2004AJ....128.2402L

Query : 2004AJ....128.2402L

2004AJ....128.2402L - Astron. J., 128, 2402-2419 (2004/November-0)

Abundances of extremely metal-poor star candidates.

LAI D.K., BOLTE M., JOHNSON J.A. and LUCATELLO S.

Abstract (from CDS):

We present chemical abundances for 110 stars identified in objective-prism surveys as candidates for being very metal-poor. The abundances are derived from high-S/N, intermediate-resolution spectra obtained with the Keck Observatory Echellette Spectrograph and Imager (ESI). An additional 25 stars with well-determined abundances ranging from [Fe/H]=-1.5 to -3.2 were observed and the results used to help calibrate our analysis and determine the accuracy of our abundance determinations. Abundances for the program stars were measured for Fe, Mg, Ca, Ti, Cr, and Ba with an accuracy of approximately 0.3 dex. Fifty-three of the stars in our sample have [Fe/H]≤-2, 22 have [Fe/H]≤-2.5, and 13 have [Fe/H]≤-2.9. Surprisingly, approximately one-third of the sample is relatively metal-rich, with [Fe/H]>-1.5. In addition to identifying a number of extremely metal-poor stars, this study also shows that moderate-resolution spectra obtained with the Keck ESI yield relatively accurate abundances for stars as faint as V=14 with modest exposure time (∼20 minutes). This capability will prove useful if the so-far elusive stars at [Fe/H]←4 turn out to be mostly fainter than V=15.

Abstract Copyright: ∼

Journal keyword(s): Instrumentation: Spectrographs - Stars: Abundances - Stars: Population II

VizieR on-line data: <Available at CDS (J/AJ/128/2402): stars.dat table2.dat ew.dat table7.dat table8.dat table9.dat refs.dat>

CDS comments: M15-S4 = Cl* NGC 7078 SANSA S4, M15-K341 = NGC 7078 341, M 92 VII-18 = NGC 6341 7018

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 BPS CS 22957-0022 Pe* 00 01 45.4879341216 -05 49 46.650927828   13.95 13.34     ~ 22 0
2 2MASS J00082794+1054198 Pe* 00 08 27.9327429648 +10 54 19.831856724   14.62 14.0     ~ 13 0
3 TYC 5841-127-1 Pe* 00 10 17.5934312016 -17 35 38.898139920   11.80 11.28     ~ 12 0
4 LP 764-105 Pe* 00 13 41.4735624216 -14 37 51.471681600   14.12 13.57 13.45   ~ 4 0
5 BPS CS 31070-0058 Pe* 00 14 33.9249754368 +05 51 44.591566824 14.401 14.281 13.517 12.981 12.498 ~ 5 0
6 BPS CS 31069-0064 Pe* 00 16 12.5579630472 +04 49 34.638691260   14.49 13.81 13.89   ~ 4 0
7 BPS BS 17570-0090 Pe* 00 25 43.7645386944 +23 05 36.609454032   13.56 13.10 13.08   ~ 9 0
8 BPS CS 31062-0050 Pe* 00 30 31.0646803224 -12 05 10.877225064   13.7 13.05 12.681 12.309 CEMP-r/s 70 0
9 HE 0044-2459 RG* 00 46 35.8758070056 -24 43 02.290921248   14.49 13.87 13.92 12.948 ~ 26 0
10 BPS CS 22166-0016 Pe* 00 58 23.8415767344 -14 47 06.878622912   13.34 12.75 12.324 11.898 CEMP-no 24 0
11 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
12 BPS CS 22183-0031 Pe* 01 09 05.0900915136 -04 43 21.343580436   14.24 13.62 13.178 12.724 ~ 52 0
13 HD 6755 SB* 01 09 43.0577179701 +61 32 50.264076956 8.48 8.40   7.3   G5 252 0
14 BPS CS 22174-0012 Pe* 01 14 16.1665082880 -08 29 49.277820336   15.63 15.13 15.07   F5 7 0
15 BD-16 251 RG* 01 29 31.1311443552 -16 00 45.495314460 12.527 12.427 11.642 11.189 10.713 CEMP 318 0
16 BPS CS 22180-0005 Pe* 01 34 27.8768665824 -10 16 21.077840964   14.60 14.05 13.97   ~ 7 0
17 LAWD 10 WD* 01 37 59.3936818351 -04 59 44.668541360   13.20 12.83 12.8   DA+D1 191 0
18 BPS CS 29510-0058 Pe* 02 21 46.5781548912 -24 01 58.700555292   14.2 13.5 13.070 12.628 ~ 11 0
19 BPS CS 29510-0008 PM* 02 31 24.8680254216 -24 00 22.165660836   14.31 13.74     ~ 2 0
20 BPS CS 22189-0003 * 02 32 19.7198191056 -15 06 43.681465548 12.93 13.81 13.54     ~ 3 0
21 BPS CS 31063-0069 Pe* 02 32 50.2160620008 +05 45 04.498533180   14.39 13.98 13.83   ~ 9 0
22 BPS CS 22963-0004 Pe* 02 56 46.5715607688 -04 51 17.421404184   15.51 14.98     ~ 30 0
23 BPS CS 31079-0028 Pe* 03 01 00.6866893176 +06 16 31.808500140   13.900 13.211 12.713 12.190 ~ 39 0
24 HE 0315-1528 Pe* 03 17 36.0539075280 -15 17 22.698017664   14.05 13.34 12.853 12.372 CEMP-no 23 0
25 BPS CS 31083-0059 * 03 21 14.5064051928 +09 13 04.834216056   14.18 13.41     ~ 3 0
26 BPS CS 22190-0007 HB* 03 52 21.7998585840 -16 24 32.551543692   14.66 14.2   13.504 ~ 13 0
27 BPS BS 17585-0080 * 04 23 01.9067011392 +15 14 56.544421632 14.598 14.267 13.159     ~ 3 0
28 BD+37 1458 Pe* 06 16 01.5222885381 +37 43 18.754343426 9.41 9.52 8.92 8.34 7.91 G0 146 0
29 HD 44007 Pe* 06 18 48.5269024752 -14 50 43.423248948   8.85 8.06 7.69   G5(IV)wF3/5 197 0
30 HD 63791 PM* 07 54 28.7247271128 +62 08 10.773103272   8.81 7.90     G0 119 0
31 2MASS J08242941+3813081 Pe* 08 24 29.4357284544 +38 13 07.961490804 13.737 13.95 13.5     ~ 5 0
32 BPS BS 17444-0055 * 08 30 28.4 +40 34 25   13.694 13.983 12.825 12.627 ~ 3 0
33 HD 74462 RG* 08 48 20.6518818744 +67 26 59.884515744   9.65 8.69 8.25   G5IV 140 0
34 2MASS J08541250+2919146 Pe* 08 54 12.5040787728 +29 19 14.516972436     14.4     ~ 5 0
35 BPS BS 17139-0018 * 08 55 31.2117822096 +30 27 51.227710344   14.86 14.39 14.29   ~ 2 0
36 BD-03 2525 SB* 08 59 10.1118302427 -04 01 36.525356927   10.114 9.648 9.335 9.005 F3 139 0
37 BPS BS 17581-0042 * 09 16 47.4165636024 -10 49 31.137696192   14.25 13.66 13.64   ~ 5 0
38 BPS BS 17581-0052 * 09 19 35.9949679488 -07 42 38.707334244   13.62 12.93 12.88   ~ 2 0
39 BPS BS 17572-0048 * 09 20 10.9404960528 -02 33 57.062276676   14.56 13.97 14.05   ~ 2 0
40 BPS BS 17581-0113 EB* 09 22 36.2344621680 -10 45 31.390137648   13.49 12.93     ~ 5 0
41 BPS BS 17572-0067 PM* 09 24 56.3739125232 -02 52 01.258505832   13.83 13.37 13.25   ~ 3 0
42 BPS BS 17581-0093 * 09 27 44.5651934856 -08 20 08.523490344   13.57 13.03 12.96   ~ 2 0
43 BPS BS 17581-0101 * 09 27 55.6872915408 -12 28 05.725542432   13.49 12.80     ~ 3 0
44 BD-02 2914 Pe* 09 31 01.0248493200 -03 04 05.315211300   10.978 10.505     ~ 19 0
45 BPS BS 17587-0003 * 09 39 42.4854283128 -13 12 38.356789572   13.72 13.17 13.11   ~ 2 0
46 BPS BS 17587-0016 * 09 40 33.2688022056 -13 23 29.494619808   13.74 13.21 13.15   ~ 2 0
47 BPS BS 17587-0021 Pe* 09 42 06.3265487112 -12 07 31.832813316   13.92 13.27 13.11   ~ 5 0
48 BPS BS 17577-0054 * 09 42 11.6893975824 -11 20 35.833443792   14.36 13.76     ~ 2 0
49 TYC 4901-1212-1 Pe* 09 46 47.3068507800 -07 05 34.131906096   12.47 11.93     ~ 6 0
50 HD 84937 Pe* 09 48 56.0992891997 +13 44 39.326709913 8.49 8.68 8.32 7.97 7.70 F8Vm-5 831 0
51 BPS BS 17587-0099 * 09 53 05.8504174440 -12 36 50.923006164   14.29 13.72 13.82   ~ 3 0
52 BPS BS 17587-0118 * 09 58 05.4730511136 -15 11 24.032443344   14.04 13.42 13.43   ~ 2 0
53 2MASS J10442610-1257234 * 10 44 26.11 -12 57 23.5   13.52 13.00     ~ 2 0
54 BPS BS 17137-0020 HB* 10 51 01.8261666576 +34 01 35.630935140   13.9 13.669 13.7   A1.8 9 0
55 HD 94028 PM* 10 51 28.1256073369 +20 16 38.965439278 8.51 8.69 8.22 7.82 7.54 F8 375 0
56 BPS BS 17439-0038 * 10 53 07.6981761240 -16 27 07.657648344   14.05 13.37 13.32   ~ 2 0
57 BPS BS 17439-0062 * 10 59 44.5724885136 -15 06 07.956434412   13.71 13.14     ~ 2 0
58 BPS BS 16077-0007 Pe* 11 35 17.9891075856 +31 00 23.431937724   12.79 12.40 12.49   ~ 19 0
59 BPS BS 16986-0072 Pe* 12 03 57.1139818368 +08 02 45.971418840   14.46 13.42 13.05   ~ 5 0
60 BPS BS 16920-0017 Pe* 12 07 16.8335931408 +41 39 32.430850740   14.69 13.93 13.368 12.877 ~ 20 0
61 BPS BS 16470-0073 PM* 12 19 34.8541483608 +14 40 23.063262348   14.89 14.16     ~ 3 0
62 BPS BS 16928-0053 Pe* 12 22 28.0240827648 +34 11 31.690230360   14.38 13.54 12.886 12.339 ~ 25 0
63 BPS BS 16470-0092 Pe* 12 23 38.7327158880 +14 41 15.993047400   14.44 14.00 13.91   ~ 3 0
64 BPS BS 16085-0050 Pe* 12 37 46.6781374776 +19 22 49.551755664 12.965 12.93 12.16 11.668 11.186 ~ 32 0
65 2MASS J12482275+2056440 Pe* 12 48 22.7519584056 +20 56 44.029766004   13.88 13.4 13.115 12.706 ~ 25 0
66 BPS BS 16929-0005 Pe* 13 03 29.4751261824 +33 51 09.242978436 14.109 14.228 13.610 13.208 12.766 CEMP-no 41 0
67 BPS BS 16972-0003 Pe* 13 09 05.5811768472 +15 24 09.082107648   14.63 14.24 14.35   ~ 4 0
68 BPS BS 16972-0013 * 13 16 38.8607645952 +13 32 28.096363248     13.581     ~ 4 0
69 HD 115444 Pe* 13 16 42.4590842616 +36 22 52.692135420   9.77 8.97 8.3 7.88 G9V 252 0
70 2MASS J13190461+0606049 Pe* 13 19 04.6149616560 +06 06 05.052068172   13.12 12.6     ~ 4 0
71 BPS BS 16543-0092 Pe* 13 25 22.0379572608 +19 29 40.126463988   15.03 14.22 14.15   ~ 5 0
72 BPS CS 30311-0012 LM* 13 25 22.3832657904 +06 00 28.813902948   14.81 13.91     M 5 0
73 BPS BS 16934-0009 * 13 31 21.8973692424 +15 05 21.112587492   13.96 12.71 12.42   ~ 2 0
74 BPS BS 16467-0062 Pe* 13 42 00.6326009568 +17 48 40.826539260   14.69 14.09 13.665 13.216 ~ 53 0
75 2MASS J13442597+1344282 Pe* 13 44 25.9622710792 +13 44 28.079113856   14.54 14.1     ~ 4 0
76 BPS CS 30320-0069 Pe* 13 58 52.2722883408 +10 51 40.541217084   15.04 14.60 14.54   ~ 8 0
77 HD 122563 Pe* 14 02 31.8455084952 +09 41 09.944391876 7.47 7.10 6.19 5.37 4.79 G8:III:Fe-5 920 0
78 2MASS J14102002+1032113 Pe* 14 10 20.0321546520 +10 32 11.311197360   14.92 14.41     ~ 4 0
79 BPS BS 16550-0087 Pe* 14 10 26.7272915496 +18 01 23.732433480   14.59 13.76 13.211 12.688 ~ 28 0
80 2MASS J14164424+0909336 Pe* 14 16 44.2387984944 +09 09 33.625550952   14.98 14.58     ~ 6 0
81 BPS BS 16546-0076 HV* 14 26 23.7716196408 +11 58 41.951844660   14.55 13.71 13.59   G7 3 0
82 2MASS J14325691+0646069 Pe* 14 32 56.9231765928 +06 46 06.974256288   14.94 14.22 13.727 13.224 ~ 37 0
83 HE 1430+0053 Pe* 14 33 16.5345630936 +00 40 48.883742256   14.280 13.663 13.252 12.813 ~ 17 0
84 BPS BS 16981-0018 * 14 35 11.0688280632 -02 08 23.333177328   14.57 13.81 13.72   ~ 2 0
85 BPS BS 16472-0018 Pe* 14 56 21.0671858808 +01 52 34.946698260     13.560     ~ 5 0
86 2MASS J15051979+0617069 Pe* 15 05 19.8064435128 +06 17 06.933083424   13.64 12.88 12.387 11.893 CEMP 22 0
87 BPS CS 30301-0043 * 15 06 15.1652548656 +00 52 43.103569872   14.27 13.03 12.72   ~ 2 0
88 BPS BS 16472-0081 * 15 09 47.7316062792 -01 19 35.315192892   14.69 13.85 13.82   ~ 2 0
89 LP 622-13 PM* 15 12 07.1187239832 -03 03 49.364137620   14.56 14.04 14.30 13.17 dF 10 0
90 BPS BS 16547-0005 * 15 12 18.7786159104 -02 29 59.134406712   13.75 12.90 12.77   ~ 2 0
91 BPS CS 30306-0126 Pe* 15 15 18.5445786360 +06 20 25.734282612   14.37 13.86 13.89   ~ 3 0
92 BPS BS 16547-0025 Pe* 15 15 37.7590229520 -03 20 38.816359872   14.41 13.63 13.42   ~ 3 0
93 BPS BS 16547-0032 * 15 16 37.8849814920 -03 23 30.913593360   14.66 13.91     ~ 2 0
94 BPS CS 30306-0110 Pe* 15 16 51.1442889600 +04 49 01.502183352   13.58 13.17 13.18   ~ 4 0
95 BPS BS 16551-0058 * 15 18 54.9958913832 -08 54 11.868303384   14.29 13.49     ~ 2 0
96 BPS BS 17446-0025 * 15 19 38.3 +44 23 36           ~ 2 0
97 BPS CS 30306-0082 Pe* 15 21 25.3346584080 +05 57 32.309177868   15.40 14.82 14.66   ~ 4 0
98 BPS BS 16559-0060 * 15 21 29.5874874048 -02 08 25.354365036   14.83 14.12 14.31   ~ 2 0
99 V* V436 Ser BY* 15 23 46.1124624648 -00 44 24.721901592   12.27 11.13 10.78 9.605 K1e 19 1
100 2MASS J15240336-0253538 * 15 24 03.36 -02 53 53.9   14.26 13.43     ~ 2 0
101 BPS BS 16547-0082 * 15 25 06.4149783360 -03 17 04.926080652   14.73 13.94     ~ 2 0
102 BPS BS 16559-0083 * 15 25 06.5063428392 -00 31 54.618166128   14.45 13.73     ~ 2 0
103 BPS BS 16547-0099 * 15 26 28.1421412416 -02 37 07.536585000   14.87 14.12 14.22   ~ 2 0
104 BPS BS 16559-0108 * 15 29 54.5907098784 -00 32 11.756292000   14.96 14.22 14.14   ~ 2 0
105 BPS CS 30329-0129 Pe* 15 31 39.0679206264 -06 48 39.803187708 14.876 14.81 14.11     ~ 5 0
106 BPS CS 30329-0078 * 15 36 42.0177026400 -04 47 59.070864480   14.70 13.94 13.81   ~ 2 0
107 BPS BS 16084-0160 Pe* 16 28 50.7923247984 +54 37 06.886218324   13.94 13.12 12.630 12.103 ~ 22 0
108 2MASS J16391853+6057426 Pe* 16 39 18.5345769192 +60 57 42.547552920   13.50 12.79   11.786 ~ 20 0
109 BPS CS 22878-0101 Pe* 16 45 31.4513454168 +08 14 45.470265900   14.601   13.603 12.673 KIIvw 62 0
110 BPS BS 16080-0093 Pe* 16 50 38.3051346312 +59 13 06.553935984   14.30 13.6     ~ 14 0
111 NGC 6341 7018 RG* 17 16 37.4894075472 +43 06 15.600437640   13.47 12.18     ~ 77 0
112 BD+23 3130 Pe* 17 32 41.6247211304 +23 44 11.625460773     8.9 8.6   G0III 144 0
113 BD+02 3375 Pe* 17 39 45.5948675731 +02 24 59.606824535 10.18 10.40 9.92 9.47 9.12 A5 205 0
114 HD 163810 ** 17 58 38.4538029750 -13 05 49.654844460 10.15 10.23 9.63     G3V 158 0
115 2MASS J20323450-1547579 Pe* 20 32 34.5063263880 -15 47 57.910275996   14.30 13.7     ~ 8 0
116 BPS CS 22880-0086 Pe* 20 45 47.5279506312 -18 33 32.356128240   15.08 14.32 14.36   ~ 21 0
117 BPS CS 22898-0027 Pe* 21 05 45.0996805992 -18 36 57.501493128   13.26 12.76 12.476 12.094 CEMP-r/s 88 0
118 BPS CS 30331-0018 Pe* 21 21 02.6287362216 -23 10 55.168850496   14.77 14.11 13.96   ~ 3 0
119 HD 204543 * 21 29 28.2126852216 -03 30 55.353564216   9.17 8.30 7.99   F6/8(V) 144 0
120 NGC 7078 341 RG* 21 29 54.9258244080 +12 13 22.484816292   13.72 12.54   11.22 ~ 61 0
121 NGC 7078 825 RG* 21 30 02.2438203288 +12 11 21.492968820   13.62 12.38   11.05 ~ 57 0
122 BPS CS 22944-0032 Pe* 21 47 43.2239742552 -13 40 22.958906592   13.87 13.28     ~ 21 0
123 BPS CS 22965-0016 Pe* 21 57 07.9207556880 -04 34 08.378375016 14.860 14.81 14.05     ~ 15 0
124 BPS CS 22965-0029 Pe* 21 59 32.2229364456 -03 36 37.701058428   14.295 13.5 13.656   ~ 11 0
125 BPS CS 22892-0052 Pe* 22 17 01.6558764360 -16 39 27.051026544   14.03 13.20 13.06 12.19 KIIvw 472 0
126 BPS CS 29502-0092 Pe* 22 22 35.9982138384 -01 38 27.620508552   12.64 11.87 11.365 10.862 CEMP-no 67 0
127 BPS CS 30332-0114 Pe* 22 34 38.6137908408 +08 49 05.349373500   14.73 14.12 14.12   ~ 4 0
128 BPS CS 30332-0067 PM* 22 40 48.1113570984 +11 36 03.578571648   14.77 14.17 14.16   ~ 3 0
129 BPS CS 22893-0010 Pe* 22 58 11.7253311672 -11 56 45.431946204   15.34 14.73 14.70   ~ 19 0
130 LP 582-22 PM* 23 12 53.2710003144 +08 19 49.761072300   13.95   13.6   ~ 6 0
131 BPS CS 30315-0093 Pe* 23 16 16.7966472408 -25 08 59.088357564   14.68 14.14     ~ 4 0
132 BPS CS 22949-0029 * 23 22 04.3440131472 -03 50 58.473887856   15.13 14.46 14.75   ~ 6 0
133 BPS CS 22949-0048 Pe* 23 26 07.4169241824 -05 50 06.903492036   14.48 13.67 13.154 12.639 CEMP-no 38 0
134 BPS CS 31088-0083 Pe* 23 32 36.1276820808 +05 15 29.090290788   14.07 13.36 13.38   ~ 3 0
135 2MASS J23542883-1359567 Pe* 23 54 28.8416902968 -13 59 56.701755456 14.734 14.7 14.2 13.946 13.515 ~ 10 0

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