Zobrazeno 1 - 10
of 208
pro vyhledávání: '"Kawaharada, M."'
Autor:
Akamatsu, H., Mizuno, M., Ota, N., Zhang, Y. -Y., van Weeren, R. J., Kawahara, H., Fukazawa, Y., Kaastra, J. S., Kawaharada, M., Nakazawa, K., Ohashi, T., Röttgering, H. J. A., Takizawa, M., Vink, J., Zandanel, F.
Publikováno v:
A&A 600, A100 (2017)
We present the results of deep 140 ks Suzaku X-ray observations of the north-east (NE) radio relic of the merging galaxy cluster Abell2255. The temperature structure of Abell2255 is measured out to 0.9 times the virial radius (1.9 Mpc) in the NE dire
Externí odkaz:
http://arxiv.org/abs/1612.03058
Autor:
Okabe, N., Umetsu, K., Tamura, T., Fujita, Y., Takizawa, M., Matsushita, K., Fukazawa, Y., Futamase, T., Kawaharada, M., Miyazaki, S., Mochizuki, Y., Nakazawa, K., Ohashi, T., Ota, N., Sasaki, T., Sato, K., Tam, S. I.
We perform a weak-lensing study of the nearby cool-core galaxy clusters, Hydra A ($z=0.0538$) and A478 ($z=0.0881$), of which brightest cluster galaxies (BCGs) host powerful activities of active galactic nuclei (AGNs). For each cluster, the observed
Externí odkaz:
http://arxiv.org/abs/1503.04412
Autor:
Kitayama, T., Bautz, M., Markevitch, M., Matsushita, K., Allen, S., Kawaharada, M., McNamara, B., Ota, N., Akamatsu, H., de Plaa, J., Galeazzi, M., Madejski, G., Main, R., Miller, E., Nakazawa, K., Russell, H., Sato, K., Sekiya, N., Simionescu, A., Tamura, T., Uchida, Y., Ursino, E., Werner, N., Zhuravleva, I., ZuHone, J.
The next generation X-ray observatory ASTRO-H will open up a new dimension in the study of galaxy clusters by achieving for the first time the spectral resolution required to measure velocities of the intracluster plasma, and extending at the same ti
Externí odkaz:
http://arxiv.org/abs/1412.1176
Universal Profiles of the Intracluster Medium from Suzaku X-Ray and Subaru Weak Lensing Obesrvations
Autor:
Okabe, N., Umetsu, K., Tamura, T., Fujita, Y., Takizawa, M., Zhang, Y. -Y., Matsushita, K., Hamana, T., Fukazawa, Y., Futamase, T., Kawaharada, M., Miyazaki, S., Mochizuki, Y., Nakazawa, K., Ohashi, T., Ota, N., Sasaki, T., Sato, K., Tam, S. I.
We conduct a joint X-ray and weak-lensing study of four relaxed galaxy clusters (Hydra A, A478, A1689 and A1835) observed by both Suzaku and Subaru out to virial radii, with an aim to understand recently-discovered unexpected feature of the ICM in cl
Externí odkaz:
http://arxiv.org/abs/1406.3451
Autor:
Tsuchiya, H., Enoto, T., Iwata, K., Yamada, S., Yuasa, T., Kitaguchi, T., Kawaharada, M., Nakazawa, K., Kokubun, M., Kato, H., Okano, M., Tamagawa, T., Makishima, K.
Publikováno v:
Phys. Rev. Lett. 111, 015001 (2013)
We report the first observation of 3$-$30 MeV prolonged gamma-ray emission that was abruptly terminated by lightning. The gamma-ray detection was made during winter thunderstorms on December 30, 2010 by the Gamma-Ray Observation of Winter THunderclou
Externí odkaz:
http://arxiv.org/abs/1306.2388
Autor:
Akamatsu, H., de Plaa, J., Kaastra, J., Ishisaki, Y., Ohashi, T., Kawaharada, M., Nakazawa, K.
We observed the northwest region of the cluster of galaxies A3667 with the Suzaku XIS instrument. The temperature and surface brightness of the intracluster medium were measured up to the virial radius (r200-2.3 Mpc). The radial temperature profile i
Externí odkaz:
http://arxiv.org/abs/1111.5162
Autor:
Tsuchiya, H., Enoto, T., Yamada, S., Yuasa, T., Nakazawa, K., Kitaguchi, T., Kawaharada, M., Kokubun, M., Kato, H., Okano, M., Makishima, K.
The Gamma-Ray Observation of Winter THunderclouds (GROWTH) experiment, consisting of two radiation-detection subsystems, has been operating since 2006 on the premises of Kashiwazaki-Kariwa nuclear power plant located at the coastal area of Japan Sea.
Externí odkaz:
http://arxiv.org/abs/1102.4024
Autor:
Takahashi, I., Kawaharada, M., Makishima, K., Matsushita, K., Fukazawa, Y., Ikebe, Y., Kitaguchi, T., Kokubun, M., Nakazawa, K., Okuyama, S., Ota, N., Tamura, T.
Publikováno v:
Astrophys.J.701:377-395,2009
X-ray data of the Centaurus cluster, obtained with {\it XMM-Newton} for 45 ksec, were analyzed. Deprojected EPIC spectra from concentric thin shell regions were reproduced equally well by a single-phase plasma emission model, or by a two-phase model
Externí odkaz:
http://arxiv.org/abs/0907.1468
Autor:
Tsuchiya, H., Enoto, T., Yamada, S., Yuasa, T., Kawaharada, M., Kitaguchi, T., Kokubun, M., Kato, H., Okano, M., Nakamura, S., Makishima, K.
Publikováno v:
Phys.Rev.Lett.99:165002,2007
A report is made on a comprehensive observation of a burst-like $\gamma$-ray emission from thunderclouds on the Sea of Japan, during strong thunderstorms on 2007 January 6. The detected emission, lasting for $\sim$40 seconds, preceded cloud-to-ground
Externí odkaz:
http://arxiv.org/abs/0708.2947
Autor:
Kokubun, M., Makishima, K., Takahashi, T., Murakami, T., Tashiro, M., Fukazawa, Y., Kamae, T., Madejski, G. M., Nakazawa, K., Yamaoka, K., Terada, Y., Yonetoku, D., Watanabe, S., Tamagawa, T., Mizuno, T., Kubota, A., Isobe, N., Takahashi, I., Sato, G., Takahashi, H., Hong, S., Kawaharada, M., Kawano, N., Mitani, T., Murashima, M., Suzuki, M., Abe, K., Miyawaki, R., Ohno, M., Tanaka, T., Yanagida, T., Itoh, T., Ohnuki, K., Tamura, K., Endo, Y., Hirakuri, S., Hiruta, T., Kitaguchi, T., Kishishita, T., Sugita, S., Takeda, S., Enoto, T., Hirasawa, A., Katsuta, J., Matsumura, S., Onda, K., Sato, M., Ushio, M., Ishikawa, S., Murase, K., Odaka, H., Yaji, Y., Yamada, S., Yamasaki, T., Yuasa, T.
Publikováno v:
Publ.Astron.Soc.Jap.59:53-76,2007
The in-orbit performance and calibration of the Hard X-ray Detector (HXD) on board the X-ray astronomy satellite Suzaku are described. Its basic performances, including a wide energy bandpass of 10-600 keV, energy resolutions of ~4 keV (FWHM) at 40 k
Externí odkaz:
http://arxiv.org/abs/astro-ph/0611233