Journal of The Korean Astronomical Society (천문학회지)

The Korean Astronomical Society (한국천문학회)
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THE ATMOSPHERE PARAMETERS AND THE LINE PROFILE VARIATIONS OF ρ PUPPIS

  • Yushchenko, A.V. (Odessa Astronomical Observatory, Odessa National University) ;
  • Dorokhova, T.N. (Odessa Astronomical Observatory, Odessa National University) ;
  • Gopka, V.F. (Odessa Astronomical Observatory, Odessa National University) ;
  • Kim, Chul-Hee (Division of Science Education, Institute of Fusion Science, Chonbuk National University) ;
  • Lee, B.C. (Korea Astronomy and Space Science Institute) ;
  • Yushchenko, V.A. (Dep. of Astronomy, Odessa National University) ;
  • Doikov, D.N. (Dep. Of Common Science, Odessa National Maritime University)
  • Received : 2010.04.19
  • Accepted : 2010.05.20
  • Published : 2010.06.30
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Abstract

We investigate ${\rho}$ Pup using the high resolution spectral observations taken from the VLT archive and observations at a 1.8m-Korean telescope with BOES spectrograph. The atmospheric parameters are determined using the iron-line abundance analysis. We derive an effective temperature value of $T_{eff}=6890{\pm}250K$, surface gravity of log g=$3.28{\pm}0.3$ dex, microturbulent velocity of ${\upsilon}_{micro}=4.1{\pm}0.4km\;s^{-1}$, and the iron abundance of log N=$7.82{\pm}0.15$. The projected rotational velocity of the star is close to ${\upsilon}$ sin i=3.5km $s^{-1}$. Asymmetric line profiles in the observed spectra and variation of this asymmetry with time show that both strong radial pulsation and weak non-radial pulsations are present in ${\rho}$ Pup.

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