2002ApJ...575..474M

Query : 2002ApJ...575..474M

2002ApJ...575..474M - Astrophys. J., 575, 474-483 (2002/August-2)

Keck NIRSPEC infrared OH lines: oxygen abundances in metal-poor stars down to [Fe/H] = -2.9.

MELENDEZ J. and BARBUY B.

Abstract (from CDS):

Infrared OH lines at 1.5-1.7 µm in the H band were obtained with the NIRSPEC high-resolution spectrograph at the 10 m Keck Telescope for a sample of seven metal-poor stars. Detailed analyses have been carried out, based on optical high-resolution data obtained with the Fiber-fed Extended Range Optical Spectrograph at ESO. Stellar parameters were derived by adopting infrared flux method effective temperatures, trigonometric and/or evolutionary gravities, and metallicities from Fe II lines. We obtain that the sample stars with metallicities [Fe/H]←2.2 show a mean oxygen abundance [O/Fe]~0.54 for a solar oxygen abundance of ε(O)=8.87, or [O/Fe]~0.64 if ε(O)=8.77 is assumed.

Abstract Copyright: ∼

Journal keyword(s): Infrared: Stars - Stars: Abundances - Stars: Population II

Simbad objects: 22

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Number of rows : 22
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2024 		#notes
1 HD 2665 PM* 00 30 45.4469338728 +57 03 53.628989292 8.66 8.51 7.72     G5IIIw 177 0
2 HD 2796 Pe* 00 31 16.9147531152 -16 47 40.790991624 9.58 9.28 8.50 8.14 8.67 Fw 193 0
3 HD 6268 Pe* 01 03 18.1716378504 -27 52 49.953768852   9.725 9.046 8.601   F/Gw 153 0
4 * mu. Cas SB* 01 08 16.3029454473 +54 55 12.561201263 5.93 5.86 5.17 4.55 4.13 G5Vb 571 1
5 HD 6755 SB* 01 09 43.0577179701 +61 32 50.264076956 8.48 8.40   7.3   G5 240 0
6 BD-18 271 Pe* 01 37 18.8808986376 -17 29 03.907703472   10.93 9.77     KIIvw 64 0
7 HD 21581 Pe* 03 28 54.4844652624 -00 25 03.107565696 9.75 9.54 8.71     G8w 127 0
8 HD 25329 PM* 04 03 14.9979736362 +35 16 23.805785323 9.75 9.37 8.50 7.75 7.23 K1VbFe-2 366 0
9 HD 26297 Pe* 04 09 03.4178692512 -15 53 27.056905800   8.55 7.47 7.09   G5/6IVw 158 0
10 BD+06 648 Pe* 04 13 13.1126763288 +06 36 01.768985496   10.27 9.09 8.58   K0 106 0
11 V* HP Eri LP* 04 38 55.7330378304 -13 20 48.133934448 10.91 9.72 8.33     G8/K0IIIwF7 132 0
12 HD 37828 Pe* 05 40 54.6448450584 -11 12 00.189470088   7.988 6.869     G8III 101 0
13 HD 103095 Pe* 11 52 58.7673387755 +37 43 07.254113125 7.38 7.20 6.45 5.80 5.35 K1V_Fe-1.5 802 1
14 HD 110184 SB* 12 40 14.0781612216 +08 31 38.057301300 10.20 9.45 8.27 8.52   KIIvw 141 0
15 HD 122956 Pe* 14 05 13.0244442888 -14 51 25.455804480   8.18 7.3 6.88   G6IV/VwF6 156 0
16 HD 134440 PM* 15 10 12.9678589986 -16 27 46.522175847 10.69 10.217 9.426 8.913 8.441 K2V 281 0
17 V* V2564 Oph LP? 18 04 40.0713763656 +03 46 44.716990584 9.53 8.59 7.30 6.24 5.43 F6/7V 259 0
18 HD 187111 Pe* 19 48 39.5744746680 -12 07 19.738101036   8.92 7.75     G8wF8III/IV 142 0
19 BD-18 5550 Pe* 19 58 49.7371417608 -18 12 11.140126164 10.18 10.03 9.35 9.04 8.74 CEMP-no 173 0
20 HD 206739 PM* 21 44 23.9461069656 -11 46 22.843385220   9.45 8.60 8.14   G5V 79 0
21 HD 216143 Pe* 22 50 31.0883724288 -06 54 49.554279360   8.78 7.81 7.44   G2/3(IV)(we) 143 0
22 HD 221170 Pe* 23 29 28.8087143040 +30 25 57.849303180 9.43 8.74 7.66     CEMP-r 289 0

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