Astrometric observation of the Galactic LPVs with VERA; Mira and OH/IR stars

Akiharu Nakagawa,Tomoharu Kurayama,Gabor Orosz,Tomoaki Oyama,Takumi Nagayama,Toshihiro Omodaka

Proceedings of the International Astronomical Union（2018）

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摘要

We present studies of Long Period Variables (LPVs) in our Galaxy based on astrometric VLBI observations of H2O and SiO masers. The Galactic Miras and OH/IR stars are our main targets. For Miras, we present the distribution of the LPVs on the MK – log P plane. Galactic Miras show consistency with PLR in the LMC except for some fainter sources. Parallaxes of the LPVs determined from VLBI and Gaia are compared. There seems to be some offset.

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