LP831-70

taken from 9 paper(s):

/J.G.Cohen et al.(2004)/ /G.Israelian et al.(2001)/ /E.Arnone et al.(2005)/ /J.A.Rich and A. M. Boesgaard(2009)/ /J.Melendez et al.(2010)/ /D.Fabbian et al.(2009)/ /J.G.Cohen et al.(2013)/ /A.M.Boesgaard et al.(2011)/ /R.Smiljanic et al.(2021)/

J.G.Cohen et al.,ApJ, 612, 1107, 2004(ADS)

Abundances In Very Metal-Poor Dwarf Stars


Stellar Parameters

Teff : 6270 log g : 4.5 vturb : 1.6

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
Mg I5......5.33+-0.23-2.27+-0.230.64+-0.235.33+-0.23Mg I
Al I2......3.64+-0.07-2.81+-0.070.10+-0.073.64+-0.07Al I
Si I1......4.70-2.810.104.70Si I
Ca I3......3.52+-0.17-2.82+-0.170.09+-0.173.52+-0.17Ca I
Sc II3......0.62+-0.07-2.53+-0.070.38+-0.070.62+-0.07Sc II
Ti I3......<2.73+-0.18<-2.22+-0.18<0.69+-0.18<2.73+-0.18Ti I
Ti II12......2.36+-0.12-2.59+-0.120.32+-0.122.36+-0.12Ti II
Cr I4......2.46+-0.11-3.18+-0.11-0.27+-0.112.46+-0.11Cr I
Mn I2......1.80+-0.02-3.63+-0.02-0.72+-0.021.80+-0.02Mn I
Fe I43......4.59+-0.13-2.91+-0.13...4.59+-0.13Fe I
Fe II5......4.67+-0.19-2.83+-0.19...4.67+-0.19Fe II
Co I3......2.66+-0.17-2.33+-0.170.58+-0.172.66+-0.17Co I
Ni I1......3.29-2.93-0.023.29Ni I
Sr II1......-1.55-4.42-1.51-1.55Sr II
Ba II1......<-1.55<-3.73<-0.82<-1.55Ba II
Eu II1......<-0.88<-1.40<1.51<-0.88Eu II

Position

Right Ascension : 03 06 05.43 Declination : -22 19 17.9 Galactic Longitude (l) : N/A Galactic Latitude (b) : N/A

Observing Log

Date of Observation JD Facility Resolution S/N Exposure Time Vrad
2001-09 N/A KECKHIRES 45000 >100 900 N/A

G.Israelian et al.,ApJ, 551, 833, 2001(ADS)

Oxygen in the Very Early Galaxy


Stellar Parameters

Teff : 6205 log g : 4.3

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 IN/A<-1.90<1.07...<-1.61<1.36<7.08O I
FeN/A-2.97+-0.14......-2.97+-0.14...4.53+-0.14Fe

Position

Right Ascension : 03 06 05.43 Declination : -22 19 17.9 Galactic Longitude (l) : N/A Galactic Latitude (b) : N/A

Observing Log

Date of Observation JD Facility Resolution S/N Exposure Time Vrad
1998-10-06 N/A NOTSOFIN 30000 80 6600 N/A
1999-12-04 N/A KECKHIRES 60000 160 2400 N/A

E.Arnone et al.,AAP, 430, 507, 2005(ADS)

Mg abundances in metal-poor halo stars as a tracer of early Galactic mixing


Stellar Parameters

Teff : 6050 log g : 4.3+-0.2 vturb : 1.0+-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
Mg I3-2.69+-0.060.37+-0.06...-2.71+-0.060.35+-0.064.89+-0.06Mg I
Ti I1-2.46......-2.390.672.56Ti I
Cr I1-3.20......-3.17-0.112.47Cr I
Fe I9-3.06+-0.03......-3.06+-0.03...4.44+-0.03Fe I

Position

Right Ascension : 03 06 05.43 Declination : -22 19 17.9 Galactic Longitude (l) : N/A Galactic Latitude (b) : N/A

Observing Log

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

J.A.Rich et al.,ApJ, 701, 1519, 2009(ADS)

BERYLLIUM, OXYGEN, AND IRON ABUNDANCES IN EXTREMELY METAL-DEFICIENT STARS


Stellar Parameters

Teff : 5985 log g : 4.75

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
Be IIN/A......<-0.90+-0.12<-2.28+-0.12<0.78+-0.12<-0.90+-0.12Be II
OHN/A-2.45+-0.13......-2.27+-0.130.79+-0.136.42+-0.13OH
FeN/A-3.06+-0.11......-3.06+-0.11...4.44+-0.11Fe

Position

Right Ascension : 03 06 05.43 Declination : -22 19 17.9 Galactic Longitude (l) : N/A Galactic Latitude (b) : N/A

Observing Log

Date of Observation JD Facility Resolution S/N Exposure Time Vrad
2008-01-16 N/A KECKHIRES 48000 52 5400 N/A

J.Melendez et al.,AAP, 515, L3, 2010(ADS)

Observational evidence for a broken Li Spite plateau and mass-dependent Li depletion


Stellar Parameters

Teff : 6414+-50 log g : 4.49

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......2.28+-0.035-0.98+-0.0351.96+-0.0352.28+-0.035Li
FeN/A-2.94......-2.94...4.56Fe

Position

Right Ascension : 03 06 05.43 Declination : -22 19 17.9 Galactic Longitude (l) : N/A Galactic Latitude (b) : N/A

Observing Log

Date of Observation JD Facility Resolution S/N Exposure Time Vrad
N/A N/A VLT 110000 >100 N/A N/A

D.Fabbian et al.,AAP, 500, 1143, 2009(ADS)

The C/O ratio at low metallicity:constraints on early chemical evolution from observations of Galactic halo stars


Stellar Parameters

Teff : 6232 log g : 4.36

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
CN/A<-2.62...<5.77<-2.66<0.32<5.77C
ON/A<-2.13...<6.53<-2.16<0.82<6.53O
FeN/A-2.93......-2.98...4.52Fe

Position

Right Ascension : 03 06 05.43 Declination : -22 19 17.9 Galactic Longitude (l) : N/A Galactic Latitude (b) : N/A

Observing Log

Date of Observation JD Facility Resolution S/N Exposure Time Vrad
2003-12 N/A MIKELCO 60000 40-380 N/A N/A

J.G.Cohen et al.,ApJ, 778, 56, 2013(ADS)

Normal and Outlying Populations of the Milky Way Stellar Halo at [Fe/H] <-2


Stellar Parameters

Teff : 6270+-100 log g : 4.4+-0.25 vturb : 1.6+-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
Mg I5...0.53+-0.16...-2.39+-0.160.52+-0.165.21+-0.16Mg I
Al I2...0.03+-0.07...-2.81+-0.070.10+-0.073.64+-0.07Al I
Si I1...0.01...-2.810.104.70Si I
Ca I3...0.02+-0.17...-2.82+-0.170.09+-0.173.52+-0.17Ca I
Sc II3...0.39+-0.07...-2.52+-0.070.39+-0.070.63+-0.07Sc II
Ti I3...<0.6+-0.18...<-2.22+-0.18<0.69+-0.18<2.73+-0.18Ti I
Ti II12...0.23+-0.12...-2.59+-0.120.32+-0.122.36+-0.12Ti II
Cr I4...-0.35+-0.11...-3.18+-0.11-0.27+-0.112.46+-0.11Cr I
Mn I2...-0.73+-0.02...-3.63+-0.02-0.72+-0.021.80+-0.02Mn I
Fe IN/A-2.86+-0.13......-2.91+-0.13...4.59+-0.13Fe I
Fe II5...0.08+-0.19...-2.83+-0.190.08+-0.194.67+-0.19Fe II
Co I3...0.6+-0.17...-2.33+-0.170.58+-0.172.66+-0.17Co I
Ni I1...-0.1...-2.93-0.023.29Ni I
Sr II1...-1.59...-4.42-1.51-1.55Sr II
Ba II1...<-0.82...<-3.73<-0.82<-1.55Ba II
Eu II1...<1.48...<-1.39<1.52<-0.87Eu II

Binary Parameters

Vrad -48.2

Position

Observing Log

Date of Observation JD Facility Resolution S/N Exposure Time Vrad
2001-09 N/A KECKHIRES 36000 100 900 -48.2

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 : 6005+-100 log g : 3.40+-0.2 vturb : 1.47+-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...<-0.53+-0.15<-1.10+-0.12<-2.48+-0.12<0.57+-0.15<-1.10+-0.12Be
ON/A-1.85+-0.22+1.20+-0.24...-1.91+-0.221.14+-0.246.78+-0.22O
MgN/A-2.50+-0.07......-2.52+-0.070.53+-0.075.08+-0.07Mg
TiN/A-2.53+-0.09......-2.46+-0.090.59+-0.092.49+-0.09Ti
FeN/A-3.05+-0.09......-3.05+-0.09...4.45+-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
N/A KECKHIRES 42000 N/A N/A N/A

R.Smiljanic et al.,AAP, 646, A70, 2021(ADS)

Inhomogeneity in the early Galactic chemical enrichment exposed by beryllium abundances in extremely metal-poor stars


Stellar Parameters

Teff : 6350+-125 log g : 4.42+-0.05

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......<-13.4<-14.78<-11.78<-13.4Be
FeN/A-3.00+-0.08......-3.00+-0.08...4.50+-0.08Fe

Position

Right Ascension : 03 06 05.44 Declination : -22 19 17.94 Galactic Longitude (l) : N/A Galactic Latitude (b) : N/A

Observing Log

Date of Observation JD Facility Resolution S/N Exposure Time Vrad
N/A N/A VLT N/A 90 N/A N/A