HE0054-2123

taken from 2 paper(s):

/J.G.Cohen et al.(2004)/ /J.G.Cohen et al.(2013)/

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

Abundances In Very Metal-Poor Dwarf Stars


Stellar Parameters

Teff : 6470 log g : 4.4 vturb : 1.7

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......5.36+-0.14-2.24+-0.140.32+-0.145.36+-0.14Mg I
Al I2......3.79+-0.12-2.66+-0.12-0.10+-0.123.79+-0.12Al I
Si I1......5.11-2.400.165.11Si I
Ca I7......4.17+-0.12-2.17+-0.120.39+-0.124.17+-0.12Ca I
Sc II3......0.92+-0.10-2.23+-0.100.33+-0.100.92+-0.10Sc II
Ti I6......3.05+-0.11-1.90+-0.110.66+-0.113.05+-0.11Ti I
Ti II13......2.99+-0.12-1.96+-0.120.60+-0.122.99+-0.12Ti II
Cr I4......3.01+-0.09-2.63+-0.09-0.07+-0.093.01+-0.09Cr I
Mn I2......2.05+-0.14-3.38+-0.14-0.82+-0.142.05+-0.14Mn I
Fe I56......4.94+-0.18-2.56+-0.18...4.94+-0.18Fe I
Fe II5......4.90+-0.10-2.60+-0.10...4.90+-0.10Fe II
Co I2......2.63+-0.02-2.36+-0.020.20+-0.022.63+-0.02Co I
Ni I1......3.79-2.430.133.79Ni I
Zn I1......2.61-1.950.612.61Zn I
Sr II2......0.12+-0.05-2.75+-0.05-0.19+-0.050.12+-0.05Sr II
Ba II2......-0.64+-0.09-2.82+-0.09-0.26+-0.09-0.64+-0.09Ba II
Nd II1......<1.11<-0.31<2.25<1.11Nd II
Eu II1......<-0.45<-0.97<1.59<-0.45Eu II

Position

Right Ascension : 00 56 53.20 Declination : -21 07 29.0 Galactic Longitude (l) : N/A Galactic Latitude (b) : N/A

Observing Log

Date of Observation JD Facility Resolution S/N Exposure Time Vrad
2002-09 N/A KECKHIRES 34000 100 8400 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 : 6470+-100 log g : 4.4+-0.25 vturb : 1.7+-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...0.23+-0.1...-2.34+-0.10.22+-0.15.26+-0.1Mg I
Al I2...-0.17+-0.12...-2.66+-0.12-0.10+-0.123.79+-0.12Al I
Si I1...0.02...-2.450.115.06Si I
Ca I7...0.32+-0.12...-2.17+-0.120.39+-0.124.17+-0.12Ca I
Sc II3...0.33+-0.1...-2.23+-0.10.33+-0.10.92+-0.1Sc II
Ti I6...0.57+-0.11...-1.90+-0.110.66+-0.113.05+-0.11Ti I
Ti II13...0.51+-0.12...-1.96+-0.120.60+-0.122.99+-0.12Ti II
Cr I4...-0.15+-0.09...-2.63+-0.09-0.07+-0.093.01+-0.09Cr I
Mn I2...-0.83+-0.14...-3.38+-0.14-0.82+-0.142.05+-0.14Mn I
Fe IN/A-2.51+-0.16......-2.56+-0.16...4.94+-0.16Fe I
Fe II5-2.55+-0.1-0.04+-0.1...-2.60+-0.1-0.04+-0.14.90+-0.1Fe II
Co I2...0.22+-0.02...-2.36+-0.020.20+-0.022.63+-0.02Co I
Ni I1...0.05...-2.430.133.79Ni I
Zn I1...0.52...-1.950.612.61Zn I
Sr II2...-0.27+-0.05...-2.75+-0.05-0.19+-0.050.12+-0.05Sr II
Ba II1...-0.2...-2.76-0.20-0.58Ba II
Nd II1...<1.84...<-0.59<1.97<0.83Nd II
Eu II1...<1.55...<-0.97<1.59<-0.45Eu II

Binary Parameters

Vrad 61.2

Position

Right Ascension : 00 56 53.20 Declination : -21 07 29.0 Galactic Longitude (l) : N/A Galactic Latitude (b) : N/A

Observing Log

Date of Observation JD Facility Resolution S/N Exposure Time Vrad
2002-09 N/A KECKHIRES 36000 100 8400 61.2