34 citations · 83 across the 6 of their papers we have counts for
6 papers
A detailed study of Lithium in 107 CHEPS dwarf stars
Ya. V. Pavlenko, J. S. Jenkins, O. M. Ivanyuk +4
We report results from lithium abundance determinations using high resolution spectral analysis of the 107 metal-rich stars from the Calan-Hertfordshire Extrasolar Planet Search pr…
Probing M subdwarf metallicity with an esdK5+esdM5.5 binary
Ya. V. Pavlenko, Z. H. Zhang, M. C. Gálvez-Ortiz +2
We present a spectral analysis of the binary G 224-58 AB that consists of the coolest M extreme subdwarf (esdM5.5) and a brighter primary (esdK5). This binary may serve as a benchm…
Abundances in the atmosphere of the metal-rich planet-host star HD 77338
I. O. Kushniruk, Ya. V. Pavlenko, J. S. Jenkins +1
Abundances of Fe, Si, Ni, Ti, Na, Mg, Cu, Zn, Mn, Cr and Ca in the atmosphere of the K-dwarf HD 77338 are determined and discussed. HD 77338 hosts a hot Uranus-like planet and is c…
Vsini-s for late-type stars from spectral synthesis in K-band region
Yu. Lyubchik, H. R. A. Jones, Ya. V. Pavlenko +2
We analyse medium-resolution spectra (R\sim 18000) of 19 late type dwarfs in order to determine vsini-s using synthetic rather than observational template spectra. For this purpose…
The electronic bands of CrD, CrH, MgD and MgH: application to the "deuterium test"
Ya. V. Pavlenko, G. J. Harris, J. Tennyson +4
We compute opacities for the electronic molecular band systems A 6Sigma+ -- X 6Sigma+ of CrH and CrD, and A 2Pi -- X 2Sigma+ of MgH and MgD. The opacities are computed by making us…
Carbon Monoxide bands in M dwarfs
Yakiv V. Pavlenko, Hugh R. A. Jones
We compare the observational and theoretical spectra of the = 2 CO bands in a range of M dwarfs. We investigate the dependence of theoretical spectra on effective temperatures…