[Speaker 1]
Min Cheul Hong D2, SOKENDAI, Mitaka（supervisor : Mareki Honma）
[Title]
VERA observatons of SiO masers toward Symbiotic star R Aquarii – Determination of orbital parameters
[Abstract]
Symbiotic stars are now generally understood as binary systems comprising a cool late-type star and a hot compact companion.
Interacting between the components presents a good laboratory for studying variety of physical processes, and their study gives important implications for the binary evolution.
R Aquarii (R Aqr) is one of the closest and most studied symbiotic star, but its orbital parameters are still under debated.
In order to extract the orbital parameters, we have been observing the R Aqr system of the SiO maser with the VERA (VLBI Exploration of Radio Astrometry) which can allows us to conduct precise astrometry of the maser sources.
Here, I will report observational results of the preliminary orbital parameters for R Aqr system.

[Speaker 2]
Onitsuka Masahiro M2, SOKENDAI, Mitaka（supervisor : Tomonori Usuda）
[Title]
Infrared Transit Observations of the Very Young Hot Jupiter CVSO30b
[Abstract]
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