2MASSJ202123.89-515742.7

  • SMSSJ202123.89-515742.8 in H.R.Jacobson+,ApJ, 807, 171, 2015

    • taken from 2 paper(s):

    /K.C.Schlaufman and A. R. Casey(2014)/ /H.R.Jacobson et al.(2015)/

    K.C.Schlaufman et al.,ApJ, 797, 13, 2014(ADS)

    The Best and Brightest Metal-poor Stars


    Stellar Parameters

    Teff : 4608+-100 log g : 0.86+-0.2 vturb : 2.95+-0.1

    Binary Parameters

    Vrad 277.8

    Position

    Right Ascension : 20 21 23.89 Declination : -51 57 42.8 Galactic Longitude (l) : N/A Galactic Latitude (b) : N/A

    Observing Log

    Date of Observation JD Facility Resolution S/N Exposure Time Vrad
    2014-06-21 N/A MIKELCO 41000 50 N/A 277.8
    2014-07-08 N/A MIKELCO 41000 50 N/A 277.8

    H.R.Jacobson et al.,ApJ, 807, 171, 2015(ADS)

    High-Resolution Spectroscopic Study of Extremely Metal-Poor Star Candidates from the SkyMapper Survey


    Stellar Parameters

    Teff : 4900 log g : 1.70 vturb : 2.20

    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
    C2-2.82-0.215.61-2.82-0.215.61C
    Na2-2.480.133.76-2.480.133.76Na
    Mg4-2.230.385.37-2.230.385.37Mg
    Al2-3.03-0.423.42-3.03-0.423.42Al
    Si2-2.180.435.33-2.180.435.33Si
    Ca10-2.420.193.92-2.420.193.92Ca
    Sc1-3.17-0.56-0.02-3.17-0.56-0.02Sc
    Ti I7-2.450.162.50-2.450.162.50Ti I
    Ti II18-2.260.352.69-2.260.352.69Ti II
    Cr I5-3.08-0.472.56-3.08-0.472.56Cr I
    Mn3-3.06-0.452.37-3.06-0.452.37Mn
    Fe I82-2.61-0.004.89-2.61-0.004.89Fe I
    Fe II7-2.610.004.89-2.610.004.89Fe II
    Co1-2.240.372.75-2.240.372.75Co
    Ni2-2.270.333.95-2.270.343.95Ni
    Sr2-3.32-0.71-0.45-3.32-0.71-0.45Sr
    Ba2-3.65-1.04-1.46-3.64-1.03-1.46Ba
    Eu1<-2.42<0.19<-1.90<-2.42<0.19<-1.90Eu

    Binary Parameters

    Vrad 278.2

    Position

    Right Ascension : 20 21 23.89 Declination : -51 57 42.8 Galactic Longitude (l) : N/A Galactic Latitude (b) : N/A

    Observing Log

    Date of Observation JD Facility Resolution S/N Exposure Time Vrad
    2012-09-08 N/A MIKELCO 28000 15-25 2400 278.2