Zobrazeno 1 - 10
of 107
pro vyhledávání: '"Takumi Nagayama"'
Autor:
Mikito Kohno, James O Chibueze, Ross A Burns, Toshihiro Omodaka, Toshihiro Handa, Takeru Murase, Rin I Yamada, Takumi Nagayama, Makoto Nakano, Kazuyoshi Sunada, Kengo Tachihara, Yasuo Fukui
Publikováno v:
Publications of the Astronomical Society of Japan. 75:397-415
We have carried out the NH$_3$ $(J,K)=(1,1),(2,2),$ and $(3,3)$ mapping observations toward the Galactic infrared bubble N49 (G28.83-0.25) using the Nobeyama 45 m telescope. Three NH$_3$ clumps (A, B, and C) were discovered along the molecular filame
Autor:
Mikito Kohno, Toshihiro Omodaka, Toshihiro Handa, James O Chibueze, Takumi Nagayama, Ross A Burns, Takeru Murase, Ren Matsusaka, Makoto Nakano, Kazuyoshi Sunada, Rin I Yamada, John H Bieging
Publikováno v:
Publications of the Astronomical Society of Japan. 74:545-556
We performed NH$_3\ (J,K)=(1,1),(2,2),$ and $(3,3)$ mapping observations toward the Galactic massive star-forming region Sh 2-255 and Sh 2-257 using the Nobeyama 45-m telescope as a part of the KAGONMA (KAgoshima Galactic Object survey with the Nobey
Autor:
Akiharu Nakagawa, Riku Urago, Yuto Morikawa, Masayuki Y. Fujimoto, Takahiro Nagayama, Toshihiro Omodaka, Ken Hirano, Takumi Nagayama, James O. Chibueze
Publikováno v:
Publications of the Astronomical Society of Japan. 72
AP Lyn and V837 Her are long-period Mira variable stars in the Milky Way. We performed VLBI Exploration of Radio Astrometry (VERA) phase-referenced observations towards H2O masers associated with AP Lyn and V837 Her. The annual parallaxes of AP Lyn a
Autor:
Kazuyoshi Sunada, Yuji Ueno, Toshihiro Omodaka, Kazuhito Dobashi, James O. Chibueze, Takumi Nagayama, Shota Hamada, Yoshito Shimajiri, Shinnosuke Inoue, Akifumi Yamabi
Publikováno v:
Publications of the Astronomical Society of Japan. 72
We measured the trigonometric parallax of the H2O maser source associated with the L 1482 molecular filament hosting the most massive young star, LkHα 101, in the California molecular cloud. The measured parallax is 1.879 ± 0.096 mas, corresponding
Autor:
Tomoharu Kurayama, Tomoya Hirota, Yukitoshi Kan-ya, Yuuki Adachi, Mareki Honma, Takumi Nagayama, Yoshiaki Tamura
Publikováno v:
Publications of the Astronomical Society of Japan. 72
We present the VEra Data Analyzer (VEDA) software package for Very Long Baseline Interferometry (VLBI) phase-referencing observations and parallax measurements. The Japanese VLBI project VLBI Exploration of Radio Astrometry (VERA) provides high-preci
Autor:
Yuji Ueno, Masayuki Yamanaka, Koji S. Kawabata, Masayuki Y. Fujimoto, Akiharu Nakagawa, Riku Urago, James O. Chibueze, Tatsuya Nakaoka, Miho Kawabata, Takahiro Nagayama, Takumi Nagayama, Ryohei Yamaguchi, Toshihiro Omodaka, Kengo Takagi
Publikováno v:
Publications of the Astronomical Society of Japan. 72
OZ Geminorum (OZ Gem) is a galactic Mira variable in the Milky Way (MW). We measured its annual parallax with VLBI Exploration of Radio Astrometry to be π = 0.806 ± 0.039 mas, corresponding to a distance of D = 1.24 ± 0.06 kpc. Based on multi-epoc
Autor:
Takaaki Jike, Katsunori M. Shibata, Tomoya Hirota, Mi Kyoung Kim, Toshihiro Omodaka, Hideyuki Kobayashi, Mareki Honma, Takumi Nagayama, Akiharu Nakagawa, Tomoaki Oyama, Daisuke Sakai, Yoshiaki Tamura
Publikováno v:
Publications of the Astronomical Society of Japan. 72
Very Long Baseline Interferometry (VLBI) astrometry using the phase-referencing technique remains an open issue for the quantitative characterization of the observing conditions to achieve a feasible parallax precision of 10 micro-arcseconds (μas).
Autor:
Takumi Nagayama, Yoshiaki Tamura, Atsushi Morita, Tomoharu Kurayama, Mareki Honma, Toshihiro Omodaka, Akiharu Nakagawa, Katsunori M. Shibata, Yuji Ueno, Masako Matsuno, Takaaki Jike
Publikováno v:
Publications of the Astronomical Society of Japan. 72
We report the results of astrometric VLBI observations toward the Mira variable star BX Cam using the VERA VLBI array. The observation was performed from 2012 February to 2014 November. The parallax obtained is 1.73 ± 0.03 mas corresponding to a dis
Autor:
Koji Wada, James O. Chibueze, Toshihiro Omodaka, Masayuki Nagano, Takumi Nagayama, Ken Hirano
Publikováno v:
Publications of the Astronomical Society of Japan. 72
W 48 A core H-2a is one of the young massive protostellar objects in the W 48 region. We conducted multi-epoch astrometric observations of the water (H2O) masers associated with the W 48 A core H-2a with VLBI Exploration of Radio Astrometry (VERA). T
Autor:
Yuuki Adachi, Makoto Shizugami, Yoshiaki Tamura, Syunsaku Suzuki, Nobuyuki Sakai, Daichi Kaseda, Takumi Nagayama, Shota Hamada, Koji Wada, Kazuyoshi Sunada, Jeong Sook Kim, Tomoharu Kurayama, Daichi Inenaga, Tomoya Hirota, Yuan Wei Wu, Hiroyuki Nakanishi, Miyako Oyadomari, Yuri Uno, Riku Urago, Yoshiaki Hagiwara, Chung Sik Oh, Kazuhiro Hada, Ken Takahashi, Atsushi Morita, Kazuya Hachisuka, Fumie Tazaki, Katsunori M. Shibata, Aya Yamauchi, Mao Hashimoto, Koichiro Sugiyama, Hideyuki Kobayashi, Yusuke Kono, Osamu Kameya, Tomoaki Oyama, Daisuke Sakai, Yoon Kyung Choi, Yuji Ueno, Masako Matsuno, Takaaki Jike, Jungha Kim, Toshihiro Omodaka, Kazuyoshi Yamashita, Takeru Murase, Yuto Yamashita, Ken Hirano, Kotaro Niinuma, Hiroshi Imai, Kazuhito Motogi, Toshio Ishikawa, Mareki Honma, Yushi Hirata, Junya Nishi, James O. Chibueze, Toshihiro Handa, Akiharu Nakagawa, Ross A. Burns, Mi Kyoung Kim, Jumpei Sudo, Takanori Ichikawa, Satoko Sawada-Satoh, Akito Yuda
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 astrometry results from VERA, providing accurate trigonometric annual par
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::2ab763141284a86a61bdddacb90ad1c1