Zobrazeno 1 - 10
of 73
pro vyhledávání: '"Naoi, Takahiro"'
We have studied optical properties of interstellar dust around the Orion A molecular cloud to investigate the size distribution and the composition of dust grains. Orion A is one of the most studied molecular clouds in the solar vicinity ($d \simeq 4
Externí odkaz:
http://arxiv.org/abs/2107.01043
Autor:
Iwai, Kazumasa, Kubo, Yûki, Ishibashi, Hiromitsu, Naoi, Takahiro, Harada, Kenichi, Ema, Kenji, Hayashi, Yoshinori, Chikahiro, Yuichi
We have developed a digital fast Fourier transform (FFT) spectrometer made of an analog-to-digital converter (ADC) and a field-programmable gate array (FPGA). The base instrument has independent ADC and FPGA modules, which allow us to implement diffe
Externí odkaz:
http://arxiv.org/abs/1706.08863
Autor:
Higuchi, Aya E., Kurono, Yasutaka, Naoi, Takahiro, Saito, Masao, Mauersberger, Rainer, Kawabe, Ryohei
We present maps of 7 young massive molecular clumps within 5 target regions in the C18O (J=1-0) line emission, using the Nobeyama 45m telescope. These clumps, which are not associated with clusters, lie at distances between 0.7 to 2.1 kpc. We find C1
Externí odkaz:
http://arxiv.org/abs/1301.3199
Autor:
Saito, Masao, Inatani, Junji, Nakanishi, Kouichiro, Naoi, Takahiro, Yamada, Masumi, Saito, Hiro, Ikenoue, Bungo, Kato, Yoshihiro, Morita, Kou-ichiro, Mizuno, Norikazu, Iguchi, Satoru
We report major performance test results of the Atacama Compact Array (ACA) 7-m and 12-m antennas of ALMA (Atacama Large Millimeter/submillimeter Array). The four major performances of the ACA antennas are all-sky pointing (to be not more than 2.0 ar
Externí odkaz:
http://arxiv.org/abs/1106.3472
Autor:
Mayama, Satoshi, Tamura, Motohide, Hanawa, Tomoyuki, Matsumoto, Tomoaki, Ishii, Miki, Pyo, Tae-Soo, Suto, Hiroshi, Naoi, Takahiro, Kudo, Tomoyuki, Hashimoto, Jun, Nishiyama, Shogo, Kuzuhara, Masayuki, Hayashi, Masahiko
Publikováno v:
Science, Volume 327, Issue 5963, pp. 306-308 (2010)
Studies of the structure and evolution of protoplanetary disks are important for understanding star and planet formation. Here, we present the direct image of an interacting binary protoplanetary system. Both circumprimary and circumsecondary disks a
Externí odkaz:
http://arxiv.org/abs/1007.0839
Autor:
Naoi, Takahiro, Tamura, Motohide, Nagata, Tetsuya, Nakajima, Yasushi, Suto, Hiroshi, Murakawa, Koji, Kandori, Ryo, Sasaki, Sho, Nishiyama, Shogo, Oasa, Yumiko, Sugitani, Koji
We have conducted J, H, and Ks imaging observations for the Coalsack Globule 2 with the SIRIUS infrared camera on the IRSF 1.4 m telescope at SAAO, and determined the color excess ratio, E(J-H)/E(H-Ks). The ratio is determined in the same photometric
Externí odkaz:
http://arxiv.org/abs/astro-ph/0612620
Autor:
Nishiyama, Shogo, Nagata, Tetsuya, Sato, Shuji, Kato, Daisuke, Nagayama, Takahiro, Kusakabe, Nobuhiko, Matsunaga, Noriyuki, Naoi, Takahiro, Sugitani, Koji, Tamura, Motohide
Publikováno v:
Astrophys.J.647:1093-1098,2006
On the basis of the near infrared observations of bulge red clump stars near the Galactic center, we have determined the galactocentric distance to be R_0 = 7.52 +- 0.10 (stat) +- 0.35 (sys) kpc. We observed the red clump stars at |l| < 1.0 deg and 0
Externí odkaz:
http://arxiv.org/abs/astro-ph/0607408
Autor:
Matsunaga, Noriyuki, Fukushi, Hinako, Nakada, Yoshikazu, Tanabe, Toshihiko, Feast, Michael W., Menzies, John W., Ita, Yoshifusa, Nishiyama, Shogo, Baba, Daisuke, Naoi, Takahiro, Nakaya, Hidehiko, Kawadu, Takahiro, Ishihara, Akika, Kato, Daisuke
Publikováno v:
Mon.Not.Roy.Astron.Soc.370:1979-1990,2006
We report the result of our near-infrared observations (JHKs) for type II Cepheids (including possible RV Tau stars) in galactic globular clusters. We detected variations of 46 variables in 26 clusters (10 new discoveries in seven clusters) and prese
Externí odkaz:
http://arxiv.org/abs/astro-ph/0606609
Autor:
Nishiyama, Shogo, Nagata, Tetsuya, Kusakabe, Nobuhiko, Matsunaga, Noriyuki, Naoi, Takahiro, Kato, Daisuke, Nagashima, Chie, Sugitani, Koji, Tamura, Motohide, Tanabe, Toshihiko, Sato, Shuji
Publikováno v:
Astrophys.J. 638 (2006) 839-846
We have determined the ratios of total to selective extinction in the near-infrared bands (J, H, Ks) toward the Galactic center from the observations of the region |l| < 2.0deg and 0.5deg < |b| < 1.0deg with the IRSF telescope and the SIRIUS camera.
Externí odkaz:
http://arxiv.org/abs/astro-ph/0601174
Autor:
Kandori, Ryo, Nakajima, Yasushi, Tamura, Motohide, Tatematsu, Ken'ichi, Aikawa, Yuri, Naoi, Takahiro, Sugitani, Koji, Nakaya, Hidehiko, Nagayama, Takahiro, Nagata, Tetsuya, Kurita, Mikio, Kato, Daisuke, Nagashima, Chie, Sato, Shuji
Publikováno v:
Astron.J.130:2166-2184,2005
On the basis of near-infrared imaging observations, we derived visual extinction (Av) distribution toward ten Bok globules through measurements of both the color excess (E_{H-K}) and the stellar density at J, H, and Ks (star count). Radial column den
Externí odkaz:
http://arxiv.org/abs/astro-ph/0506205