Zobrazeno 51 - 60
of 2 278
pro vyhledávání: '"Werner N"'
Autor:
Randall, S. W., Nulsen, P. E. J., Jones, C., Forman, W. R., Bulbul, E., Clarke, T. E., Kraft, R., Blanton, E. L., David, L., Werner, N., Sun, M., Donahue, M., Giacintucci, S., Simionescu, A.
We present results from a very deep (650 ks) Chandra X-ray observation of the galaxy group NGC~5813, the deepest Chandra observation of a galaxy group to date. Earlier observations showed two pairs of cavities distributed roughly collinearly, with ea
Externí odkaz:
http://arxiv.org/abs/1503.08205
Most of the massive elliptical galaxies in the universe stopped forming stars billions of years ago, even though plenty of hot gas remains available for star formation. Here we present compelling evidence indicating that quenching of star formation d
Externí odkaz:
http://arxiv.org/abs/1503.02104
Autor:
Zhuravleva, I., Churazov, E., Arevalo, P., Schekochihin, A. A., Allen, S. W., Fabian, A. C., Forman, W. R., Sanders, J. S., Simionescu, A., Sunyaev, R., Vikhlinin, A., Werner, N.
X-ray surface brightness fluctuations in the core of the Perseus Cluster are analyzed, using deep observations with the Chandra observatory. The amplitude of gas density fluctuations on different scales is measured in a set of radial annuli. It varie
Externí odkaz:
http://arxiv.org/abs/1501.07271
Autor:
Canning, R. E. A., Ferland, G. J., Fabian, A. C., Johnstone, R. M., van Hoof, P. A. M., Porter, R. L., Werner, N., Williams, R. J. R.
Many massive galaxies at the centres of relaxed galaxy clusters and groups have vast reservoirs of cool (~10,000 K) and cold (~100 K) gas. In many low redshift brightest group and cluster galaxies this gas is lifted into the hot ISM in filamentary st
Externí odkaz:
http://arxiv.org/abs/1501.01081
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
While the cooling of the hot intra-cluster medium (ICM) in the cores of galaxy clusters is mostly counteracted by heating from the central active galactic nucleus (AGN), the balance is not perfect. This can lead to residual cooling flows and low-leve
Externí odkaz:
http://arxiv.org/abs/1411.2604
We present the results of a search for unidentified emission lines in deep Suzaku X-ray spectra for the central regions of the four X-ray brightest galaxy clusters: Perseus, Coma, Virgo and Ophiuchus. We employ an optimized energy range for our analy
Externí odkaz:
http://arxiv.org/abs/1411.0050
Autor:
Zhuravleva, I., Churazov, E., Schekochihin, A. A., Allen, S. W., Arevalo, P., Fabian, A. C., Forman, W. R., Sanders, J. S., Simionescu, A., Sunyaev, R., Vikhlinin, A., Werner, N.
The hot, X-ray-emitting intracluster medium (ICM) is the dominant baryonic constituent of clusters of galaxies. In the cores of many clusters, radiative energy losses from the ICM occur on timescales significantly shorter than the age of the system.
Externí odkaz:
http://arxiv.org/abs/1410.6485
Autor:
Ichinohe, Y., Werner, N., Simionescu, A., Allen, S. W., Canning, R. E. A., Ehlert, S., Mernier, F., Takahashi, T.
We present the results of deep Chandra, XMM-Newton and Suzaku observations of the nearby galaxy cluster Abell 85, which is currently undergoing at least two mergers, and in addition shows evidence for gas sloshing which extends out to r ~ 600 kpc. On
Externí odkaz:
http://arxiv.org/abs/1410.1955
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