The Bulletin of The Korean Astronomical Society (천문학회보)
- Volume 40 Issue 2
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- Pages.43.3-44
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- 2015
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- 1226-2692(pISSN)
Measuring AGN Core-shift Effect by Extended KVN with Global Baselines
- Jung, Taehyun (Korea Astronomy & Space Science Institute) ;
- Dodson, Richard (International Centre for Radio Astronomy Research) ;
- Han, Seog-Tae (Korea Astronomy & Space Science Institute) ;
- Byun, Do-Young (Korea Astronomy & Space Science Institute) ;
- Sohn, Bong Won (Korea Astronomy & Space Science Institute) ;
- Rioja, Maria J. (International Centre for Radio Astronomy Research) ;
- Honma, Mareki (Mizusawa VLBI Observatory, NAOJ) ;
- Stevens, Jamie (Australia Telescope National Facility) ;
- de Vincente, Pablo (Observatorio Astronomico Nacional (IGN))
- Published : 2015.10.15
Abstract
Very Long Baseline Interferometry (VLBI) at millimeter wavelengths results in the highest angular resolutions achieved in astronomy and has a unique access to emission regions that are inaccessible with any other approach or at longer wavelengths. The simultaneous multi-frequency VLBI system in the Korean VLBI Network (KVN) is considered one of the most effective systems for compensating the atmospheric phase fluctuations, which is particularly bothersome at mm-VLBI. We have been demonstrating its performance and uniqueness at mm-VLBI observations. As a results, international VLBI partners from Japan, China, Australia and EU have expressed their interest on the KVN style simultaneous multi-frequency system. In this talk, we will report the activities for extending the simultaneous multi-frequency system to global VLBI network and introduce its science driver, measuring AGN core-shift effects.
Keywords