HE2323-0256

taken from 2 paper(s):

/J.G.Cohen et al.(2008)/ /J.G.Cohen et al.(2013)/


J.G.Cohen et al.,ApJ, 672, 320, 2008(ADS)

New Extremely Metal-Poor Stars in the Galactic Halo


Stellar Parameters

Teff : 4915 log g : 1.70 vturb : 2.0

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
CH1...0.975.77-2.661.185.77CH
NH2...2.16+-0.306.30+-0.30-1.53+-0.302.31+-0.306.30+-0.30NH
OH1...1.967.20-1.492.357.20OH
Na I2...1.45+-0.113.98+-0.11-2.26+-0.111.58+-0.113.98+-0.11Na I
Mg I7...1.47+-0.255.22+-0.25-2.38+-0.251.46+-0.255.22+-0.25Mg I
Al I1...0.483.16-3.290.553.16Al I
Si I1...0.564.32-3.190.654.32Si I
Ca I2...0.31+-0.112.88+-0.11-3.46+-0.110.38+-0.112.88+-0.11Ca I
Ca II1...0.082.65-3.690.152.65Ca II
Sc II1...0.12-0.56-3.710.13-0.56Sc II
Ti I1...<0.46<1.66<-3.29<0.55<1.66Ti I
Ti II11...0.27+-0.061.47+-0.06-3.48+-0.060.36+-0.061.47+-0.06Ti II
V II2...0.09+-0.030.30+-0.03-3.63+-0.030.21+-0.030.30+-0.03V II
Cr I5...-0.54+-0.151.34+-0.15-4.30+-0.15-0.46+-0.151.34+-0.15Cr I
Mn I2...-0.97+-0.030.63+-0.03-4.80+-0.03-0.96+-0.030.63+-0.03Mn I
Mn II2...-0.43+-0.011.17+-0.01-4.26+-0.01-0.42+-0.011.17+-0.01Mn II
Fe I57-3.79+-0.16...3.66+-0.16-3.84+-0.16...3.66+-0.16Fe I
Fe II9-3.73+-0.180.06+-0.183.72+-0.18-3.78+-0.180.06+-0.183.72+-0.18Fe II
Co I3...0.42+-0.181.55+-0.18-3.44+-0.180.40+-0.181.55+-0.18Co I
Ni I2...-0.26+-0.042.20+-0.04-4.02+-0.04-0.18+-0.042.20+-0.04Ni I
Cu I1...-0.78-0.36-4.55-0.71-0.36Cu I
Sr II2...0.18+-0.02-0.71+-0.02-3.58+-0.020.26+-0.02-0.71+-0.02Sr II
Ba II2...-0.66+-0.23-2.32+-0.23-4.50+-0.23-0.66+-0.23-2.32+-0.23Ba II
Eu II1...<0.73<-2.55<-3.07<0.77<-2.55Eu II

Position

Observing Log

Date of Observation JD Facility Resolution S/N Exposure Time Vrad
2451764.73 -125.6+-0.1
2452158.73 -125.6+-0.1
2452544.90 KECKHIRES 46000 100 7200 -125.9+-0.1
2453312.76 KECKHIRES 46000 100 7200 -125.9+-0.1

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 : 4915+-100 log g : 1.7+-0.25 vturb : 1.9+-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
CH1...1.01...-2.761.225.67CH
NH2...2.2+-0.3...-1.63+-0.32.35+-0.36.20+-0.3NH
Na I3...1.76+-0.15...-2.09+-0.151.89+-0.154.15+-0.15Na I
Mg I7...1.39+-0.13...-2.60+-0.131.38+-0.135.00+-0.13Mg I
Al I1...0.41...-3.500.482.95Al I
Si I1...0.55...-3.340.644.17Si I
Ca I2...0.29+-0.03...-3.62+-0.030.36+-0.032.72+-0.03Ca I
Ca II1...0.02...-3.890.092.45Ca II
Sc II1...0.16...-3.820.16-0.67Sc II
Ti I1...<0.44...<-3.45<0.53<1.50Ti I
Ti II11...0.31+-0.05...-3.58+-0.050.40+-0.051.37+-0.05Ti II
V II2...0.08+-0.03...-3.78+-0.030.20+-0.030.15+-0.03V II
Cr I5...-0.53+-0.14...-4.43+-0.14-0.45+-0.141.21+-0.14Cr I
Mn I2...-0.97+-0.03...-4.94+-0.03-0.96+-0.030.49+-0.03Mn I
Mn II2...-0.48+-0.03...-4.45+-0.03-0.47+-0.030.98+-0.03Mn II
Fe I55-3.93+-0.15......-3.98+-0.15...3.52+-0.15Fe I
Fe II7-3.86+-0.150.07+-0.15...-3.91+-0.150.07+-0.153.59+-0.15Fe II
Co I3...0.44+-0.18...-3.56+-0.180.42+-0.181.43+-0.18Co I
Ni I2...-0.29+-0.03...-4.19+-0.03-0.21+-0.032.03+-0.03Ni I
Cu I1...-0.89...-4.80-0.82-0.61Cu I
Sr II2...0.25+-0.02...-3.65+-0.020.33+-0.02-0.78+-0.02Sr II
Ba II1...-0.77...-4.75-0.77-2.57Ba II
Eu II1...<0.76...<-3.18<0.80<-2.66Eu II

Binary Parameters

Vrad -125.9

Position

Observing Log

Date of Observation JD Facility Resolution S/N Exposure Time Vrad
2002-09 N/A KECKHIRES 36000 95 3600 -125.9
2004-10 N/A KECKHIRES 36000 140 7200 -125.9