2011ApJ...730...77H

Query : 2011ApJ...730...77H

2011ApJ...730...77H - Astrophys. J., 730, 77 (2011/April-1)

Spectroscopic studies of extremely metal-poor stars with the Subaru high dispersion spectrograph. V. The zn-enhanced metal-poor star BS 16920-017.

HONDA S., AOKI W., BEERS T.C. and TAKADA-HIDAI M.

Abstract (from CDS):

We report Zn abundances for 18 very metal-poor stars studied in our previous work, covering the metallicity range -3.2< [Fe/H] ←2.5. The [Zn/Fe] values of most stars show an increasing trend with decreasing [Fe/H] in this metallicity range, confirming the results found by previous studies. However, the extremely metal-poor star BS 16920-017([Fe/H] =-3.2) exhibits a significantly high [Zn/Fe] ratio ([Zn/Fe] = +1.0). Comparison of the chemical abundances of this object with HD 4306, which has similar atmospheric parameters to BS 16920-017, clearly demonstrates a deficiency of α elements and neutron-capture elements in this star, along with enhancements of Mn and Ni, as well as Zn. The association with a hypernova explosion that has been proposed to explain the high Zn abundance ratios found in extremely metal-poor stars is a possible explanation, although further studies are required to fully interpret the abundance pattern of this object.

Abstract Copyright: ∼

Journal keyword(s): nuclear reactions, nucleosynthesis, abundances - stars: abundances - stars: individual: BS 16920-017 - stars: Population II - supernovae: general

CDS comments: UMa II-S1 = 2MASS J08495341+6308216 in Simbad.

Simbad objects: 26

goto Full paper

goto View the references in ADS

Number of rows : 26
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 HD 4306 SB* 00 45 27.1616035344 -09 32 39.785396712 9.80 9.75 9.02 8.75   G3/5w(A) 168 0
2 HD 6268 Pe* 01 03 18.1716378504 -27 52 49.953768852   9.725 9.046 8.601   F/Gw 166 0
3 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
4 G 4-36 PM* 02 43 22.0483919796 +13 25 56.981522451   11.989 11.471 11.133 10.795 ~ 73 0
5 BD+80 245 Pe* 08 11 06.2398198478 +79 54 29.556322137   10.50 9.96 9.88   G0 123 0
6 [FSG2010] UMaII-S1 RG* 08 49 53.4624869976 +63 08 21.677104536           ~ 15 0
7 NAME UMa II Galaxy G 08 51 30.0 +63 07 48     13.3     ~ 410 0
8 NAME Sextans dSph LSB 10 13 02.9 -01 36 53   12 10.4     ~ 921 0
9 HD 88609 Pe* 10 14 28.9853799600 +53 33 39.342740796 9.930 9.540 8.620 7.78 7.15 G5IIIw 217 0
10 2MASS J10151018+4253173 Pe* 10 15 10.1903157288 +42 53 17.362408452   14.19 13.42 12.950 12.470 ~ 19 0
11 BPS BS 16920-0017 Pe* 12 07 16.8335931408 +41 39 32.430850740   14.69 13.93 13.368 12.877 ~ 20 0
12 BPS BS 16928-0053 Pe* 12 22 28.0240827648 +34 11 31.690230360   14.38 13.54 12.886 12.339 ~ 25 0
13 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
14 HD 110184 SB* 12 40 14.0781612216 +08 31 38.057301300 10.20 9.45 8.27 8.52   KIIvw 153 0
15 HD 115444 Pe* 13 16 42.4590842616 +36 22 52.692135420   9.77 8.97 8.3 7.88 G9V 252 0
16 2MASS J13471172+2857471 Pe* 13 47 11.7175848456 +28 57 47.212244568   14.23 13.61 13.013 12.541 ~ 18 0
17 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
18 HD 126587 Pe* 14 27 00.3636631296 -22 14 38.992940592   9.88 9.60 8.75   CEMP-no 145 0
19 BPS CS 30306-0132 Pe* 15 14 18.9191634456 +07 27 02.680959780   13.62 12.73 12.421 11.948 ~ 43 0
20 M 5 GlC 15 18 33.22 +02 04 51.7     5.95     ~ 2095 0
21 HD 140283 Pe* 15 43 03.0971190219 -10 56 00.595693188 7.508 7.711 7.212 6.63 8.21 F9VkA5mA1 985 0
22 M 4 GlC 16 23 35.22 -26 31 32.7           ~ 1978 0
23 HD 186478 SB* 19 45 14.1409752672 -17 29 27.071239056   10.116 9.302 8.527 7.961 K2III 166 0
24 BPS CS 22892-0052 Pe* 22 17 01.6558764360 -16 39 27.051026544   14.03 13.20 13.06 12.19 KIIvw 472 0
25 HE 2334-0604 RG* 23 37 28.6873103640 -05 47 56.594641632   14.03 13.28 12.768 12.249 KIIvw 74 0
26 V* BX Scl SX* 23 43 54.4551676392 -28 18 34.627551660   13.82 13.56     A 43 0

To bookmark this query, right click on this link: simbad:objects in 2011ApJ...730...77H and select 'bookmark this link' or equivalent in the popup menu