9 results on '"今西, 昌俊"'
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2. AKARI MIR slitless spectroscopic survey of galaxies at z less than 0.5
- Author
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Oyama, Yoichi, Wada, Takehiko, Matsuhara, Hideo, Takagi, Toshinobu, Malkan, M., Goto, Tomotsugu, Egami, Eiichi, Lee, Hyung Mok, Im, Myung, Kim, J. -H., Pearson, Chris, Inami, Hanae, Oyabu, Shinki, Usui, Fumihiko, Burgarella, Denis, Mazyed, F., Imanishi, Masatoshi, Jeong, Woong-Seob, Miyaji, Takamitsu, DiazTello, J., Nakagawa, Takao, 大山, 陽一, 和田, 武彦, 松原, 英雄, 高木, 俊暢, 後藤, 友嗣, 江上, 英一, 稲見, 華恵, 大薮, 進喜, 臼井, 文彦, 今西, 昌俊, 宮地, 崇光, 中川, 貴雄, Oyama, Yoichi, Wada, Takehiko, Matsuhara, Hideo, Takagi, Toshinobu, Malkan, M., Goto, Tomotsugu, Egami, Eiichi, Lee, Hyung Mok, Im, Myung, Kim, J. -H., Pearson, Chris, Inami, Hanae, Oyabu, Shinki, Usui, Fumihiko, Burgarella, Denis, Mazyed, F., Imanishi, Masatoshi, Jeong, Woong-Seob, Miyaji, Takamitsu, DiazTello, J., Nakagawa, Takao, 大山, 陽一, 和田, 武彦, 松原, 英雄, 高木, 俊暢, 後藤, 友嗣, 江上, 英一, 稲見, 華恵, 大薮, 進喜, 臼井, 文彦, 今西, 昌俊, 宮地, 崇光, and 中川, 貴雄
- Abstract
We aim to study star-forming galaxies by using a blind spectroscopic survey at mid-infrared (MIR) wavelengths to understand evolution of their star formation rate (SFR) and specific SFR (SFR per stellar mass) up to z in the order of 0.5, by paying particular attention to their Polycyclic Aromatic Hydrocarbon (PAH) properties. We conducted a low-resolution (R approximately equal to 50) slitless spectroscopic survey at 5-13 micrometers of 9 micrometers flux-selected sources (approximately greater than 0.3 mJy) around the North Ecliptic Pole with the Infrared Camera (IRC) onboard AKARI. We identified 48 PAH galaxies with PAH 6.2, 7.7, and 8.6 micrometers features at z approximately less than 0.5. The rest-frame optical-MIR spectral energy distributions (SEDs) based on CFHT and AKARI/IRC imaging are produced and analyzed in conjunction with the PAH spectroscopy. The rest-frame SEDs of all PAH galaxies have a universal shape with stellar and 7.7 micrometers (PAH) bumps, except that the PAH enhancement (luminosity ratio of the 7.7 micrometers PAH feature over the 3.5 micrometers stellar bump) significantly varies as a function of the PAH luminosities. We identified a PAH-enhanced population at z approximately less than 0.35, whose SEDs and luminosities are typical of luminous infrared galaxies. They show particularly larger PAH enhancement at high luminosity, implying that they are vigorous star-forming galaxies with elevated specific SFR. Our composite starburst model that combines a young and dusty starburst with a very old population can successfully reproduce most SED characteristics., Meeting Information: The 4th AKARI International Conference: The Cosmic Wheel and the Legacy of the AKARI archive: from galaxies and stars to planets and life (October 17-20, 2017. The University of Tokyo), Bunkyo-ku, Tokyo, Japan, Number of authors: 27, Physical characteristics: Original contains color illustrations, 会議情報: 第4回「あかり」国際会議 (2017年10月17-20日. 東京大学), 文京区, 東京, 著者人数: 27名, 形態: カラー図版あり
- Published
- 2018
3. CLUSTERING OF INFRARED-BRIGHT DUST-OBSCURED GALAXIES REVEALED BY THE HYPER SUPRIME-CAM AND WISE
- Author
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Toba, Yoshiki, Nagao, Tohru, Kajisawa, Masaru, Oogi, Taira, Akiyama, Masayuki, Ikeda, Hiroyuki, Coupon, Jean, Strauss, Michael A., Wang, Wei-Hao, Tanaka, Masayuki, Niida, Mana, Imanishi, Masatoshi, Lee, Chien-Hsiu, Matsuhara, Hideo, Matsuoka, Yoshiki, Onoue, Masafusa, Terashima, Yuichi, Ueda, Yoshihiro, Harikane, Yuichi, Komiyama, Yutaka, Miyazaki, Satoshi, Noboriguchi, Akatoki, Usuda, Tomonori, 鳥羽, 儀樹, 長尾, 透, 鍛冶澤, 賢, 大木, 平, 秋山, 正幸, 池田, 浩行, 仁井田, 真奈, 今西, 昌俊, 松原, 英雄, 松岡, 良樹, 尾上, 匡房, 寺島, 雄一, 上田, 佳宏, 播金, 優一, 小宮山, 裕, 宮崎, 聡, 登口, 暁, 臼田, 知史, Toba, Yoshiki, Nagao, Tohru, Kajisawa, Masaru, Oogi, Taira, Akiyama, Masayuki, Ikeda, Hiroyuki, Coupon, Jean, Strauss, Michael A., Wang, Wei-Hao, Tanaka, Masayuki, Niida, Mana, Imanishi, Masatoshi, Lee, Chien-Hsiu, Matsuhara, Hideo, Matsuoka, Yoshiki, Onoue, Masafusa, Terashima, Yuichi, Ueda, Yoshihiro, Harikane, Yuichi, Komiyama, Yutaka, Miyazaki, Satoshi, Noboriguchi, Akatoki, Usuda, Tomonori, 鳥羽, 儀樹, 長尾, 透, 鍛冶澤, 賢, 大木, 平, 秋山, 正幸, 池田, 浩行, 仁井田, 真奈, 今西, 昌俊, 松原, 英雄, 松岡, 良樹, 尾上, 匡房, 寺島, 雄一, 上田, 佳宏, 播金, 優一, 小宮山, 裕, 宮崎, 聡, 登口, 暁, and 臼田, 知史
- Abstract
著者人数: 23名, Accepted: 2016-12-01
- Published
- 2017
4. 次期赤外線天文衛星SPICAによるサイエンス
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田村, 元秀, 松原, 英雄, 中川, 貴雄, 今西, 昌俊, 児玉, 忠恭, 山田, 亨, 塩谷, 圭吾, 大薮, 進喜, 岡田, 陽子, 金田, 英宏, 北村, 良実, 高木, 俊暢, 和田, 武彦, 高見, 道弘, 岡本, 美子, 尾中, 敬, 酒向, 重行, 左近, 樹, 本田, 充彦, 大坪, 貴文, 深川, 美里, 吉田, 直紀, 相川, 祐里, 須佐, 元, 泉浦, 秀行, 山下, 卓也, SPICAサイエンスWG, Tamura, Motohide, Matsuhara, Hideo, Nakagawa, Takao, Imanishi, Masatoshi, Kodama, Tadayuki, Yamada, Toru, Enya, Keigo, Oyabu, Shinki, Okada, Yoko, Kaneda, Hidehiro, Kitamura, Yoshimi, Takagi, Toshinobu, Wada, Takehiko, Takami, Michihiro, Kataza Okamoto, Yoshiko, Onaka, Takashi, Sako, Shigeyuki, Sakon, Itsuki, Honda, Mitsuhiko, Ootsubo, Takafumi, Fukagawa, Misato, Susa, Hajime, Izumiura, Hideyuki, Yamashita, Takuya, SPICA Science Working Group, 田村, 元秀, 松原, 英雄, 中川, 貴雄, 今西, 昌俊, 児玉, 忠恭, 山田, 亨, 塩谷, 圭吾, 大薮, 進喜, 岡田, 陽子, 金田, 英宏, 北村, 良実, 高木, 俊暢, 和田, 武彦, 高見, 道弘, 岡本, 美子, 尾中, 敬, 酒向, 重行, 左近, 樹, 本田, 充彦, 大坪, 貴文, 深川, 美里, 吉田, 直紀, 相川, 祐里, 須佐, 元, 泉浦, 秀行, 山下, 卓也, SPICAサイエンスWG, Tamura, Motohide, Matsuhara, Hideo, Nakagawa, Takao, Imanishi, Masatoshi, Kodama, Tadayuki, Yamada, Toru, Enya, Keigo, Oyabu, Shinki, Okada, Yoko, Kaneda, Hidehiro, Kitamura, Yoshimi, Takagi, Toshinobu, Wada, Takehiko, Takami, Michihiro, Kataza Okamoto, Yoshiko, Onaka, Takashi, Sako, Shigeyuki, Sakon, Itsuki, Honda, Mitsuhiko, Ootsubo, Takafumi, Fukagawa, Misato, Susa, Hajime, Izumiura, Hideyuki, Yamashita, Takuya, and SPICA Science Working Group
- Abstract
会議情報: 第8回宇宙科学シンポジウム (2008年1月8日-9日. 宇宙航空研究開発機構宇宙科学研究本部(JAXA)(ISAS)相模原キャンパス), 相模原市, 神奈川県, 著者人数: 26名ほか, Meeting Information: 8ｔh Space Science Symposium (January 8-9, 2008. Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency(JAXA)(ISAS)Sagamihara Campus), Sagamihara, Kanagawa Japan
- Published
- 2016
5. Near-infrared Spectroscopy of Quasars at z ～3 and Estimates of Their Supermassive Black Hole Masses
- Author
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Saito, Yuriko, Imanishi, Masatoshi, Minowa, Yosuke, Morokuma, Tomoki, Kawaguchi, Toshihiro, Sameshima, Hiroaki, Minezaki, Takeo, Oi, Nagisa, Nagao, Tohru, Kawatatu, Nozomu, Matsuoka, Kenta, 濟藤, 祐理子, 今西, 昌俊, 美濃和, 陽典, 諸隈, 智貴, 川口, 俊宏, 鮫島, 寛明, 峰崎, 岳夫, 大井, 渚, 長尾, 透, 川勝, 望, 松岡, 健太, Saito, Yuriko, Imanishi, Masatoshi, Minowa, Yosuke, Morokuma, Tomoki, Kawaguchi, Toshihiro, Sameshima, Hiroaki, Minezaki, Takeo, Oi, Nagisa, Nagao, Tohru, Kawatatu, Nozomu, Matsuoka, Kenta, 濟藤, 祐理子, 今西, 昌俊, 美濃和, 陽典, 諸隈, 智貴, 川口, 俊宏, 鮫島, 寛明, 峰崎, 岳夫, 大井, 渚, 長尾, 透, 川勝, 望, and 松岡, 健太
- Abstract
著者人数: 11名, Accepted: 2015-09-21
- Published
- 2016
6. ALMA Observations of the Submillimeter Dense Molecular Gas Traces in the Luminous Type-1 Active Nucleus of NGC 7469
- Author
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Izumi, Takuma, Kohno, Kotaro, Aalto, Susanne, Doi, Akihiro, Espada, Daniel, Fathi, Kambiz, Harada, Nanase, Hatsukade, Bunyo, Hattori, Takashi, Hsieh, Pei-Ying, Ikarashi, Soh, Imanishi, Masatoshi, Iono, Daisuke, Ishizuki, Sumio, Krips, Melanie, Martin, Sergio, Matsushita, Satoki, Meier, David S., Nagai, Hiroshi, Nakai, Naomasa, Nakajima, Taku, Nakanishi, Kouichiro, Nomura, Hideko, Regan, Michael W., Schinnerer, Eva, Sheth, Kartik, Takano, Shuro, Tamura, Yoichi, Terashima, Yuichi, Tosaki, Tomoka, 泉, 拓磨, 河野, 孝太郎, 土居, 明広, 原田, ななせ, 廿日出, 文洋, 服部, 尭, 五十嵐 創, 今西, 昌俊, 伊王野, 大介, 石附, 澄夫, 松下, 聡樹, 永井, 洋, 中井, 直正, 中島, 拓, 中西, 康一郎, 野村, 英子, 高野, 秀路, 田村, 陽一, 寺島, 雄一, 濤崎, 智佳, Izumi, Takuma, Kohno, Kotaro, Aalto, Susanne, Doi, Akihiro, Espada, Daniel, Fathi, Kambiz, Harada, Nanase, Hatsukade, Bunyo, Hattori, Takashi, Hsieh, Pei-Ying, Ikarashi, Soh, Imanishi, Masatoshi, Iono, Daisuke, Ishizuki, Sumio, Krips, Melanie, Martin, Sergio, Matsushita, Satoki, Meier, David S., Nagai, Hiroshi, Nakai, Naomasa, Nakajima, Taku, Nakanishi, Kouichiro, Nomura, Hideko, Regan, Michael W., Schinnerer, Eva, Sheth, Kartik, Takano, Shuro, Tamura, Yoichi, Terashima, Yuichi, Tosaki, Tomoka, 泉, 拓磨, 河野, 孝太郎, 土居, 明広, 原田, ななせ, 廿日出, 文洋, 服部, 尭, 五十嵐 創, 今西, 昌俊, 伊王野, 大介, 石附, 澄夫, 松下, 聡樹, 永井, 洋, 中井, 直正, 中島, 拓, 中西, 康一郎, 野村, 英子, 高野, 秀路, 田村, 陽一, 寺島, 雄一, and 濤崎, 智佳
- Abstract
著者人数: 33名, Accepted: 2015-08-16
- Published
- 2016
7. AKARI Infrared Camera Observations of the 3.3 μm PAH Feature in Swift/BAT AGNs
- Author
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Castro, Angel, Miyaji, Takamitsu, Shirahata, Mai, Ichikawa, Kohei, Oyabu, Shinki, Clark, David M., Imanishi, Masatoshi, Nakagawa, Takao, Ueda, Yoshihiro, 宮地, 崇光, 白旗, 麻衣, 市川, 幸平, 大藪, 進喜, 今西, 昌俊, 中川, 貴雄, 上田, 佳宏, Castro, Angel, Miyaji, Takamitsu, Shirahata, Mai, Ichikawa, Kohei, Oyabu, Shinki, Clark, David M., Imanishi, Masatoshi, Nakagawa, Takao, Ueda, Yoshihiro, 宮地, 崇光, 白旗, 麻衣, 市川, 幸平, 大藪, 進喜, 今西, 昌俊, 中川, 貴雄, and 上田, 佳宏
- Abstract
Accepted: 2014-08-12
- Published
- 2015
8. Submillimeter ALMA Observations of the Dense Gas in the Low-Luminosity Type-1 Active Nucleus of NGC 1097
- Author
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泉, 拓磨, 河野, 孝太郎, Martin, Sergio, Espada, Daniel, 原田, ななせ, 松下, 聡樹, Hsieh, Pei-Ying, Turner, Jean L., Meier, David S., Schinnerer, Eva, 今西, 昌俊, 田村, 陽一, Curran, Max T., 土居, 明広, Fathi, Kambiz, Krips, Melanie, Lundgren, Andreas A., 中井, 直正, 中島, 拓, Regan, Michael W., Sheth, Kartik, 高野, 秀路, 谷口, 暁星, 寺島, 雄一, 濤崎, 智佳, Wiklind, Tommy, Izumi, Takuma, Kohno, Kotaro, Harada, Nanase, Matsushita, Satoki, Imanishi, Masatoshi, Tamura, Yoichi, Doi, Akihiro, Nakai, Naomasa, Nakajima, Taku, Takano, Shuro, Taniguchi, Akio, Terashima, Yuichi, Tosaki, Tomoka, 泉, 拓磨, 河野, 孝太郎, Martin, Sergio, Espada, Daniel, 原田, ななせ, 松下, 聡樹, Hsieh, Pei-Ying, Turner, Jean L., Meier, David S., Schinnerer, Eva, 今西, 昌俊, 田村, 陽一, Curran, Max T., 土居, 明広, Fathi, Kambiz, Krips, Melanie, Lundgren, Andreas A., 中井, 直正, 中島, 拓, Regan, Michael W., Sheth, Kartik, 高野, 秀路, 谷口, 暁星, 寺島, 雄一, 濤崎, 智佳, Wiklind, Tommy, Izumi, Takuma, Kohno, Kotaro, Harada, Nanase, Matsushita, Satoki, Imanishi, Masatoshi, Tamura, Yoichi, Doi, Akihiro, Nakai, Naomasa, Nakajima, Taku, Takano, Shuro, Taniguchi, Akio, Terashima, Yuichi, and Tosaki, Tomoka
- Abstract
著者人数: 26名, Accepted: 2013-06-01
- Published
- 2015
9. ALMA INVESTIGATION OF VIBRATIONALLY EXCITED HCN/HCO+/HNC EMISSION LINES IN THE AGN-HOSTING ULTRALUMINOUS INFRARED GALAXY IRAS 20551−4250.
- Author
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Masatoshi Imanishi (今西昌俊), Kouichiro Nakanishi (中西康一郎), and Takuma Izumi (泉拓磨)
- Subjects
- *
GALAXIES , *VIBRATIONAL spectra , *GALACTIC nuclei , *STARBURSTS , *INFRARED spectra - Abstract
We present the results of ALMA Cycle 2 observations of the ultraluminous infrared galaxy IRAS 20551−4250 at HCN/HCO+/HNC J = 3–2 lines at both vibrational ground (v = 0) and vibrationally excited (v2 = 1) levels. This galaxy contains a luminous buried active galactic nucleus (AGN), in addition to starburst activity, and our ALMA Cycle 0 data revealed a tentatively detected vibrationally excited HCN v2 = 1f J = 4–3 emission line. In our ALMA Cycle 2 data, the HCN/HCO+/HNC J = 3–2 emission lines at v = 0 are clearly detected. The HCN and HNC v2 = 1f J = 3–2 emission lines are also detected, but the HCO+v2 = 1f J = 3–2 emission line is not. Given the high energy level of v2 = 1 and the resulting difficulty of collisional excitation, we compared these results with those of the calculation of infrared radiative pumping, using the available infrared 5–35 μm spectrum. We found that all of the observational results were reproduced if the HCN abundance was significantly higher than that of HCO+ and HNC. The flux ratio and excitation temperature between v2 = 1f and v = 0, after correction for possible line opacity, suggests that infrared radiative pumping affects rotational (J-level) excitation at v = 0 at least for HCN and HNC. The HCN-to-HCO+v = 0 flux ratio is higher than those of starburst-dominated regions, and will increase even more when the derived high HCN opacity is corrected. The enhanced HCN-to-HCO+ flux ratio in this AGN-hosting galaxy can be explained by the high HCN-to-HCO+ abundance ratio and sufficient HCN excitation at up to J = 4, rather than the significantly higher efficiency of infrared radiative pumping for HCN than HCO+. [ABSTRACT FROM AUTHOR]
- Published
- 2016
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