The Bulletin of The Korean Astronomical Society (천문학회보)
- Volume 36 Issue 2
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- Pages.140.2-140.2
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- 2011
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- 1226-2692(pISSN)
Detection of exoplanet around evolved K giant HD 66141
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Lee, Byeong-Cheol
(Korea Astronomy and Space Science Institute) ;
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Han, In-Woo
(Korea Astronomy and Space Science Institute) ;
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Park, Myeong-Gu
(Department of Astronomy and Atmospheric Sciences, Kyungpook National University) ;
- Mkrtichian, David E. (Crimean Astrophysical Observatory) ;
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Kim, Kang-Min
(Korea Astronomy and Space Science Institute)
- Published : 2011.10.05
Abstract
We present high-resolution radial velocity (RV) measurements of K2 giant HD 66141 from December 2003 to January 2011 using the fiber-fed Bohyunsan Observatory Echelle Spectrograph (BOES) at Bohyunsan Optical Astronomy Observatory (BOAO). We find that the RV measurements for HD 66141 exhibit a periodic variation of 480 days with a semi-amplitude of 146 m/s. We do not find the correlation between RV variations and a chromospheric activity indicator (H line). The Hipparcos photometry as well as bisector velocity span (BVS) also do not show any obvious correlations with RV variations. Thus, Keplerian motion is the most likely explanation, which suggests that the RV variations arise from an orbital motion. Assuming a possible stellar mass of 1.5
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