HE1218-1828

taken from 1 paper(s):

/T.Hansen et al.(2015)/

T.Hansen et al.,ApJ, 807, 173, 2015 (A0316,ADS)

An Elemental Assay of Very, Extremely, and Ultra-metal-poor Stars


Stellar Parameters

Teff : 5900+-100 log g : 3.5+-0.3 vturb : 1.8+-0.3

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
LiN/A......+1.94+-0.17-1.32+-0.172.11+-0.17+1.94+-0.17Li
CN/A...<+1.27...<-2.16<1.27<6.27C
NN/A...<+1.70...<-1.73<1.70<6.10N
ON/A...<+3.30...<-0.13<3.30<8.56O
NaN/A...-0.33+-0.16...-3.76+-0.16-0.33+-0.162.48+-0.16Na
MgN/A...+0.32+-0.17...-3.11+-0.170.32+-0.174.49+-0.17Mg
AlN/A...-0.57+-0.22...-4.00+-0.22-0.57+-0.222.45+-0.22Al
SiN/A...+0.06+-0.18...-3.37+-0.180.06+-0.184.14+-0.18Si
CaN/A...+0.60+-0.17...-2.83+-0.170.60+-0.173.51+-0.17Ca
ScN/A...+0.12+-0.20...-3.31+-0.200.12+-0.20-0.16+-0.20Sc
TiN/A...+0.25+-0.16...-3.18+-0.160.25+-0.161.77+-0.16Ti
VN/A...<+1.30...<-2.13<1.30<1.80V
CrN/A...-0.28+-0.19...-3.71+-0.19-0.28+-0.191.93+-0.19Cr
MnN/A...-0.65+-0.22...-4.08+-0.22-0.65+-0.221.35+-0.22Mn
FeN/A-3.43+-0.20......-3.43+-0.20...4.07+-0.20Fe
CoN/A...+0.38+-0.21...-3.05+-0.210.38+-0.211.94+-0.21Co
NiN/A...-0.06+-0.19...-3.49+-0.19-0.06+-0.192.73+-0.19Ni
ZnN/A...<+1.50...<-1.93<1.50<2.63Zn
SrN/A...-0.51+-0.20...-3.94+-0.20-0.51+-0.20-1.07+-0.20Sr
BaN/A...<-0.52...<-3.95<-0.52<-1.77Ba
EuN/A...<+2.00...<-1.43<2.00<-0.91Eu

Binary Parameters

Vrad 147.1+-0.5

Observing Log

Date of Observation JD Facility Resolution S/N Exposure Time Vrad
2006-04-21 N/A VLT 45000 4-33 6000 147.1+-0.5
2006-04-21 N/A VLT 45000 N/A 3000 N/A
Galactic Longitude (l) : N/A Galactic Latitude (b) : N/A Declination : Right Ascension :