研究者業績

磯部 直樹

イソベ ナオキ  (Naoki Isobe)

基本情報

所属
国立研究開発法人宇宙航空研究開発機構 宇宙科学研究所 宇宙物理学研究系 助教
学位
博士(理学)(2002年3月 東京大学理学系研究科物理学専攻)

J-GLOBAL ID
202001017082346100
researchmap会員ID
R000012159

受賞

 2

主要な論文

 119

MISC

 57
  • 磯部直樹, 臼井文彦, 鹿島伸悟, 片坐宏一, 大澤亮, 鹿野良平, 末松芳法, 間瀬一郎, 山田良透, 服部友哉, 武田晃一, 有馬佑希那, JASMINE チーム
    日本天文学会2024年秋季年会講演予稿集 2024年9月  筆頭著者
  • 磯部直樹, 紀基樹, 永井 洋, 田代信, 馬場俊介, 中川貴雄
    日本天文学会2024年秋季年会講演予稿集 2024年9月  筆頭著者
  • 井口聖, 磯部直樹, 山田亨, 大西利和, 山崎康正, 松本健, 山内大介, 土屋史紀, 高橋慶太郎, 岩田隆浩, 宇佐美尚人, 関本裕太郎, 宮崎康行, 佐伯孝尚, 森治, 吉光徹雄
    日本天文学会年会講演予稿集 2024 2024年3月  
  • 武知可夏, 永井洋, 川勝望, 磯部直樹, 紀基樹, 泉拓磨, 中西康一郎, 笹田真人, 土居明広
    日本天文学会年会講演予稿集 2024 2024年  
  • 山崎康正, 井口聖, 松本健, 大西利和, 山田亨, 磯部直樹, 山内大介, 土屋史紀, 高橋慶太郎, 岩田隆浩, 宇佐美尚人, 関本裕太郎, 宮崎康行, 佐伯孝尚, 森治, 吉光徹雄
    日本天文学会年会講演予稿集 2024 2024年  
  • 松本健, 大西利和, 小川英夫, 井口聖, 山崎康正, 山内大介, 土屋史紀, 高橋慶太郎, 山田亨, 磯部直樹, 岩田隆浩, 宇佐美尚人, 関本裕太郎, 宮崎康行, 佐伯孝尚, 森治, 吉光徹雄
    日本天文学会年会講演予稿集 2024 2024年  
  • 岩田隆浩, 土屋史紀, 山田亨, 磯部直樹, 関本裕太郎, 宮崎康行, 宇佐美尚人, 井口聖, 山崎康正, 大西利和, 松本健, 高橋慶太郎, 山内大介
    日本惑星科学会秋季講演会予稿集(Web) 2024 2024年  
  • Hori, T, Shidatsu, M, Ueda, Y, Kawamuro, T, Morii, M, Nakahira, S, Isobe, N, Kawai, N, Mihara, T, Matsuoka, M, Morita, T, Nakajima, M, Negoro, H, Oda, S, Sakamoto, T, Serino, M, Sugizaki, M, Tanimoto, A, Tomida, H, Tsuboi, Y, Tsunemi, H, Ueno, S, Yamaoka, K, Yamada, S, Yoshida, A, Iwakiri, W, Kawakubo, Y, Sugawara, Y, Sugita, S, Tachibana, Y, Yoshii, T
    VizieR On-line Data Catalog 2023年10月  
  • 井口聖, 自然科学研究機構国立天文台, 山田亨(JAXA 宇宙科学研究所, 大西利和, 山崎康正, 松, 本健, 山内大介, 土屋史紀, 高橋慶太郎, 磯部直樹, 岩田隆浩, 宇佐美尚人, 関本裕太郎, 宮崎康行, 佐伯孝尚, 森治, 吉光徹雄
    日本天文学会年会講演予稿集 2023 2023年9月  
  • 末松芳法, 都築俊宏, 小原直樹, 磯部直樹, 鹿島伸悟ほか, JASMINE光学系検討チーム
    日本天文学会年会講演予稿集 2023 2023年9月  
  • 磯部 直樹 (ISAS/JAXA), 永井 洋 (国立天文台), 紀 基樹 (工学院大学/国立天文台), 馬場 俊介 (鹿児 島大), 中川 貴雄 (ISAS/JAXA), 砂田 裕志, 田代 信 (埼玉大学)
    日本天文学会年会講演予稿集 2023 2023年9月  筆頭著者
  • 佐野, 圭, 趙, 孟佑, 北村, 健太郎, 寺本, 万里子, 増井, 博一, 布施, 哲人, 瀧本, 幸司, 中川, 貴雄, 松原, 英雄, 磯部, 直樹, 和田, 武彦, 宮崎, 康行, 船瀬, 龍, 松浦, 周二, 津村, 耕司, 高橋, 葵, 五十里, 哲, 谷津, 陽一, 軸屋, 一郎, 青柳, 賢英
    V237a 2023年3月  
    日本天文学会2023年春季年会, 2023年3月13日-16日, 立教大学, 東京
  • 佐野, 圭, 趙, 孟佑, 北村, 健太郎, 寺本, 万里子, 増井, 博一, 布施, 哲人, 瀧本, 幸司, ORGER, Necmi, CORODOVA-Alagon, Jose Rodrigo, SCHULZ, Victor Hugo, AMPADU, Ofosu Joseph, 中川, 貴雄, 宮崎, 康行, 松原, 英雄, 和田, 武彦, 磯部, 直樹, 船瀬, 龍, 津村, 耕司, 松浦, 周二, 高橋, 葵, 五十里, 哲, 谷津, 陽一, 軸屋, 一郎, 青柳, 賢英
    第23回宇宙科学シンポジウム 講演集 2023年1月  
    レポート番号: S2-004
  • 瀧本幸司, 佐野圭, 當銘優斗, 川崎悠貴, 中川俊輔, AREDA Eyoas Ergetu, FIELDING Ezra, CHATAR Keenan Alexsei Aamir, 松浦周二, 廣瀬優樹, 小鹿哲雅, 津本明音, 津村耕司, 中川貴雄, 松原英雄, 磯部直樹, 榎木谷海, 田中颯, 高橋葵
    日本天文学会年会講演予稿集 2023 2023年  
  • 佐野圭, 趙孟佑, 北村健太郎, 寺本万里子, 増井博一, 布施哲人, 瀧本幸司, 山内貴志, 中山大輔, OERGER Necmi Cihan, CORDOVA-ALARCON Jose Rodrigo, SCHULZ Victor Hugo, OFOSU Joseph, 中川貴雄, 松原英雄, 磯部直樹, 宮崎康行, 平子敬一, 船瀬龍, 松浦周二, 和田武彦, 津村耕司, 高橋葵, 五十里哲, 谷津陽一, 軸屋一郎, 青柳賢英
    日本天文学会年会講演予稿集 2023 2023年  
  • 日本天文学会年会講演予稿集 2022 2022年9月  
  • 日本天文学会年会講演予稿集 2022 2022年9月  
  • 松本 光生, ISAS/JAXA, 中川 貴雄, ISAS, JAXA, 和田 桂一, 馬場 俊介, 工藤祐己, 磯部直樹, ISAS, JAXA
    日本天文学会年会講演予稿集 2022 2022年9月  最終著者
  • 鹿島伸悟, 矢野太平, 上田暁俊, 辰巳大輔, 小宮山裕, 末松芳法, 鹿野良平, 郷田直輝, 山田良透, 片坐宏一, 臼井文彦, 磯部直樹, JASMINE チーム
    日本天文学会年会講演予稿集 2022 2022年9月  
  • 磯部 直樹, 片坐 宏一, 臼井 文彦, 郷田 直輝, 鹿野 良平, 山田 良透, 河原創, JASMINEプロジェクトチーム
    日本天文学会年会講演予稿集 2022 2022年9月  筆頭著者
  • 大西崇介, 大西崇介, 中川貴雄, 馬場俊介, 松本光生, 松本光生, 磯部直樹, 白旗麻衣, 寺田宏, 臼田知史, 大薮進喜
    日本天文学会年会講演予稿集 2022 2022年  
  • 馬場俊介, 矢野健一, 中川貴雄, 磯部直樹, 白旗麻衣, 松本光生, 大西崇介, 道井亮介, MALKAN Matthew A., BHALOTIA Vanshree
    日本天文学会年会講演予稿集 2022 2022年  
  • 大西崇介, 大西崇介, 中川貴雄, 馬場俊介, 松本光生, 松本光生, 道井亮介, 道井亮介, 磯部直樹, 白旗麻衣, 寺田宏, 臼田知史
    日本天文学会年会講演予稿集 2021 2021年  
  • 馬場俊介, 今西昌俊, 泉拓磨, NGUYEN Dieu D., 川室太希, 中川貴雄, 磯部直樹, 大西崇介, 大西崇介, 松本光生, 松本光生
    日本天文学会年会講演予稿集 2021 2021年  
  • 東谷千比呂, 中川貴雄, 松原英雄, 鈴木仁研, 磯部直樹, 篠崎慶亮, 西城大, 松本潤, 澤田健一郎, 安藤麻紀子, 内田英樹, 北本和也, 佐藤洋一, 水谷忠均, 巳谷真司, 後藤健, 竹内伸介, 小川博之, 金田英宏
    日本天文学会年会講演予稿集 2021 2021年  
  • Takehiko Wada, Hidehiro Kaneda, Takuma Kokusho, Toyoaki Suzuki, Kumiko Morihana, Takurou Tsuchikawa, Yuki Kuroda, Daichi Ishikawa, Shinki Oyabu, Naoki Isobe, Daisuke Ishihara, Hideo Matsuhara, Koichi Nagase, Takao Nakagawa, Takafumi Ootsubo, Mitsuyoshi Yamagishi, Hiroshi Maeshima, Shunsuke Onishi, Kosei Matsumoto, Satoshi Itoh, Mizuho Uchiyama, Ryan Lau, Hiromichi Ebihara, Hanae Inami, Koji Kawabata, Yasumasa Kasaba, Takeshi Sakanoi, Yoshifusa Ita, Masayuki Akiyama, Itsuki Sakon, Takafumi Kamizuka, Takashi Miyata, Kohji Tsumura, Masato Naruse, Youichi Ohyama, Shiang-Yu Wang, Hiroshi Shibai
    Space Telescopes and Instrumentation 2020: Optical, Infrared, and Millimeter Wave 2020年12月13日  
  • 馬場俊介, 中川貴雄, 磯部直樹, 白旗麻衣, 道井亮介, 大西崇介
    日本天文学会年会講演予稿集 2019 2019年  
  • Daisuke Ishihara, Shinki Oyabu, Misato Fukagawa, Takuma Kokusho, Toyoaki Suzuki, Takehiko Wada, Naoki Isobe, Jungmi Kwon, Hideo Matsuhara, Koichi Nagase, Takao Nakagawa, Takafumi Ootsubo, Mitsuyoshi Yamagishi, Itsuki Sakon, Kohji Tsumura, Hiroshi Shibai, Mitsunobu Kawada, Hidehiro Kaneda, Takuya Furuta, takurou Tsuchikawa
    Space Telescopes and Instrumentation 2018: Optical, Infrared, and Millimeter Wave 2018年7月12日  
  • Munetaka Ueno, Yuichiro Ezoe, Yoshizumi Miyoshi, Satoshi Kasahara, Tomoki Kimura, Kumi Ishikawa, Masaki Fujimoto, Kazuhisa Mitsuda, Hironori Sahara, Naoki Isobe, Hiroshi Nakajima, Takaya Ohashi, Haruki Nagata, Graziella Branduardi-Raymont, Ryu Funase
    Space Telescopes and Instrumentation 2018: Ultraviolet to Gamma Ray 10699 2018年7月6日  
  • Hiroshi Nakajima, Satomi Onishi, Jun-ichi Iwagaki, Junko S. Hiraga, John P. Doty, Hirokazu Ikeda, Yuichiro Ezoe, Naoki Isobe, Hironori Sahara
    Space Telescopes and Instrumentation 2018: Ultraviolet to Gamma Ray 2018年7月6日  
  • Baba Shunsuke, Nakagawa Takao, Isobe Naoki, Shirahata Mai
    宇宙航空研究開発機構特別資料 = JAXA Special Publication: The Cosmic Wheel and the Legacy of the AKARI archive: from galaxies and stars to planets and life (17) 217-220 2018年3月9日  
    第4回「あかり」国際会議 (2017年10月17-20日. 東京大学), 文京区, 東京形態: カラー図版あり資料番号: AA1730026036レポート番号: JAXA-SP-17-009E 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, JapanWe analyzed the 4.67 micrometers CO ro-vibrational absorption band in nearby ten active galactic nuclei (AGNs) observed with AKARI and Spitzer by fitting a plane-parallel local thermal equilibrium gas model. We found that the CO gas is warm (200-500 K) with a large column density (N(sub H) less than in the order of 10(exp 23) cm-2). Such a large column of warm gas is not achievable with UV heating or shock heating in starbursts. The most convincing heating source is X-ray photons emitted from the nuclei, which can produce warm gas of N(sub H) in the order of 10(exp 24) cm-2. This indicates that the region probed by the CO absorption is in the vicinity of the nuclei. The hydrogen column density estimated from the CO band is smaller than that inferred from X-ray observations. The observed deep absorption implies that the gas is close to the continuum source. We suggest that the probed region is outside the X-ray emitting region and just in front of the dust sublimation layer, which can be designated as the inner rim of the obscuring material around the AGNs.Physical characteristics: Original contains color illustrations
  • Yano Kenichi, Nakagawa Takao, Isobe Naoki, Shirahata Mai
    宇宙航空研究開発機構特別資料 = JAXA Special Publication: Proceedings of the SPICA Science Conference from Exoplanets to Distant Galaxies: SPICA's New Window on the Cool Universe (17) 117-119 2018年3月9日  
    形態: カラー図版あり資料番号: AA1730027026レポート番号: JAXA-SP-17-010E SPICA Science Conference from Exoplanets to Distant Galaxies: SPICA's New Window on the Cool Universe (June 18-21, 2013. Ito Hall, the University of Tokyo), Bunkyou-ku, Tokyo, JapanWe carried out systematic observations of the HI recombination line Bra (4.05 μm) in nearby (z less than 0.3) ultraluminous infrared galaxies (ULIRGs), using AKARI near-infrared 2.5-5.0 μm spectroscopy. We derived star formation rates (SFRs) from the Bra line, whose observed flux is predicted to be the highest among HI recombination lines in conditions with large dust extinction (visual extinction Av greater than 15 mag) expected in ULIRGs. Using the 3.3 μm polycyclic aromatic hydrocarbon emission in addition to the Bra line as an indicator of the SFR, we estimated the contribution of the star formation to the total infrared luminosity in 51 ULIRGs. The contribution was on average 28 plus or minus4 0/o in ULIRGs optically classified as H II, while 14 plus or minus2 0/o in ULIRGs optically classified as LINER or Seyfert. This result indicates that the star formation is significantly active in H II ULIRGs and other energy source, i.e. active galactic nuclei, is needed in LINER ULIRGs.Physical characteristics: Original contains color illustrations
  • Yano Kenichi, Nakagawa Takao, Isobe Naoki, Shirahata Mai, Baba Shunsuke, Doi Ryosuke
    宇宙航空研究開発機構特別資料 = JAXA Special Publication: The Cosmic Wheel and the Legacy of the AKARI archive: from galaxies and stars to planets and life (17) 379-382 2018年3月9日  
    第4回「あかり」国際会議 (2017年10月17-20日. 東京大学), 文京区, 東京形態: カラー図版あり資料番号: AA1730026077レポート番号: JAXA-SP-17-009E 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, JapanWe made systematic observations of the HI Br alpha (4.05 micrometers) and Br beta (2.63 micrometers) lines in 52 nearby (z less than 0.3) ULIRGs with AKARI. Our observations show that ULIRGs have a tendency to indicate higher Br beta/Br alpha line ratios than those observed in Galactic HII regions, and three galaxies in the observed sample show the anomaly of the Br beta/Br alpha line ratios (in the order of 1.0), which are significantly higher than that of case B (0.565). The high Br beta/Br alpha line ratios cannot be explained by the combination of the dust extinction and the case B, since dust extinction reduces the ratio. We simulate HII regions in the ULIRGs with the Cloudy code, and show that the high Br beta/Br alpha line ratios can be explained with the combination of the optically thick Br alpha line and the optically thin Br beta line. To achieve the column density large enough to make the Br alpha line optically thick, the gas density is required as high as n in the order of 10(exp 8) cm(exp -3). Hence our results suggest that star-formation activity in ULIRGs occurs preferentially in high-density clouds.Physical characteristics: Original contains color illustrations
  • 道井 亮介, 中川 貴雄, 磯部 直樹, 馬場 俊介, 矢野 健一, 山岸 光義, Doi Ryosuke, Nakagawa Takao, Isobe Naoki, Baba Shunsuke, Yano Kenichi, Yamagishi Mitsuyoshi
    宇宙航空研究開発機構特別資料 = JAXA Special Publication: The Cosmic Wheel and the Legacy of the AKARI archive: from galaxies and stars to planets and life (17) 325-327 2018年3月9日  
    第4回「あかり」国際会議 (2017年10月17-20日. 東京大学), 文京区, 東京形態: カラー図版あり資料番号: AA1730026063レポート番号: JAXA-SP-17-009E
  • 磯部直樹, 小山翔子, 紀基樹, 新沼浩太郎, 和田武彦, 中川貴雄, 松原英雄
    日本天文学会年会講演予稿集 2017 2017年  
  • K. Matsuta, P. Gandhi, T. Dotani, T. Nakagawa, N. Isobe, Y. Ueda, K. Ichikawa, Y. Terashima, S. Oyabu, I. Yamamura, Stawarz
    Astrophysical Journal 753(2) 2012年7月10日  
  • Hiroshi Tomida, Hiroshi Tsunemi, Masashi Kimura, Hiroki Kitayama, Masaru Matsuoka, Shiro Ueno, Kazuyoshi Kawasaki, Haruyoshi Katayama, Kazuhisa Miyaguchi, Kentaro Maeda, Arata Daikyuji, Naoki Isobe
    PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN 63(2) 397-405 2011年4月  
  • Tadayuki Takahashi, Kazuhisa Mitsuda, Richard Kelley, Felix Aharonian, Fumie Akimoto, Steve Allen, Naohisa Anabuki, Lorella Angelini, Keith Arnaud, Hisamitsu Awaki, Aya Bamba, Nobutaka Bando, Mark Bautz, Roger Blandford, Kevin Boyce, Greg Brown, Maria Chernyakova, Paolo Coppi, Elisa Costantini, Jean Cottam, John Crow, Jelle de Plaa, Cor de Vries, Jan-Willem den Herder, Michael DiPirro, Chris Done, Tadayasu Dotani, Ken Ebisawa, Teruaki Enoto, Yuichiro Ezoe, Andrew Fabian, Ryuichi Fujimoto, Yasushi Fukazawa, Stefan Funk, Akihiro Furuzawa, Massimiliano Galeazzi, Poshak Gandhi, Keith Gendreau, Kirk Gilmore, Yoshito Haba, Kenji Hamaguchi, Isamu Hatsukade, Kiyoshi Hayashida, J. Hiraga, Kazuyuki Hirose, Ann Hornschemeier, John Hughes, Una Hwang, Ryo Iizuka, Kazunori Ishibashi, Manabu Ishida, Kosei Ishimura, Yoshitaka Ishisaki, Naoki Isobe, Masayuki Ito, Naoko Iwata, Jelle Kaastra, Timothy Kallman, Tuneyoshi Kamae, Hideaki Katagiri, Jun Kataoka, Satoru Katsuda, Madoka Kawaharada, Nobuyuki Kawai, Shigeo Kawasaki, Dmitry Khangaluyan, Caroline Kilbourne, Kenzo Kinugasa, Shunji Kitamoto, Tetsu Kitayama, Takayoshi Kohmura, Motohide Kokubun, Tatsuro Kosaka, Taro Kotani, Katsuji Koyama, Aya Kubota, Hideyo Kunieda, Philippe Laurent, Francois Lebrun, Olivier Limousin, Michael Loewenstein, Knox Long, Grzegorz Madejski, Yoshitomo Maeda, Kazuo Makishima, Maxim Markevitch, Hironori Matsumoto, Kyoko Matsushita, Dan McCammon, Jon Miller, Shin Mineshige, Kenji Minesugi, Takuya Miyazawa, Tsunefumi Mizuno, Koji Mori, Hideyuki Mori, Koji Mukai, Hiroshi Murakami, Toshio Murakami, Richard Mushotzky, Yujin Nakagawa, Takao Nakagawa, Hiroshi Nakajima, Takeshi Nakamori, Kazuhiro Nakazawa, Yoshiharu Namba, Masaharu Nomachi, Steve O' Dell, Hiroyuki Ogawa, Mina Ogawa, Keiji Ogi, Takaya Ohashi, Masanori Ohno, Masayuki Ohta, Takashi Okajima, Naomi Ota, Masanobu Ozaki, Frits Paerels, Stephane Paltani, Arvind Parmer, Robert Petre, Martin Pohl, Scott Porter, Brian Ramsey, Christopher Reynolds, Shin-ichiro Sakai, Rita Sambruna, Goro Sato, Yoichi Sato, Peter Serlemitsos, Maki Shida, Takanobu Shimada, Keisuke Shinozaki, Peter Shirron, Randall Smith, Gary Sneiderman, Yang Soong, Lukasz Stawarz, Hiroyuki Sugita, Andrew Szymkowiak, Hiroyasu Tajima, Hiromitsu Takahashi, Yoh Takei, Toru Tamagawa, Takayuki Tamura, Keisuke Tamura, Takaaki Tanaka, Yasuo Tanaka, Yasuyuki Tanaka, Makoto Tashiro, Yuzuru Tawara, Yukikatsu Terada, Yuichi Terashima, Francesco Tombesi, Hiroshi Tomida, Miyako Tozuka, Yoko Tsuboi, Masahiro Tsujimoto, Hiroshi Tsunemi, Takeshi Tsuru, Hiroyuki Uchida, Yasunobu Uchiyama, Hideki Uchiyama, Yoshihiro Ueda, Shinichiro Uno, Meg Urry, Shin Watanabe, Nicholas White, Takahiro Yamada, Hiroya Yamaguchi, Kazutaka Yamaoka, Noriko Yamasaki, Makoto Yamauchi, Shigeo Yamauchi, Yoichi Yatsu, Daisuke Yonetoku, Atsumasa Yoshida
    SPACE TELESCOPES AND INSTRUMENTATION 2010: ULTRAVIOLET TO GAMMA RAY 7732 77320Z-77320Z-18 2010年  
  • Naoki Isobe, Makoto S. Tashiro, Poshak Gandhi, Asami Hayato, Hiroshi Nagai, Kazuhiro Hada, Hiromi Seta, Keiko Matsuta
    ASTROPHYSICAL JOURNAL 706(1) 454-463 2009年11月  
  • Makoto S. Tashiro, Naoki Isobe, Hiromi Seta, Keiko Matsuta, Yuichi Yaji
    PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN 61 S327-S335 2009年1月  
  • Naomi Kawano, Yasushi Fukazawa, Sho Nishino, Kazuhiro Nakazawa, Takao Kitaguchi, Kazuo Makishima, Tadayuki Takahashi, Motohide Kokubun, Naomi Ota, Takaya Ohashi, Naoki Isobe, J. Patrick Henry, Ann Hornschemeier
    PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN 61 S377-S386 2009年1月  
  • Kazuyo Tokoi, Kosuke Sato, Yoshitaka Ishisaki, Takaya Ohashi, Noriko Y. Yamasaki, Kazuhiro Nakazawa, Kyoko Matsushita, Yasushi Fukazawa, Akio Hoshino, Takayuki Tamura, Chihiro Egawa, Naomi Kawano, Naomi Ota, Naoki Isobe, Madoka Kawaharada, Hisamitsu Awaki, John P. Hughes
    PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN 60 S317-S331 2008年2月  
  • Mizuno Tsunefumi, Miyawaki Ryohei, Ebisawa Ken, KUBOTA Aya, MIYAMOTO Masao, WINTER Lisa M., UEDA Yoshihiro, ISOBE Naoki, DEWANGAN Gulab C., DONE Chris, GRIFFITHS Richard E., HABA Yoshito, KOKUBUN Motohide, KOTOKU Jun'ichi, MAKISHIMA Kazuo, MATSUSHITA Kyoko, MUSHOTZKY Richard F., NAMIKI Masaaki, PETRE Robert, TAKAHASHI Hiromitsu, TAMAGAWA Toru, TERASHIMA Yuichi
    PASJ : publications of the Astronomical Society of Japan 59(1) S257-S267 2007年1月31日  
    Two ultraluminous X-ray sources (ULXs) in the nearby Sb galaxy NGC 1313, named X-1 and X-2, were observed with Suzaku on 2005 September 15. During the observation for a net exposure of 28 ks (but over a gross time span of 90 ks), both objects varied in intensity by about 50%. The 0.4–10 keV X-ray luminosities of X-1 and X-2 were measured as 2.5×1040 ergs-1 and 5.8×1039 ergs-1, respectively, with the former exhibiting the highest ever reported for this ULX. The spectrum of X-1 can be explained by the sum of a strong and variable powerlaw component with a high-energy cutoff, and a stable multicolor blackbody with an innermost disk temperature of ∼ 0.2keV. These results suggest that X-1 was in a "very high" state, where disk emission is strongly Comptonized. The absorber within NGC 1313 toward X-1 is suggested to have a subsolar oxygen abundance. The spectrum of X-2 is best represented, in its fainter phase, by a multicolor blackbody model with an innermost disk temperature of 1.2–1.3 keV, and becomes flatter as the source becomes brighter. Hence, X-2 is interpreted to be in a slim-disk state. These results suggest that the two ULXs have black hole masses of some dozens to a few hundred of solar masses.
  • Yukikatsu Terada, Aya Bamba, Junko S. Hiraga, Naoki Isobe, Aya Kubota, Naomi Ota, Piero Ranalli, Atsushi Senda, Motoko Suzuki, Toru Tamagawa, Yuji Urata, Masanobu Ozaki, Ken Ebisawa, Yoshitaka Ishisaki, Hironori Matsumoto, Izumi Yamagishi, Takayuki Tamura, Koji Mukai, Lorella Angellini, Kenji Hamaguchi
    PROGRESS OF THEORETICAL PHYSICS SUPPLEMENT 169(169) 312-315 2007年  
  • Motohide Kokubun, Kazuo Makishima, Tadayuki Takahashi, Toshio Murakami, Makoto Tashiro, Yasushi Fukazawa, Tuneyoshi Kamae, Greg M. Madejski, Kazuhiro Nakazawa, Kazutaka Yamaoka, Yukikatsu Terada, Daisuke Yonetoku, Shin Watanabe, Toru Tamagawa, Tsunefumi Mizuno, Aya Kubota, Naoki Isobe, Isao Takahashi, Goro Sato, Hiromitsu Takahashi, Soojing Hong, Madoka Kawaharada, Naomi Kawano, Takefumi Mitani, Mio Murashima, Masaya Suzuki, Keiichi Abe, Ryouhei Miyawaki, Masanori Ohno, Takaaki Tanaka, Takayuki Yanagida, Takeshi Itoh, Kousuke Ohnuki, Ken-ichi Tamura, Yasuhiko Endo, Shinya Hirakuri, Tatsuro Hiruta, Takao Kitaguchi, Tetsuichi Kishishita, Satoshi Sugita, Takuya Takahashi, Shin'ichiro Takeda, Teruaki Enoto, Ayumi Hirasawa, Jun'ichiro Katsuta, Satoshi Matsumura, Kaori Onda, Mitsuhiro Sato, Masayoshi Ushio, Shin-nosuke Ishikawa, Koichi Murase, Hirokazu Odaka, Masanobu Suzuki, Yuichi Yaji, Shinya Yamada, Tomonori Yamasaki, Takayuki Yuasa
    PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN 59 S53-S76 2007年1月  
  • N. Isobe, K. Makishima, M. Tashiro, K. Itoh, N. Iyomoto, I. Takahashi, H. Kaneda
    ASTROPHYSICAL JOURNAL 645(1) 256-263 2006年7月  
  • M Tashiro, K Ito, K Abe, N Isobe
    PROCEEDINGS OF THE X-RAY UNIVERSE 2005, VOLS 1 AND 2 604 569-+ 2006年  
  • Mikio Morii, Masaru Matsuoka, Shiro Ueno, Hiroshi Tomida, Haruyoshi Katayama, Kazuyoshi Kawasaki, Takao Yokota, Naoyuki Kuramata, Tatehiro Mihara, Mitsuhiro Kohama, Naoki Isobe, Motoki Nakajima, Hiroshi Tsunemi, Emi Miyata, Atsumasa Yoshida, Kazutaka Yamaoka, Yuichiro Tsuchiya, Takehiro Miyakawa, Nobuyuki Kawai, Jun Kataoka, Satoshi Tanaka, Hitoshi Negoro
    Space Telescopes and Instrumentation II: Ultraviolet to Gamma Ray, Pts 1 and 2 6266(No.) U2663-U2663 2006年  

講演・口頭発表等

 24

共同研究・競争的資金等の研究課題

 4

その他

 1
  • 2024年8月
    Project Management Professional (Project Management Institute) の資格を取得