299 citations · 515 across the 12 of their papers we have counts for
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VLBI astrometry of radio stars to link radio and optical celestial reference frames - II. 11 radio stars
Jingdong Zhang, Bo Zhang, Shuangjing Xu +10
The alignment between the radio-based International Celestial Reference Frame (ICRF) and the optical Gaia Celestial Reference Frame (Gaia-CRF) is critical for multi-waveband astron…
On the Nature of the Protoplanetary Nebula OH\,231.8+4.2
Andreas Brunthaler, Yoon Kyung Choi, Karl M. Menten +1
Aims. OH 231.8+4.2 , also known as the Rotten Egg or Calabash nebula is a protoplanetary nebula which is seen in the direction of the open cluster M 46. While an association of the…
The Distance and Size of the Red Hypergiant NML Cyg from VLBA and VLA Astrometry
B. Zhang, M. J. Reid, K. M. Menten +2
We have measured the annual parallax and proper motion of NML Cyg from multiple epoch VLBA observations of the circulstellar H2O and SiO masers. The measured parallax of NML Cyg is…