The Bulletin of The Korean Astronomical Society (천문학회보)
- Volume 42 Issue 1
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- Pages.44.4-45
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- 2017
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- 1226-2692(pISSN)
A KMTNet search for RR Lyrae Stars in the Crater II Ultra-Faint Dwarf Galaxy
- Joo, Seok-Joo (Korea Astronomy and Space Science Institute) ;
- Sung, Eon-Chang (Korea Astronomy and Space Science Institute) ;
- Kyeong, Jaemann (Korea Astronomy and Space Science Institute) ;
- Han, Sang-Il (Korea Astronomy and Space Science Institute) ;
- Yang, Soung-Chul (Korea Astronomy and Space Science Institute) ;
- Jeong, Hyunjin (Korea Astronomy and Space Science Institute)
- Published : 2017.04.10
Abstract
We report the first detection of RR Lyrae variable stars in the Crater II dwarf galaxy, a recently discovered ultra-faint satellite of the Milky Way. Based on B, V time series photometry obtained with the Korea Microlensing Telescope Network (KMTNet) at CTIO, Chile, we have identified ~45 fundamental-mode (ab-type) and ~2 first-overtone (c-type) RR Lyrae stars by adopting template light-curve fitting method. Our preliminary analysis suggests an Oosterhoff-intermediate classification of this galaxy from the mean period of the RRab stars, <
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