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THE ATMOSPHERE PARAMETERS AND THE LINE PROFILE VARIATIONS OF ρ PUPPIS
Yushchenko, A.V.,Dorokhova, T.N.,Gopka, V.F.,Kim, Chul-Hee,Lee, B.C.,Yushchenko, V.A.,Doikov, D.N. The Korean Astronomical Society 2010 Journal of The Korean Astronomical Society Vol.43 No.3
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.