176 citations
Counting papers with at most 25 authors, so collaboration author lists do not stand in for the people here.
- National Astronomical Observatory of JapanJP17 papers
- Kagoshima UniversityJP16 papers
- Korea Astronomy and Space Science InstituteKR10 papers
- The Graduate University for Advanced Studies, SOKENDAIJP9 papers
- Kyung Hee UniversityKR4 papers
- Shanghai Astronomical ObservatoryCN4 papers
- Yamaguchi UniversityJP4 papers
- Hokkaido UniversityJP3 papers
- Max Planck Institute for Radio AstronomyDE3 papers
- The University of TokyoJP3 papers
- Chinese Academy of SciencesCN2 papers
- International Centre for Radio Astronomy ResearchAU2 papers
10 papers · 1 filter
EAVN Astrometry toward the Extreme Outer Galaxy: Kinematic distance with the proper motion of G034.84-00.95
Nobuyuki Sakai, Bo Zhang, Shuangjing Xu +22
We aim to reveal the structure and kinematics of the Outer-Scutum-Centaurus (OSC) arm located on the far side of the Milky Way through very long baseline interferometry (VLBI) astr…
The First VERA Astrometry Catalog
VERA collaboration, Tomoya Hirota, Takumi Nagayama +59
We present the first astrometry catalog from the Japanese VLBI (very long baseline interferometer) project VERA (VLBI Exploration of Radio Astrometry). We have compiled all the ast…
Vertical Structure and Kinematics of the Galactic Outer Disk
Nobuyuki Sakai, Takumi Nagayama, Hiroyuki Nakanishi +7
We report measurements of parallax and proper motion for four 22 GHz water maser sources as part of VERA Outer Rotation Curve project. All sources show Galactic latitudes of 2$…
Outer rotation curve of the Galaxy with VERA IV: Astrometry of IRAS 01123+6430 and the possibility of cloud-cloud collision
Nagito Koide, Hiroyuki Nakanishi, Nobuyuki Sakai +13
As part our investigation into the Galactic rotation curve, we carried out Very Long Baseline Interferometry (VLBI) observations towards the star-forming region IRAS 01123+6430 usi…
Outer Rotation Curve of the Galaxy with VERA III: Astrometry of IRAS 07427-2400 and Test of the Density-Wave Theory
Nobuyuki Sakai, Hiroyuki Nakanishi, Mitsuhiro Matsuo +6
We report the trigonometric parallax of IRAS 07427-2400 with VERA to be 0.185 0.027 mas, corresponding to a distance of 5.41 kpc. The result is consistent w…
Outer Rotation Curve of the Galaxy with VERA II: Annual Parallax and Proper Motion of the Star-Forming Region IRAS21379+5106
Hiroyuki Nakanishi, Nobuyuki Sakai, Tomoharu Kurayama +7
We conducted astrometric VLBI observations of water-vapor maser emission in the massive star forming region IRAS 21379+5106 to measure the annual parallax and proper motion, using…
The First Very Long Baseline Interferometry Image of 44 GHz Methanol Maser with the KVN and VERA Array (KaVA)
Naoko Matsumoto, Tomoya Hirota, Koichiro Sugiyama +58
We have carried out the first very long baseline interferometry (VLBI) imaging of 44 GHz class I methanol maser (7_{0}-6_{1}A^{+}) associated with a millimeter core MM2 in a massiv…
Evolution of the Water Maser Expanding Shell in W75N VLA 2
Jeong-Sook Kim, Soon-Wook Kim, Tomoharu Kurayama +6
We present Very Long Baseline Interferometry (VLBI) observations of 22 GHz HO masers in the high-mass star-forming region of \objectname{W75N}, carried out with VLBI Exploratio…
The outer rotation curve project with VERA: Trigonometric parallax of IRAS 05168+3634
Nobuyuki Sakai, Mareki Honma, Hiroyuki Nakanishi +3
We present a measurement of the trigonometric parallax of IRAS 05168+3634 with VERA. The parallax is 0.532 +/- 0.053 mas, corresponding to a distance of 1.88 +0.21/-0.17 kpc. This…
Fundamental Parameters of the Milky Way Galaxy Based on VLBI astrometry
Mareki Honma, Takumi Nagayama, Kazuma Ando +31
We present analyses to determine the fundamental parameters of the Galaxy based on VLBI astrometry of 52 Galactic maser sources obtained with VERA, VLBA and EVN. We model the Galax…