• Title/Summary/Keyword: EX Leo

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RADIAL VELOCITY ESTIMATION OF EX Leo USING BF ALGORITHM (BF 방법을 이용한 EX Leo의 시선속도 추정)

  • Kang, Dong-Il;Park, Hong-Suh;Han, In-Woo;Kim, Kang-Min
    • Publications of The Korean Astronomical Society
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    • v.22 no.2
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    • pp.35-41
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    • 2007
  • We present the result of radial velocity observation of a W UMa type binary star EX Leo. We observed the star on February 16, 2003, using Long-Slit spectrograph of BOAO(Bohyunsan Optical Astronomical Observatory). Since the spectral lines are broad due to its fast rotation, it is difficult to distinguish two radial velocities from cross correlation function. Instead of cross correlation function, we used broadening function to develop our own code which estimate the radial velocity of the broadened line spectra. With our own code, radial velocities of primary and secondary stars are derived simultaneously. From the radial velocity curve fit, we obtained $K_1=50.24{\pm}8.29km/s$ and $K_2=254.05{\pm}20.984km/s$ respectively.