Dual black holes in merger remnants. II: spin evolution and gravitational recoil (2009)
Dotti, M., Volonteri, M., Perego, A., Colpi, M., Ruszkowski, M., Haardt, F.
Using high resolution hydrodynamical simulations, we explore the spin evolution of massive dual black holes orbiting inside a circumnuclear disc, relic of a gas-rich galaxy merger. The black holes...
The Evolution of Galaxy Clusters Across Cosmic Time (2009)
Arnaud, M., Bohringer, H., Jones, C., McNamara, B., Ohashi, T., Patnaude, D., ...
The large scale structure of the present Universe is determined by the growth of dark matter density fluctuations and by the dynamical action of dark energy and dark matter. While much progress has...
Dual black holes in merger remnants. I: linking accretion to dynamics (2009)
Dotti, M., Ruszkowski, M., Paredi, L., Colpi, M., Volonteri, M., Haardt, F.
We study the orbital evolution and accretion history of massive black hole (MBH) pairs in rotationally supported circumnuclear discs up to the point where MBHs form binary systems. Our simulations...
In-depth Chandra study of the AGN feedback in Virgo elliptical galaxy M84 (2008)
Finoguenov, A., Ruszkowski, M., Jones, C., Brueggen, M., Vikhlinin, A., Mandel, E.
Using deep Chandra observations of M84 we study the energetics of the interaction between the black hole and the interstellar medium of this early-type galaxy. We perform a detailed two dimensional...
A Global Stability Analysis of Clusters of Galaxies with Conduction and AGN Feedback Heating (2008)
Guo, Fulai, Oh, S. Peng, Ruszkowski, M.
We investigate a series of steady-state models of galaxy clusters, in which the hot intracluster gas is efficiently heated by active galactic nucleus (AGN) feedback and thermal conduction, and in...
Cosmic ray confinement in fossil cluster bubbles (2008)
Ruszkowski, M., Ensslin, T. A., Brüggen, M., Begelman, M. C., Churazov, E.
Cosmic ray confinement in fossil cluster bubbles (2008)
Ruszkowski, M., Ensslin, T. A., Brüggen, M., Begelman, M. C., Churazov, E.
In-depth Chandra study of the AGN feedback in Virgo elliptical galaxy M84 (2008)
Finoguenov, A., Ruszkowski, M., Jones, C., Brüggen, M., Vikhlinin, A., Mandel, E.
Shock heating by FR I radio sources in galaxy clusters (2007)
Brueggen, M., Heinz, S., Roediger, E., Ruszkowski, M., Simionescu, A.
Feedback by active galactic nuclei (AGN) is frequently invoked to explain the cut-off of the galaxy luminosity function at the bright end and the absence of cooling flows in galaxy clusters....
Cosmic ray confinement in fossil cluster bubbles (2007)
Ruszkowski, M., Ensslin, T. A., Bruggen, M., Begelman, M. C., Churazov, E.
Most cool core clusters of galaxies possess active galactic nuclei (AGN) in their centers. These AGN inflate buoyant bubbles containing non-thermal radio emitting particles. If such bubbles...
Impact of tangled magnetic fields on AGN-blown bubbles (2007)
Ruszkowski, M., Ensslin, T. A., Bruggen, M., Heinz, S., Pfrommer, C.
There is growing consensus that feedback from AGN is the main mechanism responsible for stopping cooling flows in clusters of galaxies. AGN are known to inflate buoyant bubbles that supply mechanical...
Impact of tangled magnetic fields on fossil radio bubbles (2007)
Ruszkowski, M., Ensslin, T. A., Brüggen, M., Heinz, S., Pfrommer, C.
Shock heating by Fanaroff–Riley type I radio sources in galaxy clusters (2007)
Brüggen, M., Heinz, S., Roediger, E., Ruszkowski, M., Simionescu, A.
Viscosity in cosmological simulations of clusters of galaxies (2005)
The physics of the intracluster medium, in particular the values for the thermal conductivity and the viscosity are largely unknown and subject to an ongoing debate. Here, we study the effect of...
Roychowdhury, Suparna, Ruszkowski, M., Nath, Biman B.
Restricted Access. An open-access version is available at arXiv.org (one of the alternative locations)
Simulations of magnetic fields in filaments (2005)
Bruggen, M., Ruszkowski, M., Simionescu, A., Hoeft, M., Vecchia, C. Dalla
The intergalactic magnetic field within filaments should be less polluted by magnetised outflows from active galaxies than magnetic fields in clusters. Therefore, filaments may be a better laboratory...
AGN heating, thermal conduction and Sunyaev-Zeldovich effect in galaxy groups and clusters (2005)
Roychowdhury, S., Ruszkowski, M., Nath, B. B.
(abridged) We investigate in detail the role of active galactic nuclei on the physical state of the gas in galaxy groups and clusters, and the implications for anisotropy in the CMB from...
X-ray line tomography of AGN-induced motion in clusters of galaxies (2005)
Brueggen, M., Hoeft, M., Ruszkowski, M.
The thermal broadening of emission lines of heavy ions is small enough such that Doppler shifts due to bulk motions may be detected with the next generation of X-ray observatories. This opens up the...
AGN heating and dissipative processes in galaxy clusters (2005)
Bruggen, M., Ruszkowski, M., Hallman, E.
Recent X-ray observations reveal growing evidence for heating by active galactic nuclei (AGN) in clusters and groups of galaxies. AGN outflows play a crucial role in explaining the riddle of cooling...
Entropy "floor" and effervescent heating of intracluster gas (2004)
Roychowhury, Suparna, Ruszkowski, M., Nath, Biman B., Begelman, Mitchell C.
Restricted Access. An open-access version is available at arXiv.org (one of the alternative locations)
Entropy "floor" and effervescent heating of intracluster gas (2004)
Roychowdhury, S., Ruszkowski, M., Nath, B. B., Begelman, Mitchell C.
Recent X-ray observations of clusters of galaxies have shown that the entropy of the intracluster medium (ICM), even at radii as large as half the virial radius, is higher than that expected from...
ROSAT HRI Monitoring of Extreme X-ray Variability in the Narrow-Line Quasar PHL 1092 (1999)
Brandt, W. N., Boller, Th., Fabian, A. C., Ruszkowski, M.
We report results from an 18-day ROSAT HRI monitoring campaign on the ultrasoft Narrow-Line Seyfert 1 (NLS1) class quasar PHL 1092. This luminous, radio-quiet quasar showed strong X-ray variability...