천문학회보 (The Bulletin of The Korean Astronomical Society)
- 제42권1호
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- Pages.47.2-47.2
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- 2017
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- 1226-2692(pISSN)
Measurement of proper motion and annual parallax with maser emission
- Kim, Dong-Jin (Department of Astronomy, Yonsei University) ;
- Cho, Se-Hyung (Korea Astronomy and Space Science Institute) ;
- Yun, Young-Joo (Korea Astronomy and Space Science Institute) ;
- Choi, Yoon Kyung (Korea Astronomy and Space Science Institute) ;
- Yoon, Dong-Hwan (Korea Astronomy and Space Science Institute) ;
- Yoon, Suk-Jin (Department of Astronomy, Yonsei University)
- 발행 : 2017.04.10
초록
We present the results of astrometric observations using water masers around a semi-regular variable star R Crt. The observations were carried out for two years with the Korean VLBI Network (KVN). The absolute positions of the water masers from R Crt are successfully obtained at 10 epochs in total. By tracking the positions of the water maser emission, we directly measured the annual parallax and distance of R Crt. The measured distance to R Crt enables us to estimate the actual 3D velocity of water masers around R Crt. Our research suggests the possibility of performing astrometric studies with the KVN. As a next step, we are going to enhance the astrometric accuracy by observing SiO masers.
키워드