G20-24

taken from 5 paper(s):

/P.E.Nissen et al.(2002)/ /M.Asplund et al.(2006)/ /K.F.Tan et al.(2009)/ /C.J.Hansen et al.(2012)/ /A.M.Boesgaard et al.(2011)/

P.E.Nissen et al.,AAP, 390, 235, 2002(ADS)

O/Fe in metal-poor main sequence and subgiant stars


Stellar Parameters

Teff : 6440 log g : 4.30 vturb : 1.5

Chemical Abundances

Original Data Converted Data Asplund et al. (2009)
Element Nline [X/H] [X/Fe] log-e [X/H] [X/Fe] log-e Element
[O I]N/A...0.38...-1.350.407.34[O I]
FeN/A-1.78......-1.75...5.75Fe

Position

Observing Log

Date of Observation JD Facility Resolution S/N Exposure Time Vrad
2000-04 N/A VLT 55000 300-400 N/A N/A

M.Asplund et al.,ApJ, 644, 229, 2006(ADS)

Lithium Isotopic Abundances in Metal-poor Halo Stars


Stellar Parameters

Teff : 6247 log g : 3.98 vturb : 1.5

Chemical Abundances

Original Data Converted Data Asplund et al. (2009)
Element Nline [X/H] [X/Fe] log-e [X/H] [X/Fe] log-e Element
LiN/A......2.21+-0.01-1.05+-0.010.84+-0.012.21+-0.01Li
ON/A-1.35......-1.300.597.39O
FeN/A-1.89......-1.89...5.61Fe

Isotopic Ratio

6Li/7Li 0.070+-0.017

Binary Parameters

Vrad 34.5

Position

Observing Log

Date of Observation JD Facility Resolution S/N Exposure Time Vrad
2000-07-24-0219 N/A VLT 120000 430 90 34.2
2000-07-25-0247 N/A VLT 120000 420 90 34.5

K.F.Tan et al.,MNRAS, 392, 205, 2009(ADS)

Beryllium abundances in metal-poor stars


Stellar Parameters

Teff : 6190+-80 log g : 3.90+-0.15 vturb : 1.5+-0.2

Chemical Abundances

Original Data Converted Data Asplund et al. (2009)
Element Nline [X/H] [X/Fe] log-e [X/H] [X/Fe] log-e Element
LiN/A......2.19-1.070.842.19Li
BeN/A......-0.72+-0.17-2.10+-0.17-0.19+-0.17-0.72+-0.17Be
ON/A-1.19......-1.110.807.58O
FeN/A-1.92......-1.91...5.59Fe

Position

Observing Log

Date of Observation JD Facility Resolution S/N Exposure Time Vrad
2008-04-10 N/A VLT 48000 N/A N/A N/A

C.J.Hansen et al.,AAP, 545, A31, 2012(ADS)

Silver and palladium help unveil the nature of a second r-process


Stellar Parameters

Teff : 6482+-100 log g : 4.47+-0.25 vturb : 1.5+-0.15

Chemical Abundances

Original Data Converted Data Asplund et al. (2009)
Element Nline [X/H] [X/Fe] log-e [X/H] [X/Fe] log-e Element
FeN/A-1.90+-0.15......-1.90+-0.15...5.60+-0.15Fe
SrN/A...0.22+-0.11...-1.68+-0.110.22+-0.111.19+-0.11Sr
YN/A...0.17+-0.12...-1.73+-0.120.17+-0.120.48+-0.12Y
ZrN/A...0.56+-0.15...-1.34+-0.150.56+-0.151.24+-0.15Zr
PdN/A...0.77+-0.27...-1.13+-0.270.77+-0.270.44+-0.27Pd
BaN/A...0.32+-0.14...-1.58+-0.140.32+-0.140.60+-0.14Ba

Position

Observing Log

Date of Observation JD Facility Resolution S/N Exposure Time Vrad
N/A VLT 40000 >100 N/A N/A

A.M.Boesgaard et al.,ApJ, 743, 140, 2011(ADS)

Beryllium and Alpha-element Abundances in a Large Sample of Metal-poor Stars


Stellar Parameters

Teff : 6222+-100 log g : 4.07+-0.2 vturb : 1.14+-0.2

Chemical Abundances

Original Data Converted Data Asplund et al. (2009)
Element Nline [X/H] [X/Fe] log-e [X/H] [X/Fe] log-e Element
BeN/A...-0.10+-0.15-0.57+-0.12-1.95+-0.12-0.06+-0.15-0.57+-0.12Be
ON/A-1.41+-0.22+0.48+-0.24...-1.47+-0.220.42+-0.247.22+-0.22O
MgN/A-1.61+-0.07......-1.63+-0.070.26+-0.075.97+-0.07Mg
TiN/A-1.42+-0.09......-1.35+-0.090.54+-0.093.60+-0.09Ti
FeN/A-1.89+-0.09......-1.89+-0.09...5.61+-0.09Fe

Position

Right Ascension : Declination : Galactic Longitude (l) : N/A Galactic Latitude (b) : N/A

Observing Log

Date of Observation JD Facility Resolution S/N Exposure Time Vrad
2007-06-10 N/A KECKHIRES 42000 110 3600 N/A