Browsing by Author "9d7b88e5-dfb8-405a-aea0-6f2d1e11e9d3"

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    • A detailed study of lithium in 107 CHEPS dwarf stars 
      Pavlenko, Ya. V.; Jenkins, James Stewart; Ivanyuk, O. M.; Jones, H. R. A.; Kaminsky, B. M.; Lyubchik, Yu. P.; Yakovina, L. A. (EDP Sciences, 2018)
      Context. 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 programme. Aims. We aim to set ...
    • Surprisingly different starspot distributions on the near equal-mass equal-rotation-rate stars in the M ... 
      Barnes, J. R.; Jeffers, S. V.; Haswell, C. A; Jones, H.R.A.; Shulyak, D.; Pavlenko, Ya. V.; Jenkins, James Stewart (Oxford University, 2017)
      We aim to understand how stellar parameters such as mass and rotation impact the distribution of star-spots on the stellar surface. To this purpose, we have used Doppler imaging to reconstruct the surface brightness ...
    • The metal-rich abundance pattern - spectroscopic properties and abundances for 107 main-sequence stars 
      Ivanyuk, O. M.; Jenkins, James Stewart; Pavlenko, Ya. V.; Jones, H. R. A.; Pinfield, D. J. (Oxford university press, 2017)
      We report results from the high-resolution spectral analysis of the 107 metal-rich (mostly [Fe/H] >= 7.67 dex) target stars from the Calan Hertfordshire Extrasolar Planet Search programme observed with HARPS. Using our ...