Takumi Nagayama

Rakuwakai Otowa Hospital — Japan

Physics and Astronomy · Physical Sciences

19h-index1.6kcitations85works3.02yr avg
OpenAlex↗Google Scholar↗Lab page↗

Accepting Students?

No reports yet. Know if this professor is taking students?

Research Topics

Astrophysics and Star Formation Studies(64), Stellar, planetary, and galactic studies(58), Astrophysics and Cosmic Phenomena(32), Galaxies: Formation, Evolution, Phenomena(13), Gamma-ray bursts and supernovae(12)

Publications85 total

Relationship between employment status and 6-min walk distance in male patients with chronic obstructive pulmonary disease
Aging Medicine and Healthcare·2026Open Access
Trigonometric parallax and proper motion of Sagittarius A* measured by VERA using the new broad-band back-end system OCTAVE-DAS
Publications of the Astronomical Society of Japan·2024· 6 citedOpen Access
Water maser distributions and their internal motions in the Sagittarius B2 complex
Publications of the Astronomical Society of Japan·2023· 3 citedOpen Access
Ammonia mapping observations of the Galactic infrared bubble N49: Three NH3 clumps along the molecular filament
Publications of the Astronomical Society of Japan·2023· 2 citedOpen Access
Ammonia mapping observations of the Galactic infrared bubble N49: Three NH$_3$ clumps along the molecular filament
arXiv (Cornell University)·2023Open Access
Ammonia mapping observations toward the Galactic massive star-forming region Sh 2-255 and Sh 2-257
Publications of the Astronomical Society of Japan·2022· 9 citedOpen Access
Astrometry and infrared observations of the Mira variable stars AP Lyncis, V837 Herculis, and BX Camelopardalis: Implications for the period–luminosity relation of the Milky Way
Publications of the Astronomical Society of Japan·2020· 5 cited
Star formation rates in the L 1482 filament of the California molecular cloud
Publications of the Astronomical Society of Japan·2020· 3 cited
VEDA: VERA data analysis software for VLBI phase-referencing astrometry
Publications of the Astronomical Society of Japan·2020· 7 cited
Performance of VERA in 10 micro-arcsecond astrometry
Publications of the Astronomical Society of Japan·2020· 7 cited
Trigonometric parallax of O-rich Mira variable star OZ Gem (IRAS 07308+3037): A confirmation of the difference between the P–L relations of the Large Magellanic Cloud and the Milky Way
Publications of the Astronomical Society of Japan·2020· 10 cited
Astrometry of H2O masers in the W 48 A (G35.20−01.74) H <scp>ii</scp> region with VERA: A compact disk outflow inside core H-2a
Publications of the Astronomical Society of Japan·2020· 2 cited
Current Results of the VERA K/Q-band Fringe Survey: Performance of the 8-Gbps Recording System and its Effectiveness
2019
Annual parallax and galactic orbit of Y Librae (IRAS 15090−0549) Mira variable star—GALORB release
Publications of the Astronomical Society of Japan·2019· 4 citedOpen Access
Astrometric observation of the Galactic LPVs with VERA; Mira and OH/IR stars
Proceedings of the International Astronomical Union·2018
Correlation between SiO <i>v</i> = 3 <i>J</i> = 1 → 0 maser excitation and the light curve of a long-period variable star
Publications of the Astronomical Society of Japan·2018· 2 citedOpen Access
SiO v=3 J=1→0メーザ励起と長周期変光星の光度曲線の間の相関
Publications of the Astronomical Society of Japan·2018
VERA Single Dish Observations
Proceedings of the International Astronomical Union·2017
Maser Astrometry and Galactic Structure Study with VLBI
Proceedings of the International Astronomical Union·2017
VLBI astrometry of a water maser source in the Sgr B2 complex with VERA
Proceedings of the International Astronomical Union·2017· 1 cited
page 1 of 5Next →

Frequent Co-authors

Toshihiro Omodaka(39), Hideyuki Kobayashi(28), Mareki Honma(27), Akiharu Nakagawa(27), Hiroshi Imai(23), Tomoaki Oyama(23), Tomoya Hirota(22), Tomoharu Kurayama(22), Noriyuki Kawaguchi(19), Takeshi Miyaji(17), Takaaki Jike(15), Katsuhisa Sato(15), Toshihiro Handa(15), Yukitoshi Kan‐ya(14), Katsunori M. Shibata(14), James O. Chibueze(14), Takeshi Bushimata(13), Yoon Kyung Choi(13), Osamu Kameya(13), Seisuke Kuji(13)