Zobrazeno 1 - 10
of 244
pro vyhledávání: '"Nagayama, Takumi"'
Autor:
Oyama, Tomoaki, Nagayama, Takumi, Yamauchi, Aya, Sakai, Daisuke, Imai, Hiroshi, Honma, Mareki, Asakura, Yu, Hada, Kazuhiro, Hagiwara, Yoshiaki, Hirota, Tomoya, Jike, Takaaki, Kono, Yusuke, Suzuki, Syunsaku, Kobayashi, Hideyuki, Kawaguchi, Noriyuki
We successfully measured the trigonometric parallax of Sagittarius A* (Sgr A*) to be $117\pm17$ micro-arcseconds ($\mu$as) using the VLBI Exploration of Radio Astrometry (VERA) with the newly developed broad-band signal-processing system named OCTAVE
Externí odkaz:
http://arxiv.org/abs/2401.02312
Autor:
Kohno, Mikito, Chibueze, James O., Burns, Ross A., Omodaka, Toshihiro, Handa, Toshihiro, Murase, Takeru, Yamada, Rin I., Nagayama, Takumi, Nakano, Makoto, Sunada, Kazuyoshi, Tachihara, Kengo, Fukui, Yasuo
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
Externí odkaz:
http://arxiv.org/abs/2301.07993
Autor:
Kohno, Mikito, Omodaka, Toshihiro, Handa, Toshihiro, Chibueze, James O., Nagayama, Takumi, Burns, Ross A., Murase, Takeru, Matsusaka, Ren, Nakano, Makoto, Sunada, Kazuyoshi, Yamada, Rin I., Bieging, John H.
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
Externí odkaz:
http://arxiv.org/abs/2202.01518
Autor:
Matsuno, Masako, Nakagawa, Akiharu, Morita, Atsushi, Kurayama, Tomoharu, Omodaka, Toshihiro, Nagayama, Takumi, Honma, Mareki, Shibata, Katsunori M, Ueno, Yuji, Jike, Takaaki, Tamura, Yoshiaki
We report results of astrometric VLBI observations toward a Mira variable star BX~Cam using the VLBI array "VERA". The observations were performed from February 2012 to November 2014. Obtained parallax is 1.73$\pm$0.03 mas corresponding to a distance
Externí odkaz:
http://arxiv.org/abs/2003.03038
Autor:
VERA collaboration, Hirota, Tomoya, Nagayama, Takumi, Honma, Mareki, Adachi, Yuuki, Burns, Ross A., Chibueze, James O., Choi, Yoon Kyung, Hachisuka, Kazuya, Hada, Kazuhiro, Hagiwara, Yoshiaki, Hamada, Shota, Handa, Toshihiro, Hashimoto, Mao, Hirano, Ken, Hirata, Yushi, Ichikawa, Takanori, Imai, Hiroshi, Inenaga, Daichi, Ishikawa, Toshio, Jike, Takaaki, Kameya, Osamu, Kaseda, Daichi, Kim, Jeong Sook, Kim, Jungha, Kim, Mi Kyoung, Kobayashi, Hideyuki, Kono, Yusuke, Kurayama, Tomoharu, Matsuno, Masako, Morita, Atsushi, Motogi, Kazuhito, Murase, Takeru, Nakagawa, Akiharu, Nakanishi, Hiroyuki, Niinuma, Kotaro, Nishi, Junya, Oh, Chung Sik, Omodaka, Toshihiro, Oyadomari, Miyako, Oyama, Tomoaki, Sakai, Daisuke, Sakai, Nobuyuki, Sawada-Satoh, Satoko, Shibata, Katsunori M., Shizugami, Makoto, Sudo, Jumpei, Sugiyama, Koichiro, Sunada, Kazuyoshi, Suzuki, Syunsaku, Takahashi, Ken, Tamura, Yoshiaki, Tazaki, Fumie, Ueno, Yuji, Uno, Yuri, Urago, Riku, Wada, Koji, Wu, Yuan Wei, Yamashita, Kazuyoshi, Yamashita, Yuto, Yamauchi, Aya, Yuda, Akito
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:
http://arxiv.org/abs/2002.03089
Autor:
Sakai, Nobuyuki, Nagayama, Takumi, Nakanishi, Hiroyuki, Koide, Nagito, Kurayama, Tomoharu, Izumi, Natsuko, Hirota, Tomoya, Yoshida, Toshihiro, Shibata, Katsunori M., Honma, Mareki
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$^{\circ}$ and Galactocentric distances of $>$ 11 kpc at the Galactic l
Externí odkaz:
http://arxiv.org/abs/1910.08146
Autor:
Koide, Nagito, Nakanishi, Hiroyuki, Sakai, Nobuyuki, Habe, Asao, Shima, Kazuhiro, Kurayama, Tomoharu, Matsuo, Mitsuhiro, Tezuka, Daisuke, Kurahara, Kohei, Ueno, Saeko, Burns, Ross A., Nakagawa, Akiharu, Honma, Mareki, Shibata, Katsunori M., Nagayama, Takumi, Kawaguchi, Noriyuki
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 using VLBI Exploration of Radio Astrometry (VERA) to measure its annual p
Externí odkaz:
http://arxiv.org/abs/1909.09930
Autor:
Burns, Ross A., Handa, Toshihiro, Omodaka, Toshihiro, Sobolev, Andrej M., Kirsanova, Maria S., Nagayama, Takumi, Chibueze, James O., Kohno, Mikito, Nakano, Makoto, Sunada, Kazuyoshi, Ladeyschikov, Dmitry A.
Star formation is thought to be driven by two groups of mechanisms; spontaneous collapse and triggered collapse. Triggered star formation mechanisms further diverge into cloud-cloud collision (CCC), "collect and collapse" (C\&C) and shock induced col
Externí odkaz:
http://arxiv.org/abs/1908.00954
Autor:
Sudou, Hiroshi, Omodaka, Toshihiro, Murakami, Kotone, Nagayama, Takahiro, Nakagawa, Akiharu, Urago, Riku, Nagayama, Takumi, Hirano, Ken, Honma, Mareki
Many studies have shown that there are clear sequences in the period-luminosity relationship (PLR) for Mira variables and semiregular variables (SRVs) in the Large Magellanic Cloud (LMC). To investigate the PLR for SRVs in our galaxy, we examined the
Externí odkaz:
http://arxiv.org/abs/1810.13064
Autor:
Ogbodo, Chikaedu, Burns, Ross, Handa, Toshihiro, Nagayama, Takumi, Chibueze, James, Omodaka, Toshihiro, Honma, Mareki, Nakagawa, Akiharu, Ubachukwu, Augustine, Eze, Romanus
From measuring the annual parallax of water masers over one and a half years with VERA, we present the trigonometric parallax and corresponding distance of another newly identified water maser source in the region of IRAS 20231+3440 as $\pi=0.611\pm0
Externí odkaz:
http://arxiv.org/abs/1705.02557