천문학회보 (The Bulletin of The Korean Astronomical Society)
- 제40권2호
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- Pages.35.2-35.2
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- 2015
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- 1226-2692(pISSN)
Multi-band imaging of the H2O and SiO masers around the late-type stars using KVN
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Yun, Youngjoo
(Korea Astronomy and Space Science Institute) ;
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Cho, Se-Hyung
(Korea Astronomy and Space Science Institute) ;
- Dodson, Richard (International Centre for Radio Astronomy Research, M468, The University of Western Australia) ;
- Rioja, Maria J. (International Centre for Radio Astronomy Research, M468, The University of Western Australia)
- 발행 : 2015.10.15
초록
We present the results of simultaneous observations of the H2O and SiO masers emitted from the circumstellar envelopes (CSEs) of the late-type stars. These observations have been carried out at the four frequency bands (K, Q, W and D bands) using KVN to apply the source frequency phase referencing (SFPR) analysis to the maser lines. We obtain the relative positions between the H2O and the SiO maser spots by using the SFPR method, which are very important to study the physical links between the inner and the outer parts of the CSEs of the late-type stars. The relative positions between the SiO maser spots of the different transitions are also obtained very accurately, which are very crucial to investigate the pumping mechanism of the SiO maser lines. From our results, the capability of the simultaneous multi-band observation of KVN is proved to be powerful to study the complicated physical environments of the CSEs and the stellar evolution of the late-type stars.
키워드