Electrically driven spin excitation in a ferroelectric magnet DyMnO_3 (2007)
Kida, N., Ikebe, Y., Takahashi, Y., He, J. P., Kaneko, Y., Yamasaki, Y., ...
Temperature (5--250 K) and magnetic field (0--70 kOe) variations of the low-energy (1--10 meV) electrodynamics of spin excitations have been investigated for a complete set of light-polarization...
Statistics of X-ray observables for the cooling-core and non-cooling core galaxy clusters (2007)
Chen, Y., Reiprich, T. H., Böhringer, H., Ikebe, Y.
We present a statistical study of the occurrence and effects of the cooling cores in the clusters of galaxies in a flux-limited sample, HIFLUGCS, based on ROSAT and ASCA observations. About 49% of...
Statistics of X-ray observables for the cooling-core and non-cooling core galaxy clusters (2007)
Chen, Y., Reiprich, T. H., Böhringer, H., Ikebe, Y., Zhang, Y. Y.
X-ray properties in massive galaxy clusters: XMM-Newton observations of the REFLEX-DXL sample (2006)
Boehringer, H., Finoguenov, A., Ikebe, Y., Matsushita, K., Schuecker, P., ...
We selected an unbiased, flux-limited and almost volume-complete sample of 13 distant, X-ray luminous (DXL, $z\sim 0.3$) clusters and one supplementary cluster at $z=0.2578$ from the REFLEX Survey...
X-ray properties in galaxy clusters (2006)
Böhringer, H., Finoguenov, A., Ikebe, Y., Matsushita, K., Schuecker, P., ...
X-ray properties in massive galaxy clusters: XMM-Newton observations of the REFLEX-DXL sample (2006)
Böhringer, H., Finoguenov, A., Ikebe, Y., Matsushita, K., Schuecker, P., ...
X-ray properties in massive galaxy clusters: XMM-Newton observations of the REFLEX-DXL sample (2006)
Böhringer, H., Finoguenov, A., Ikebe, Y., Matsushita, K., Schuecker, P., ...
X-ray properties in massive galaxy clusters: XMM-Newton observations of the REFLEX-DXL sample (2006)
Böhringer, H., Finoguenov, A., Ikebe, Y., Matsushita, K., Schuecker, P., ...
Boehringer, H., Finoguenov, A., Ikebe, Y., Matsushita, K., Schuecker, P., ...
The precise determination of global properties of galaxy clusters, and their scaling relations, is a task of prime importance for the use of clusters as cosmological probes. We performed a detailed...
Spatial distributions of the REFLEX-DXL galaxy clusters at z~0.3 observed by XMM-Newton (2004)
Finoguenov, A., Boehringer, H., Ikebe, Y., Matsushita, K., Schuecker, P., ...
We present XMM-Newton results on the spatially resolved temperature profiles of eight massive galaxy clusters of a volume-limited sample at redshifts $z\sim0.3$ (REFLEX-DXL sample) and an additional...
Implications of the central metal abundance peak in cooling core clusters of galaxies (2004)
Boehringer, H., Matsushita, K., Churazov, E., Finoguenov, A., Ikebe, Y.
Recent XMM-Newton observations of clusters of galaxies have provided detailed information on the distribution of heavy elements in the central regions of clusters with cooling cores providing strong...
Temperature gradients in XMM-Newton observed REFLEX-DXL galaxy clusters at z - 0.3 (2004)
Finoguenov, A., Böhringer, H., Ikebe, Y., Matsushita, K., Schuecker, P.
Properties of the background of EPIC-pn onboard XMM-Newton (2004)
Katayama, H., Takahashi, I., Ikebe, Y., Matsushita, K., Freyberg, M. J.
Implications of the central metal abundance peak in cooling core clusters of galaxies (2004)
Böhringer, H., Matsushita, K., Churazov, E., Finoguenov, A., Ikebe, Y.
Implications of the central metal abundance peak in cooling core clusters of galaxies (2004)
Böhringer, H., Matsushita, K., Churazov, E., Finoguenov, A., Ikebe, Y.
Temperature gradients in XMM-Newton observed REFLEX-DXL galaxy clusters at z~0.3 (2003)
Finoguenov, A., Boehringer, H., Ikebe, Y., Matsushita, K., Schuecker, P.
We present XMM-Newton results on the temperature profiles of a volume-limited sample of galaxy clusters at redshifts z~0.3, selected from the REFLEX survey (REFLEX-DXL sample). In the spectral...
Komossa, S., Burwitz, V., Hasinger, G., Predehl, P., Kaastra, J. S., Ikebe, Y.
Ultraluminous infrared galaxies (ULIRGs) are outstanding due to their huge luminosity output in the infrared, which is predominantly powered by superstarbursts and/or hidden active galactic nuclei...
Properties of the background of EPIC-pn onboard XMM-Newton (2002)
Katayama, H., Takahashi, I., Ikebe, Y., Matsushita, K., Freyberg, M. J.
We have investigated the background properties of EPIC-pn onboard XMM-Newton to establish the background subtraction method. Count rates of the background vary violently by two orders of magnitude at...
Properties of the background of EPIC onboard XMM-Newton (2002)
Katayama, H., Takahashi, I., Ikebe, Y., Matsushita, K., Tanaka, Y., Freyberg, M.
Understanding a background is crucial in particular for a study of low surface brightness objects. In order to establish the background subtraction method, we have studied properties of the EPIC...
The new emerging model for the structure of cooling cores in clusters of galaxies (2002)
Böhringer, H., Matsushita, K., Churazov, E., Ikebe, Y, Chen, Y
New X-ray observations with XMM-Newton show a lack of spectral evidence for large amounts of cooling and condensing gas in the centers of galaxy clusters believed to harbour strong cooling flows....
A new measurement of the X-ray temperature function of clusters of galaxies (2002)
Ikebe, Y., Reiprich, T.H, Böhringer, H., Tanaka, Y., Kitayama, T.
We present a newly measured X-ray temperature function of galaxy clusters using a complete flux-limited sample of 61 clusters. The sample is constructed with the total survey area of 8.14 steradians...
Finoguenov, A., Matsushita, K., Böhringer, H., Ikebe, Y., Arnaud, M.
We present the results of a detailed element abundance study of hot gas in M 87, observed by XMM-Newton. We choose two radial bins, 1'-3' and 8'-16' (8'-14' for EMOS; hereafter the central and the...
Detection of an Iron Emission Feature from the Lensed BAL QSO H1413+117 at z=2.56 (2001)
Oshima, T., Mitsuda, K., Fujimoto, R., Iyomoto, N., Futamoto, K., Hattori, M., ...
We present the X-ray energy spectrum of the lensed BAL QSO H1413+117 (the Cloverleaf) at z=2.56 observed with the Chandra X-ray observatory. We detected 293 photons in a 40 ks Advanced CCD Imaging...
The New Emerging Model for the Structure of Cooling Cores in Clusters of Galaxies (2001)
Boehringer, H., Matsushita, K., Churazov, E., Ikebe, Y., Chen, Y.
New X-ray observations with XMM-Newton show a lack of spectral evidence for large amounts of cooling and condensing gas in the centers of galaxy clusters believed to harbour strong cooling flows. The...
The New Emerging Model for the Structure of Cooling Cores in Clusters of Galaxies (2001)
Boehringer, H., Matsushita, K., Ikebe, Y., Churazov, E.
New X-ray observations with XMM-Newton show a lack of spectral evidence for large amounts of cooling and condensing gas in the centers of galaxy clusters believed to harbour strong cooling flows....
Finoguenov, A., Matsushita, K., Boehringer, H., Ikebe, Y., Arnaud, M.
We present the results of a detailed element abundance study of hot gas in M87, observed by XMM-Newton. We choose two radial bins, 1'-3' and 8'-16' (8'-14' for EMOS; hereafter the central and the...
Furusho, T., Yamasaki, N. Y., Ohashi, T., Shibata, R., Kagei, T., Ishisaki, Y., ...
We present two-dimensional temperature maps of three bright clusters of galaxies Abell 1060, AWM7, and the Centaurus cluster, based on multi-pointing observations with the ASCA GIS. The temperatures...
UV observations of the galaxy cluster Abell 1795 with the optical monitor on XMM-Newton (2000)
Mittaz, J. P., Kaastra, J. S., Tamura, T., Fabian, A. C., Mushotzky, R. F., Peterson, J. R., ...
We present the results of an analysis of broad band UV observations of the central regions of Abell 1795 observed with the optical monitor on XMM-Newton. As have been found with other UV observations...
X-ray Spectroscopy of the Cluster of Galaxies Abell 1795 with XMM-Newton (2000)
Tamura, T., Kaastra, J. S., Peterson, J. R., Paerels, F., Mittaz, J. P. D., Trudolyubov, S. P., ...
The initial results from XMM-Newton observations of the rich cluster of galaxies Abell 1795 are presented. The spatially-resolved X-ray spectra taken by the European Photon Imaging Cameras (EPIC)...
Detection of an X-Ray Hot Region in the Virgo Cluster of Galaxies with ASCA (2000)
Kikuchi, K., Itoh, C., Kushino, A., Furusho, T., Matsushita, K., Yamasaki, N. Y., ...
Based on mapping observations with ASCA, an unusual hot region with a spatial extent of 1 square degree was discovered between M87 and M49 at a center coordinate of R. A. = 12h 27m 36s and Dec. =...
The X-ray Morphology of the Lensing Galaxy Cluster Cl0024+17 (1999)
Böhringer, H., Soucail, G., Mellier, Y., Ikebe, Y., Schuecker, P.
The paper reports the analysis of a very deep ROSAT HRI observation of the distant lensing cluster, CL0024+17. The morphology of the cluster is studied and the small core radius inferred from lensing...
Kikuchi, K., Furusho, T., Ezawa, H., Yamasaki, N. Y., Ohashi, T., Fukazawa, Y., ...
We present ASCA results on the distributions of metallicity and temperature in 3 bright near-by clusters: A4059, MKW 3s and 2A 0335+096. A significant gradient in the metal abundance is detected in...
Schindler, S., Belloni, P., Ikebe, Y., Hattori, M., Wambsganss, J., Tanaka, Y.
Recent X-ray observations of the rich galaxy cluster CL 0939+4713 at z = 0.41 with the ROSAT/HRI as well as with the ASCA/GIS and ASCA/SIS are presented and analysed. With the high resolution imaging...
Xu, H., Makishima, K., Fukazawa, Y., Ikebe, Y., Kikuchi, K., Ohashi, T., ...
Using the X-ray data from \ASCA, spectral and spatial properties of the intra-cluster medium (ICM) of the cD cluster Abell 1795 are studied, up to a radial distance of $\sim 12'$ ($\sim 1.3$...
An ASCA-ROSAT Study of the Distant, Lensing Cluster A2390 (1998)
Boehringer, H., Tanaka, Y., Mushotzky, R. F., Ikebe, Y., Hattori, M.
We present the results of a combined study of ASCA and ROSAT observations of the distant cluster Abell 2390.We determine the surface brightness profile and the gas density distribution of the cluster...
The Structure of the X-Ray Emitting Gas in the Hydra-A Cluster of Galaxies (1997)
Ikebe, Y., Makishima, K., Ezawa, H., Fukazawa, Y., Hirayama, M., Honda, H., ...
The temperature and abundance structure in the intracluster medium (ICM) of the Hydra-A cluster of galaxies is studied with ASCA and ROSAT. The effect of the large extended outskirts in the...