2011AJ....141..102K

Query : 2011AJ....141..102K

2011AJ....141..102K - Astron. J., 141, 102 (2011/March-0)

[O/Fe] estimates for carbon-enhanced metal-poor stars from near-infrared spectroscopy.

KENNEDY C.R., SIVARANI T., BEERS T.C., LEE Y.S., PLACCO V.M., ROSSI S., CHRISTLIEB N., HERWIG F. and PLEZ B.

Abstract (from CDS):

We report on oxygen abundances determined from medium-resolution near-infrared spectroscopy for a sample of 57 carbon-enhanced metal-poor (CEMP) stars selected from the Hamburg/ESO Survey. The majority of our program stars exhibit oxygen-to-iron ratios in the range +0.5< [O/Fe]<+2.0. The [O/Fe] values for this sample are statistically compared to available high-resolution estimates for known CEMP stars as well as to high-resolution estimates for a set of carbon-normal metal-poor stars. Carbon, nitrogen, and oxygen abundance patterns for a sub-sample of these stars are compared to yield predictions for very metal-poor asymptotic giant branch (AGB) abundances in the recent literature. We find that the majority of our sample exhibit patterns that are consistent with previously studied CEMP stars having s-process-element enhancements and thus have very likely been polluted by carbon- and oxygen-enhanced material transferred from a metal-poor AGB companion.

Abstract Copyright: ∼

Journal keyword(s): Galaxy: halo - stars: abundances - stars: AGB and post-AGB - stars: Population II - techniques: spectroscopic

Simbad objects: 58

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Number of rows : 58
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 [BEM91] 1 C* 00 05 24.9990683544 +01 10 03.825214860   15.02 13.30   12.153 C-R 17 0
2 SKB 1 C* 00 13 19.6132758624 -30 34 55.295652324   14.44 12.86   11.487 C2,3: 10 0
3 HE 0017+0055 Pe* 00 20 21.6000581352 +01 12 06.817571136   12.991 11.66 10.773 10.186 CEMP-rs 30 0
4 V* ST Phe C* 00 36 06.2362050672 -55 49 28.198545672   12.76 13.10     N 13 0
5 HE 0043-2433 C* 00 45 43.9646409096 -24 16 48.075810312   14.14 13.10     C 3 0
6 SKB 5 SB* 01 13 46.4934118488 -13 30 48.980956752   14.0 12.5 11.857 11.361 CEMP-s 20 1
7 HE 0120-5834 C* 01 22 00.6716240136 -58 18 55.630579212   15.71 14.4 13.612 13.146 C 4 0
8 HE 0140-3956 C* 01 42 54.9099819768 -39 41 09.238100568   14.81 13.30   12.296 C 4 0
9 HE 0151-0341 SB* 01 53 43.3049091528 -03 27 14.456628576   14.67 13.40   12.521 CEMP-rs 11 0
10 HE 0155-2221 C* 01 57 33.7116139872 -22 07 06.658377708   17.17 15.30   13.742 C 3 0
11 HE 0206-1916 Pe* 02 09 19.6321025088 -19 01 55.451633016   15.133 13.999 13.458 12.987 CEMP-s 22 0
12 HE 0219-1739 Pe* 02 21 41.2958950176 -17 25 37.031081124   15.85 14.10 14.035 13.444 CEMP-no 10 0
13 BD+44 493 Pe* 02 26 49.7390353632 +44 57 46.523771136   9.63 9.11 9.073   CEMP-no 116 0
14 HE 0251-2118 C* 02 53 42.5869719720 -21 05 59.069325984   14.67 13.30     C 2 0
15 HE 0310+0059 C* 03 12 56.9142354648 +01 11 09.602439576   12.902 11.761     C 19 0
16 C* 139 C* 03 17 22.1830935120 -01 32 36.506009184   13.33 11.6     R8 11 0
17 HE 0319-0215 SB* 03 21 46.2603171576 -02 04 33.952124424   15.03 13.60   12.603 CEMP-rs 14 0
18 SOPS V 46 C* 03 33 00.4402711368 -28 05 14.197559244   14.25 12.70     C 5 0
19 HE 0359-0141a HB* 04 01 47.1177730128 -01 33 31.499013564   17.1 16.9     ~ 2 1
20 HE 0408-1733 Pe* 04 11 06.0266169456 -17 25 39.745266096   13.511 12.335     CEMP-mp 11 0
21 HE 0417-0513 C* 04 19 46.8330027360 -05 06 17.210970288   15.01 13.70     C 6 0
22 HE 0419+0124 C* 04 21 40.3986507720 +01 31 46.189842744   14.44 13.00     C 5 0
23 HE 0429+0232 C* 04 31 53.7432788424 +02 39 00.487238688   14.65 13.30     C 4 0
24 HE 0430-1609 Pe* 04 32 50.9240264664 -16 03 38.824888860   14.48 13.1 12.527 12.008 CEMP-s 13 0
25 HE 0439-1139 C* 04 41 24.9636755688 -11 33 25.930810080           C 4 0
26 HE 0457-1805 SB* 04 59 43.5583741416 -18 01 11.984949192   12.388 11.009 10.751   CEMP 12 0
27 HE 0458-1754 C* 05 00 34.5275725392 -17 50 21.317994240   13.88 12.70     C 3 0
28 HE 0507-1653 SB* 05 09 16.5603215496 -16 50 04.688981556   13.633 12.507 12.002 11.579 CEMP-s 26 0
29 HE 0518-1751 C* 05 20 28.4570994888 -17 48 42.673199112   13.85 12.80     C 3 0
30 HE 0519-2053 C* 05 21 54.4181677512 -20 50 35.314253772   14.88 13.70     C 5 0
31 HE 0547-4428 C* 05 48 37.5951444096 -44 27 20.325604248   15.41 13.50     C 2 0
32 HE 1011-0942 C* 10 14 24.9831637200 -09 57 54.895231296   15.85 14.20 13.277   C 8 0
33 HE 1023-1504 C* 10 25 55.5476831832 -15 19 17.082309648   16.26 14.40 14.143 13.470 C 6 0
34 HE 1125-2942 C* 11 27 57.8992548216 -29 59 04.608336012   15.40 13.70   12.247 C 3 0
35 HE 1145-0002 Pe* 11 47 59.7747186600 -00 19 18.352016976   15.08 13.60 12.474 11.967 C-H 16 0
36 HE 1152-0430 C* 11 54 41.8521463968 -04 47 04.804553400   15.41 14.00   13.234 C 4 0
37 HE 1152-0355 Pe* 11 55 06.0576787728 -04 12 24.591877812 15.432 13.889 11.43 10.64 10.236 CEMP-s 26 0
38 HE 1204-0600 C* 12 07 11.6017309488 -06 17 06.137242044   15.36 14.00     C 4 0
39 CD-31 9518 C* 12 09 38.0511631824 -32 13 04.940223024   12.948 11.599     C 10 0
40 HE 1230-0230 Pe* 12 33 26.3892813432 -02 47 07.333233720   14.07 12.70     C-H 4 0
41 HE 1238-0435 C* 12 41 33.1588983000 -04 52 05.129683320   15.41 14.10 13.126 12.663 C-H 7 0
42 HE 1246-1510 C* 12 49 24.7859093328 -15 26 33.029177604   15.57 14.10   12.248 C 3 0
43 BD-22 3481 C* 12 58 01.1862731328 -23 40 24.218338044   11.971 10.632     C 8 0
44 HE 1331-0247 Pe* 13 34 31.9615314048 -03 02 29.053665132   14.32 13.00     C-H 7 0
45 HE 1410-0125 C* 14 13 24.7912699824 -01 39 53.401541364   13.719 12.069 11.483 11.072 C 6 0
46 HE 1418+0150 SB* 14 21 01.1688766320 +01 37 17.834854152   13.7 12.205 11.335 10.936 CEMP-s 15 0
47 HE 1428-1950 C* 14 30 59.3926155264 -20 03 41.914188864   13.276 12.040   10.770 C 21 0
48 FBS 1431-079 C* 14 34 32.6247493944 -08 08 36.870122940   15.01 13.50     C-H 8 1
49 HE 1524-0210 C* 15 26 56.8884986496 -02 20 44.475443772   14.83 13.30   12.745 C 4 0
50 HE 2115-0522 C* 21 18 11.8147441152 -05 10 06.881787156   15.52 14.30     C 3 0
51 HE 2145-1715 C* 21 48 44.4614185968 -17 01 02.459780220   14.59 13.20     C 4 0
52 HE 2153-2323 Pe* 21 56 37.5847822872 -23 09 25.420064616   16.10 14.50   13.403 CEMP-s 9 1
53 V* U Aqr RC* 22 03 19.6990459464 -16 37 35.281076700   12.16 11.17     C-Hd 106 0
54 CGCS 5584 C* 22 10 37.5207164496 -17 31 38.471581056   12.14 10.93 10.75 9.898 C 7 0
55 HE 2221-0453 Pe* 22 24 25.6258778472 -04 38 02.318811828   15.098 13.650 12.942 12.376 CEMP-s 23 0
56 HE 2224-0330 C* 22 26 47.8189666848 -03 14 57.479869824   14.58 13.50     C 3 0
57 HE 2228-0137 C* 22 31 26.1771445008 -01 21 42.101569620   16.26 14.70   13.195 C 4 0
58 HE 2339-0837 C* 23 41 59.9349428016 -08 21 18.608906664   15.32 14.00   13.271 C 8 0

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