HE0457-1805

taken from 1 paper(s):

/J.Shejeelammal and A. Goswami(2022)/

J.Shejeelammal et al.,ApJ, 934, 110, 2022(ADS)

Spectroscopic Study of Four Metal-poor Carbon Stars from the Hamburg/ESO Survey: On Confirming the Low-mass Nature of Their Companions


Stellar Parameters

Teff : 4435+-100 log g : 0.7+-0.2 vturb : 1.97+-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
CN/A-0.191.808.25-0.181.808.25C
N3-0.311.677.52+-0.07-0.311.677.52+-0.07N
Na I30.222.26.46+-0.060.222.206.46+-0.06Na I
Mg I2-0.661.326.94+-0.14-0.661.326.94+-0.14Mg I
Ca I7-1.130.855.21+-0.12-1.130.855.21+-0.12Ca I
Sc II1-1.30.681.85-1.300.681.85Sc II
Ti I6-1.120.863.83+-0.17-1.120.863.83+-0.17Ti I
Ti II5-1.550.433.40+-0.14-1.550.433.40+-0.14Ti II
V I2-1.20.782.73-1.200.782.73V I
Cr I4-0.921.064.72+-0.10-0.921.064.72+-0.10Cr I
Cr II2-1.060.924.58+-0.04-1.060.924.58+-0.04Cr II
Mn I2-10.984.43-1.000.984.43Mn I
Fe I11-1.98...5.52+-0.13-1.98...5.52+-0.13Fe I
Fe II4-1.98...5.52+-0.12-1.98...5.52+-0.12Fe II
Co I1-1.410.573.58-1.410.573.58Co I
Ni I7-0.921.065.30+-0.08-0.921.065.30+-0.08Ni I
Cu I1-1.98...2.21-1.980.002.21Cu I
Zn I1-1.50.483.1-1.460.523.1Zn I
Rb I1-0.571.411.95-0.411.571.95Rb I
Y II4-0.031.952.18+-0.20-0.031.952.18+-0.20Y II
Zr I10.452.433.030.452.433.03Zr I
Zr II10.052.032.630.052.032.63Zr II
La II30.292.271.39+-0.020.292.271.39+-0.02La II
Ce II60.372.351.95+-0.150.372.351.95+-0.15Ce II
Pr II60.582.561.30+-0.110.582.561.30+-0.11Pr II
Nd II90.392.371.81+-0.110.392.371.81+-0.11Nd II
Sm II70.432.411.39+-0.110.432.411.39+-0.11Sm II
Eu II1-0.721.26-0.2-0.721.26-0.2Eu II

Isotopic Ratio

12C/13C 23+-4

Binary Parameters

Binarity Positive
Vrad 62.83+-0.02

Position

Right Ascension : 04 59 43.56 Declination : -18 01 11.99 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 HERMES 86000 15.82/55.48/89.05 N/A 62.83+-0.02