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449 results on '"Kitamoto, S"'

52. Discovery of a long-term periodic variation in LMC X-3

Author

Cowley, A. P, Schmidtke, P. C, Ebisawa, K, Makino, F, Remillard, R. A, Crampton, D, Hutchings, J. B, Kitamoto, S, and Treves, A

Subjects
Astronomy
Abstract

The highly variable X-ray luminosity of LMC X-3 is found to be strongly modulated with a period of about 198 (or possibly about 99) days. Observations from satellites show this periodic variation. For energies of less than 13 keV, the X-ray intensity and hardness are positively correlated; for higher energies, there appears to be no correlation. Available optical photometry indicates the mean V brightness also varies by more than 1 mag with this same long-term period. The regularity of this 'clock' in LMC X-3 suggests that it may be related to an accretion-disk precession, similar to that seen in LMC X-4, Her X-1, SS 433, or possibly periodic variations in the mass-transfer rate.

Published
1991
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57. The quiescent intracluster medium in the core of the Perseus cluster

Author

Aharonian, F, Akamatsu, H, Akimoto, F, Allen, SW, Anabuki, N, Angelini, L, Arnaud, K, Audard, M, Awaki, H, Axelsson, M, Bamba, A, Bautz, M, Blandford, R, Brenneman, L, Brown, GV, Bulbul, E, Cackett, E, Chernyakova, M, Chiao, M, Coppi, P, Costantini, E, De Plaa, J, Den Herder, JW, Done, C, Dotani, T, Ebisawa, K, Eckart, M, Enoto, T, Ezoe, Y, Fabian, AC, Ferrigno, C, Foster, A, Fujimoto, R, Fukazawa, Y, Furuzawa, A, Galeazzi, M, Gallo, L, Gandhi, P, Giustini, M, Goldwurm, A, Gu, L, Guainazzi, M, Haba, Y, Hagino, K, Hamaguchi, K, Harrus, I, Hatsukade, I, Hayashi, K, Hayashi, T, Hayashida, K, Hiraga, J, Hornschemeier, A, Hoshino, A, Hughes, J, Iizuka, R, Inoue, H, Inoue, Y, Ishibashi, K, Ishida, M, Ishikawa, K, Ishisaki, Y, Itoh, M, Iyomoto, N, Kaastra, J, Kallman, T, Kamae, T, Kara, E, Kataoka, J, Katsuda, S, Katsuta, J, Kawaharada, M, Kawai, N, Kelley, R, Khangulyan, D, Kilbourne, C, King, A, Kitaguchi, T, Kitamoto, S, Kitayama, T, Kohmura, T, Kokubun, M, Koyama, S, Koyama, K, Kretschmar, P, Krimm, H, Kubota, A, Kunieda, H, Laurent, P, Fabian, Andrew [0000-0002-9378-4072], and Apollo - University of Cambridge Repository

Subjects
Astrophysics::High Energy Astrophysical Phenomena, Astrophysics::Cosmology and Extragalactic Astrophysics, Hitomi Collaboration, Astrophysics::Galaxy Astrophysics
Abstract

Clusters of galaxies are the most massive gravitationally bound objects in the Universe and are still forming. They are thus important probes of cosmological parameters and many astrophysical processes. However, knowledge of the dynamics of the pervasive hot gas, the mass of which is much larger than the combined mass of all the stars in the cluster, is lacking. Such knowledge would enable insights into the injection of mechanical energy by the central supermassive black hole and the use of hydrostatic equilibrium for determining cluster masses. X-rays from the core of the Perseus cluster are emitted by the 50-million-kelvin diffuse hot plasma filling its gravitational potential well. The active galactic nucleus of the central galaxy NGC 1275 is pumping jetted energy into the surrounding intracluster medium, creating buoyant bubbles filled with relativistic plasma. These bubbles probably induce motions in the intracluster medium and heat the inner gas, preventing runaway radiative cooling - a process known as active galactic nucleus feedback. Here we report X-ray observations of the core of the Perseus cluster, which reveal a remarkably quiescent atmosphere in which the gas has a line-of-sight velocity dispersion of 164 ± 10 kilometres per second in the region 30-60 kiloparsecs from the central nucleus. A gradient in the line-of-sight velocity of 150 ± 70 kilometres per second is found across the 60-kiloparsec image of the cluster core. Turbulent pressure support in the gas is four per cent of the thermodynamic pressure, with large-scale shear at most doubling this estimate. We infer that a total cluster mass determined from hydrostatic equilibrium in a central region would require little correction for turbulent pressure., Please visit the publisher's website for funding information.

Published
2016

58. New observations of the cyclotron absorption feature in Hercules X-1

Author

Mihara, T., Makishima, K., Ohashi, T., Sakao, T., Tashiro, M., Nagase, F., Tanaka, Y., Kitamoto, S., Miyamoto, S., Deeter, J.E., and Boynton, P.E.

Subjects
Cyclotron resonance -- Research, Neutron stars -- Research, Stars -- Magnetic fields, Environmental issues, Science and technology, Zoology and wildlife conservation
Published
1990

59. Cluster of differentiation 43 deficiency in leukocytes leads to reduced atherosclerosis - Brief report

Author

Meiler S., Baumer Y., McCurdy S., Lee B., Kitamoto S., and Boisvert W.

Subjects
immune system diseases, hemic and lymphatic diseases, hemic and immune systems, atherosclerosis, macrophages
Abstract

© 2014 American Heart Association, Inc. OBJECTIVE - : The aim of this study was to investigate the role of cluster of differentiation 43 (CD43), an integral membrane glycoprotein with both proadhesive and antiadhesive activities, in atherosclerosis. APPROACH AND RESULTS - : Low-density lipoprotein receptor-deficient mice were lethally irradiated and reconstituted with either bone marrow from CD43 mice or from wild-type controls. We found that mice lacking the CD43 on their leukocytes had significantly less severe atherosclerosis and that, contrary to our expectation, macrophage infiltration into the vessel wall was not affected by the lack of CD43 in the leukocytes. However, we found that CD43 mediates cholesterol homeostasis in macrophages by facilitating cholesterol efflux. This resulted in a significant reduction in storage of cholesterol in the aorta of mice lacking CD43 in the leukocytes. CONCLUSIONS - : CD43 may be an important mediator of macrophage lipid homeostasis, thereby affecting macrophage foam cell formation and ultimately atherosclerotic plaque development.

Published
2015

60. X-ray and γ-ray PolarimetrySatellite PolariS

Author

Hayashida, K., Gunji, S., Yonetoku, D., Mihara, T., Tamagawa, T., Mizuno, T., Takahashi, H., Furuzawa, A., Dotani, T., Kishimoto, Y., Kubo, H., Jahoda, Keith, Hill, Joe, Anabuki, N., Tsunemi, H., Toma, K., Nakamori, T., Tokanai, F., Shibata, S., Sakurai, T., Murakami, T., A. , Hayato, Sakurai, I., Tamura, K., Saito, Y., Yatsu, Y., Kataoka, J., Kitamoto, S., Tanimori, T., Tanaka, T., Miuchi, K., Kawaguchi, T., Ogasaka, Y., Sadamoto, M., Yoshinaga, K., Kamitsukasa, F., Ide, S., Juyong, K., Sakano, M., Katagiri, J., Sugimoto, J., Takagi, T., 林田 清, 郡司, 修一, 米徳, 大輔, 三原, 建広, 玉川, 徹, 水野, 恒史, 高橋, 弘充, 古澤, 彰浩, 堂谷, 忠靖, 岸本, 祐二, 窪, 秀利, 穴吹, 直久, 常深, 博, 當真, 賢二, 中森, 健之, 門叶, 冬樹, 柴田, 晋平, 斎藤, 芳隆, 谷津, 陽一, 定本, 真明, 吉永, 圭吾, 上司, 文善, 井出, 舜一郎, Juyong, Kim, 坂野, 光成, 片桐, 惇, 杉本, 樹梨, 高木, 利紘, Hayashida, K., Gunji, S., Yonetoku, D., Mihara, T., Tamagawa, T., Mizuno, T., Takahashi, H., Furuzawa, A., Dotani, T., Kishimoto, Y., Kubo, H., Jahoda, Keith, Hill, Joe, Anabuki, N., Tsunemi, H., Toma, K., Nakamori, T., Tokanai, F., Shibata, S., Sakurai, T., Murakami, T., A. , Hayato, Sakurai, I., Tamura, K., Saito, Y., Yatsu, Y., Kataoka, J., Kitamoto, S., Tanimori, T., Tanaka, T., Miuchi, K., Kawaguchi, T., Ogasaka, Y., Sadamoto, M., Yoshinaga, K., Kamitsukasa, F., Ide, S., Juyong, K., Sakano, M., Katagiri, J., Sugimoto, J., Takagi, T., 林田 清, 郡司, 修一, 米徳, 大輔, 三原, 建広, 玉川, 徹, 水野, 恒史, 高橋, 弘充, 古澤, 彰浩, 堂谷, 忠靖, 岸本, 祐二, 窪, 秀利, 穴吹, 直久, 常深, 博, 當真, 賢二, 中森, 健之, 門叶, 冬樹, 柴田, 晋平, 斎藤, 芳隆, 谷津, 陽一, 定本, 真明, 吉永, 圭吾, 上司, 文善, 井出, 舜一郎, Juyong, Kim, 坂野, 光成, 片桐, 惇, 杉本, 樹梨, and 高木, 利紘

Abstract

会議情報: 第14回宇宙科学シンポジウム (2014年1月9日-10日. 宇宙航空研究開発機構宇宙科学研究所(JAXA)(ISAS)相模原キャンパス), 相模原市, 神奈川県, 著者人数: 42名, Meeting Information: 14ｔh Space Science Symposium (January 9-10, 2014. Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency(JAXA)(ISAS)Sagamihara Campus), Sagamihara, Kanagawa Japan

Published
2016

62. X-ray and γ-ray PolarimetrySatellite PolariS

Author

Jahoda, Keith, Hill, Joe, Juyong, Kim, Hayashida, K., Gunji, S., Yonetoku, D., Mihara, T., Tamagawa, T., Mizuno, T., Takahashi, H., Furuzawa, A., Dotani, T., Kishimoto, Y., Kubo, H., Anabuki, N., Tsunemi, H., Toma, K., Nakamori, T., Tokanai, F., Shibata, S., Sakurai, T., Murakami, T., A., Hayato, Sakurai, I., Tamura, K., Saito, Y., Yatsu, Y., Kataoka, J., Kitamoto, S., Tanimori, T., Tanaka, T., Miuchi, K., Kawaguchi, T., Ogasaka, Y., Sadamoto, M., Yoshinaga, K., Kamitsukasa, F., Ide, S., Juyong, K., Sakano, M., Katagiri, J., Sugimoto, J., and Takagi, T.

Abstract

第14回宇宙科学シンポジウム (2014年1月9日-10日. 宇宙航空研究開発機構宇宙科学研究所(JAXA)(ISAS)相模原キャンパス), 相模原市, 神奈川県, 14ｔh Space Science Symposium (January 9-10, 2014. Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency(JAXA)(ISAS)Sagamihara Campus), Sagamihara, Kanagawa Japan, 著者人数: 42名, 資料番号: SA6000058066, レポート番号: P2-034

Published
2014

69. Rapid X-ray variability in GRO J0422+23

Author

van der Hooft, F., Kouveliotou, C., van Paradijs, J.A., Crary, D.J., Rubin, B.C., Finger, M.H., Harmon, B.A., van der Klis, M., Lewin, W.H.G., Fishman, G.J., Kitamoto, S., Koyama, K., Itoh, M., and High Energy Astrophys. & Astropart. Phys (API, FNWI)

Published
1998

82. EUV imaging experiment of an adaptive optics telescope

Author

Kitamoto, S., primary, Shibata, T., additional, Takenaka, E., additional, Yoshida, M., additional, Murakami, H., additional, Shishido, Y., additional, Gotoh, N., additional, Nagasaki, K., additional, Takei, D., additional, and Morii, M., additional

Published
2009
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84. SWIFTX-RAY AND ULTRAVIOLET MONITORING OF THE CLASSICAL NOVA V458 VUL (NOVA VUL 2007)

Author

Ness, J.-U., primary, Drake, J. J., additional, Beardmore, A. P., additional, Boyd, D., additional, Bode, M. F., additional, Brady, S., additional, Evans, P. A., additional, Gaensicke, B. T., additional, Kitamoto, S., additional, Knigge, C., additional, Miller, I., additional, Osborne, J. P., additional, Page, K. L., additional, Rodriguez-Gil, P., additional, Schwarz, G., additional, Staels, B., additional, Steeghs, D., additional, Takei, D., additional, Tsujimoto, M., additional, Wesson, R., additional, and Zijlstra, A., additional

Published
2009
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85. Transient dips of Cygnus X-1 observed from Tenma

Author

Kitamoto, S, Miyamoto, S, Tanaka, Y, Ohashi, T, Kondo, Y, Tawara, Y, and Nakagawa, M

Subjects
Astronomy
Abstract

The transient intensity dips of the binary system Cyg X-1 have been observed, using the gas scintillation proportional counter (GSPC) array onboard the Tenma X-ray astronomy satellite. The duration of the dips was in the range from several seconds to 10 minutes, with several dips occurring as much as 15 h before the superior conjunction. Within the dips, complex structures were observed with time scales of several seconds, and, in at least one case, shorter than two seconds. For a dip lasting longer than 10 minutes, a high-quality spectrum was obtained which reveals the K-absorption edge of iron at 7.18 + or - 0.18 keV. On the basis of the observed absorption, it is suggested that the dips are caused by absorption due to relatively cool matter (less than about 30,000 k); the low-energy excess observed during the dips is due either to an extended soft X-ray emitting corona or to partial obscuration of the X-ray source by multiple blobs. From the time structure of the dip, a blob size of the order of 10 to the 9th cm is derived.

Published
1984

87. Design of the two-stage series adiabatic demagnetization refrigerator for the NeXT and Spectrum-RG missions

Author

Shinozaki, K., primary, Mitsuda, K., additional, Yamasaki, N. Y., additional, Takei, Y., additional, DiPirro, M., additional, Ezoe, Y., additional, Fujimoto, R., additional, den Herder, J. W., additional, Hirabayashi, M., additional, Ishisaki, Y., additional, Kanao, K., additional, Kawaharada, M., additional, Kelley, R., additional, Kilbourne, C., additional, Kitamoto, S., additional, McCammon, D., additional, Mihara, T., additional, Murakami, M., additional, Nakagawa, T., additional, Ohashi, T., additional, Porter, F. S., additional, Satoh, Y., additional, Shirron, P., additional, Sugita, H., additional, Tamagawa, T., additional, Tashiro, M., additional, and Yoshida, S., additional

Published
2008
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88. Broadband X‐Ray Spectroscopy of A0535+262 withSuzaku

Author

Naik, S., primary, Dotani, T., additional, Terada, Y., additional, Nakajima, M., additional, Mihara, T., additional, Suzuki, M., additional, Makishima, K., additional, Sudoh, K., additional, Kitamoto, S., additional, Nagase, F., additional, Enoto, T., additional, and Takahashi, H., additional

Published
2008
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89. Suzaku Observation of AXP 1E 1841-045 in SNR Kes 73

Author

Morii, M., primary, Kitamoto, S., additional, Shibazaki, N., additional, Takei, D., additional, Kawai, N., additional, Arimoto, M., additional, Ueno, M., additional, Terada, Y., additional, Kohmura, T., additional, Yamauchi, S., additional, Bassa, C., additional, Wang, Z., additional, Cumming, A., additional, and Kaspi, V. M., additional

Published
2008
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91. In-flight status of the X-ray observatory Suzaku

Author

Dotani, T., primary, Mitsuda, K., additional, Bautz, M., additional, Inoue, H., additional, Kelley, R. L., additional, Koyama, K., additional, Kunieda, H., additional, Makishima, K., additional, Ogawara, Y., additional, Petre, R., additional, Takahashi, T., additional, Tsunemi, H., additional, White, N. E., additional, Anabuki, N., additional, Angelini, L., additional, Arnaud, K., additional, Awaki, H., additional, Bamba, A., additional, Boyce, K., additional, Brown, G. V., additional, Chan, K.-W., additional, Cottam, J., additional, Doty, J., additional, Ebisawa, K., additional, Ezoe, Y., additional, Fabian, A. C., additional, Figueroa, E., additional, Fujimoto, R., additional, Fukazawa, Y., additional, Furusho, T., additional, Furuzawa, A., additional, Gendreau, K., additional, Griffiths, R. E., additional, Haba, Y., additional, Hamaguchi, K., additional, Harrus, I., additional, Hasinger, G., additional, Hatsukade, I., additional, Hayashida, K., additional, Henry, P. J., additional, Hiraga, J. S., additional, Holt, S. S., additional, Hornschemeier, A., additional, Hughes, J. P., additional, Hwang, U., additional, Ishida, M., additional, Ishisaki, Y., additional, Isobe, N., additional, Itoh, M., additional, Iyomoto, N., additional, Kahn, S. M., additional, Kamae, T., additional, Katagiri, H., additional, Kataoka, J., additional, Katayama, H., additional, Kawai, N., additional, Kawaharada, M., additional, Kilbourne, C., additional, Kinugasa, K., additional, Kissel, S., additional, Kitamoto, S., additional, Kohama, M., additional, Kohmura, T., additional, Kokubun, M., additional, Kotani, T., additional, Kotoku, J., additional, Kubota, A., additional, Madejski, G. M., additional, Maeda, Y., additional, Makino, F., additional, Markowitz, A., additional, Matsumoto, C., additional, Matsumoto, H., additional, Matsuoka, M., additional, Matsushita, K., additional, McCammon, D., additional, Mihara, T., additional, Misaki, K., additional, Miyata, E., additional, Mizuno, T., additional, Mori, K., additional, Mori, H., additional, Morii, M., additional, Moseley, H., additional, Mukai, K., additional, Murakami, H., additional, Murakami, T., additional, Mushotzky, R., additional, Nagase, F., additional, Namiki, M., additional, Negoro, H., additional, Nakazawa, K., additional, Nousek, J. A., additional, Okajima, T., additional, Ogasaka, Y., additional, Ohashi, T., additional, Oshima, T., additional, Ota, N., additional, Ozaki, M., additional, Ozawa, H., additional, Parmar, A. N., additional, Pence, W. D., additional, Porter, F. Scott, additional, Reeves, J. N., additional, Ricker, G. R., additional, Sakurai, I., additional, Sanders, W. T., additional, Senda, A., additional, Serlemitsos, P., additional, Shibata, R., additional, Shinozaki, K., additional, Soong, Y., additional, Smith, R., additional, Suzuki, M., additional, Szymkowiak, A. E., additional, Takahashi, H., additional, Takei, Y., additional, Tamagawa, T., additional, Tamura, K., additional, Tamura, T., additional, Tanaka, Y., additional, Tashiro, M., additional, Tawara, Y., additional, Terada, Y., additional, Terashima, Y., additional, Tomida, H., additional, Torii, K., additional, Tsuboi, Y., additional, Tsujimoto, Y., additional, Tsuru, T., additional, Turner, M. J. L., additional, Uchiyama, Y., additional, Ueda, Y., additional, Ueno, S., additional, Ueno, M., additional, Uno, S., additional, Urata, Y., additional, Watanabe, S., additional, Yamamoto, N., additional, Yamaoka, K., additional, Yamasaki, N. Y., additional, Yamashita, K., additional, Yamauchi, M., additional, Yamauchi, S., additional, Yaqoob, T., additional, Yonetoku, D., additional, and Yoshida, A., additional

Published
2007
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92. Cyclotron Resonance Energies at a Low X-Ray Luminosity: A0535+262 Observed with Suzaku

Author

Terada, Y., primary, Mihara, T., additional, Nakajima, M., additional, Suzuki, M., additional, Isobe, N., additional, Makishima, K., additional, Takahashi, H., additional, Enoto, T., additional, Kokubun, M., additional, Kitaguchi, T., additional, Naik, S., additional, Dotani, T., additional, Nagase, F., additional, Tanaka, T., additional, Watanabe, S., additional, Kitamoto, S., additional, Sudoh, K., additional, Yoshida, A., additional, Nakagawa, Y., additional, Sugita, S., additional, Kohmura, T., additional, Kotani, T., additional, Yonetoku, D., additional, Angelini, L., additional, Cottam, J., additional, Mukai, K., additional, Kelley, R., additional, Soong, Y., additional, Bautz, M., additional, Kissel, S., additional, and Doty, J., additional

Published
2006
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