2 0
41 HE 0317-0554 Pe* 03 19 49.5853648801 -05 43 40.265435527     16.00 15.955   ~ 2 0
42 HE 0332-1007 Pe* 03 35 16.7029896950 -09 57 33.666498355   15.534 14.587 14.487   ~ 6 0
43 HE 0336+0113 Pe* 03 38 52.9026695424 +01 23 07.778279004   15.807 14.941 14.980   CEMP-s 21 0
44 HE 0344-0243 Pe* 03 46 50.0746257936 -02 34 13.338977520   15.986 15.239 15.189   ~ 6 0
45 HE 0349-0045 Pe* 03 51 46.3118300968 -00 36 52.848317522   15.061 14.178 14.053   ~ 2 0
46 HE 0401-3835 Pe* 04 03 14.8988389176 -38 27 39.683009052   16.920 16.525     CEMP-no 6 0
47 HE 0406-2341 Pe* 04 08 26.1863665629 -23 33 21.593534574   16.184 15.689 15.659   ~ 2 0
48 HE 0411-5725 Pe* 04 12 05.1903072408 -57 17 59.420310720   16.524 15.753 15.774   ~ 6 0
49 HE 0445-2339 Pe* 04 47 07.0000520830 -23 34 13.772059911   14.727 14.057 13.728   ~ 5 0
50 HE 0447-1858 Pe* 04 49 41.4770316923 -18 53 19.101249373   14.393 13.778 13.753   ~ 4 0
51 HE 0458-1346 * 05 01 11.7974760640 -13 42 39.235733566   15.943 15.318 15.331   ~ 2 0
52 BD+03 740 HB* 05 01 16.6226363256 +04 06 37.021736844 9.97 10.17 9.7 9.6   sdF0 182 0
53 HE 0508-1555 * 05 10 35.4729523440 -15 51 38.255264316   15.821 15.349 15.307   ~ 6 0
54 HE 0533-5340 Pe* 05 34 54.1290105266 -53 38 23.979955147   15.937 15.151 14.977   ~ 8 0
55 HE 0557-4840 Pe* 05 58 39.2660594064 -48 39 56.890252404   16.144 15.466 15.336   CEMP-no 92 0
56 NGC 2419 GlC 07 38 08.51 +38 52 54.9     10.05     ~ 998 0
57 HE 0926-0546 Pe* 09 29 27.9598753848 -05 59 43.433385756   14.983 14.265 14.169   ~ 11 0
58 HE 1012-1540 Pe* 10 14 53.4753516864 -15 55 53.172437448   14.721 14.043 14.034   CEMP-no 43 0
59 UCAC3 215-112497 Pe* 10 29 15.1489854864 +17 29 27.924626724   17.424 16.708   15.98 sdA 120 0
60 HE 1031-0020 Pe* 10 34 24.2082300456 -00 36 08.378366148   15.337 14.321 14.263   CEMP-s 24 0
61 HE 1045+0226 Pe* 10 48 03.4066059720 +02 10 47.831885688   15.197 14.183 14.063   CEMP-s 10 0
62 BPS BS 16945-0054 Pe* 10 50 57.8393630088 +34 01 30.587682000   14.416 13.948 13.954   ~ 6 0
63 HE 1111-3026 Pe* 11 13 44.9578413722 -30 42 48.978886981   15.531 14.545 14.382   CEMP-s 4 0
64 BPS BS 16545-0089 Pe* 11 24 27.5182636872 +36 50 28.816337760   14.76 14.44 14.039 13.812 ~ 24 0
65 HE 1133-1641 Pe* 11 36 01.9848659219 -16 57 56.310725325   16.638 16.142 15.997   ~ 3 0
66 HE 1141-0610 Pe* 11 44 22.5608374128 -06 26 58.775399988   14.062 13.759 13.850   ~ 4 0
67 HE 1150-0428 Pe* 11 53 06.6090188016 -04 45 03.485197944   15.771 15.007 14.905   CEMP-no 31 0
68 HE 1159-0525 Pe* 12 02 26.8831764144 -05 41 54.366701136   16.079 15.105 15.072   CEMP-s 4 0
69 BPS BS 16920-0017 Pe* 12 07 16.8335931408 +41 39 32.430850740   14.69 13.93 13.368 12.877 ~ 20 0
70 HE 1226-1149 Pe* 12 29 28.0353121008 -12 06 14.150700612   15.415 14.798 14.470   ~ 7 0
71 Cl Ruprecht 106 GlC 12 38 40.20 -51 09 01.0           ~ 413 0
72 HE 1245-0215 Pe* 12 48 22.5203926904 -02 31 57.611055965     16.47     CEMP-s 7 0
73 HE 1258-1317 Pe* 13 00 44.0890577613 -13 33 25.422412734   15.703 14.956 14.955   ~ 3 0
74 HE 1300+0157 Pe* 13 02 56.2443901392 +01 41 52.080457056   14.536 14.11 13.678 13.261 CEMP-no 48 0
75 HE 1320+0038 * 13 22 35.3538435312 +00 22 32.680232796   14.081 13.824 13.901   ~ 5 0
76 HE 1320+0139 Pe* 13 22 50.6004129672 +01 23 42.949936212   16.72 16.08 15.40   F5 12 0
77 HE 1338-0052 Pe* 13 40 59.2397514792 -01 07 19.968191508   15.787 15.235     CEMP-no 7 0
78 BPS BS 16467-0062 Pe* 13 42 00.6326009568 +17 48 40.826539260   14.69 14.09 13.665 13.216 ~ 53 0
79 HE 1346-0427 Pe* 13 49 25.0682496912 -04 42 14.725345572   14.356 14.20 13.807 13.433 ~ 22 0
80 HE 1347-1025 Pe* 13 50 22.3970330568 -10 40 18.942310344   15.727 15.013     ~ 15 0
81 HE 1351-1721 * 13 53 49.6278459813 -17 36 38.560366910   16.382 15.375 15.303   ~ 1 0
82 HE 1356-0622 Pe* 13 59 30.3168806616 -06 36 34.904583792   14.995 14.268 14.313   ~ 16 0
83 HE 1357-0123 Pe* 14 00 01.1825350488 -01 38 07.516960584   15.525 14.619 14.552   ~ 8 0
84 HE 1405-2512 Pe* 14 08 21.7027182416 -25 26 30.199390659   16.483 15.817 15.946   CEMP-no 4 0
85 BPS BS 16550-0087 Pe* 14 10 26.7272915496 +18 01 23.732433480   14.59 13.76 13.211 12.688 ~ 28 0
86 HE 1410-0004 Pe* 14 13 04.6424800512 -00 18 32.564723904   16.071 15.419 15.628   CEMP-s 16 0
87 HE 1410+0213 Pe* 14 13 06.5623389120 +01 59 21.911258400   14.29 13.25 12.734 12.297 CEMP-no 25 0
88 HE 1416-1032 Pe* 14 19 37.4725374048 -10 46 10.232878368   15.777 14.984 14.729   ~ 8 0
89 HE 1422-0818 Pe* 14 25 06.5325460416 -08 31 30.861293808     15.239     ~ 5 0
90 HE 1424-0241 Pe* 14 26 40.3306297920 -02 54 27.487168164   15.892 15.45 14.887 14.54 ~ 40 0
91 HE 1432-1819 Pe* 14 35 22.8327208224 -18 32 21.932462832   16.921 16.38     CEMP-no 4 0
92 HE 1434-1442 Pe* 14 37 26.5888740672 -14 54 59.398236216     15.40   15.395 CEMP-s 17 0
93 HE 1439-0218 Pe* 14 41 58.3240435344 -02 31 27.158341764   16.428 15.884 16.119   CEMP-no 4 0
94 HE 1439-1420 Pe* 14 42 09.3041659282 -14 32 56.578736690   16.086 15.529 15.546   CEMP-s 6 0
95 HE 1443+0113 Pe* 14 46 16.3657593360 +01 01 09.894018540   16.925 15.735 15.358   CEMP-s 13 0
96 HE 1446-0140 Pe* 14 49 29.6264132524 -01 52 42.341685547   16.477 15.889     A0 4 0
97 HE 1456+0230 Pe* 14 59 22.6620071616 +02 18 15.784549020   15.901 15.219 15.167   CEMP-no 13 0
98 HE 1500-1628 Pe* 15 02 56.6325874248 -16 40 07.192639704   15.652 14.788 14.706 13.691 ~ 5 0
99 HE 1509-0806 Pe* 15 11 41.5759807848 -08 17 40.212299184   15.729 14.822 14.181   CEMP-s 15 0
100 LP 622-13 PM* 15 12 07.1187239832 -03 03 49.364137620   14.56 14.04 14.30 13.17 dF 10 0
101 HE 1515-1055 Pe* 15 18 15.3293267184 -11 06 50.766564564   14.470 13.895 13.895   ~ 3 0
102 BPS CS 22878-0101 Pe* 16 45 31.4513454168 +08 14 45.470265900   14.601   13.603 12.673 KIIvw 62 0
103 G 139-8 PM* 17 01 43.9814900086 +16 09 03.342064636   11.918 11.470 11.128 10.779 sd:F 53 0
104 [BS61] 119 RG* 17 20 16.1310888024 +57 52 55.986313692   18.62 17.635 16.859 16.224 ~ 38 0
105 BD+17 3248 HB* 17 28 14.4690179544 +17 30 35.847574776   10.02 9.34     KIIvw 239 0
106 BPS BS 17447-0029 Pe* 17 49 03.9023568528 +60 11 56.469832224   14.03 13.53 13.54   ~ 7 0
107 NAME SDG G 18 55 19.0 -30 32 43   4.5 3.6     ~ 2438 2
108 BPS CS 22950-0046 Pe* 20 21 28.3975657104 -13 16 33.601931364   15.13 14.224 13.639 13.066 CEMP-no 43 0
109 HE 2122-4707 Pe* 21 25 44.5036856403 -46 54 11.705888852   16.163 15.243 15.212   CEMP-r/s 8 0
110 HE 2133-1426 Pe* 21 36 07.2254763984 -14 12 35.378391672 15.698 15.985 15.506 15.526 14.845 CEMP-s 12 0
111 BPS CS 22948-0043 * 21 40 16.3858184160 -41 58 54.475785012 13.499 13.437 13.392 13.633   ~ 7 0
112 HE 2138-4250 Pe* 21 41 42.6797235984 -42 36 28.839258252   16.200 15.256 15.077   C 2 0
113 HE 2148-1247 Pe* 21 51 17.9096426016 -12 33 41.557315896   15.266 14.740 14.582   CEMP-r/s 51 0
114 HE 2155-3750 Pe* 21 58 09.7391652941 -37 36 19.269981780   14.274 13.272 13.207   CEMP-s 5 0
115 HE 2158-0348 Pe* 22 00 39.9762999888 -03 34 12.068228532   16.433 15.473 15.514 14.726 CEMP-s 23 0
116 HE 2200-1946 Pe* 22 03 02.2522684468 -19 32 19.449985959   16.773 16.251 16.077   ~ 3 0
117 HE 2203-3723 Pe* 22 06 30.1748984472 -37 09 12.576509244   16.793 16.110 16.234   ~ 3 0
118 HE 2204-4034 * 22 07 38.0538346244 -40 20 14.155561309   15.917 15.522 15.369   ~ 3 0
119 HE 2209-1240 * 22 11 48.7627266768 -12 25 45.187710204   16.196 15.687 15.685   ~ 4 0
120 HE 2209-3909 * 22 12 00.8516175589 -38 55 03.736455118   16.235 15.837 15.747   ~ 2 0
121 BPS CS 22892-0052 Pe* 22 17 01.6558764360 -16 39 27.051026544   14.03 13.20 13.06 12.19 KIIvw 472 0
122 HE 2215-2548 Pe* 22 17 58.6422094992 -25 33 22.328173188   16.296 15.649 15.505   ~ 5 0
123 HE 2217-4053 Pe* 22 20 39.3495685224 -40 38 40.708791132   16.635 16.094 15.856   ~ 4 0
124 HE 2232-0603 Pe* 22 34 47.4285458448 -05 48 17.341180596   16.861 16.51 15.894 15.591 ~ 18 0
125 HE 2236+0204 Pe* 22 39 23.4267088723 +02 19 48.670171602   15.730 14.878 14.816   ~ 3 0
126 HE 2244-2116 Pe* 22 46 50.7380117335 -21 00 43.116545595   16.375 15.706 15.989   ~ 6 0
127 HE 2249-1704 Pe* 22 51 49.7146486550 -16 49 00.474168558   16.360 15.258 14.956   ~ 7 0
128 HE 2251-0821 Pe* 22 54 08.1340075114 -08 05 43.935562594   16.433 15.720 15.469   CEMP-s 4 0
129 HE 2314-1554 Pe* 23 17 01.1312522376 -15 37 49.498603788   15.355 14.695 14.252 13.781 CEMP-no 10 0
130 HE 2323-0256 Pe* 23 26 29.8073738880 -02 39 58.036383180   15.125 14.321 14.289 13.358 CEMP-no 184 0
131 HE 2339-5105 * 23 42 22.1442588755 -50 48 38.651909077   16.644 15.940 15.865   ~ 2 0
132 HE 2341-2029 Pe* 23 44 19.6466439744 -20 13 19.752402936   16.780 16.181     ~ 5 0
133 BPS CS 22966-0048 Pe* 23 46 44.3746592040 -27 44 10.780190952 15.053 15.307 14.816 14.907   ~ 12 0
134 HE 2353-1758 Pe* 23 56 12.9753185184 -17 42 04.053637548   16.456 15.408 15.103   ~ 2 0
135 HE 2356-0410 Pe* 23 59 13.1419841280 -03 53 48.220213560   14.39 13.60 13.164 12.713 CEMP-no 88 0

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