200 citations · 845 across the 24 of their papers we have counts for
18 papers · 1 filter
K-band Imaging of strong CaII-absorber host galaxies at z~1
Paul Hewett, Vivienne Wild
We present K-band imaging of fields around 30 strong CaII absorption line systems, at 0.7<z<1.1, three of which are confirmed Damped Lyman-alpha systems. A significant excess of ga…
Metal mixing by buoyant bubbles in galaxy clusters
E. Roediger, M. Brueggen, P. Rebusco +2
Using a series of three-dimensional, hydrodynamic simulations on an adaptive grid, we have performed a systematic study on the effect of bubble-induced motions on metallicity profi…
Re-condensation from an ADAF into an inner disk - the intermediate state of black hole accretion?
F. Meyer, B. F. Liu, E. Meyer-Hofmeister
Context: Accretion onto galactic and supermassive black holes occurs in different modes, which are documented in hard and soft spectral states, commonly attributed to an advection-…
Internal shocks in relativistic outflows: collisions of magnetized shells
Petar Mimica, Miguel-Angel Aloy, Ewald Mueller
(Abridged): We study the collision of magnetized irregularities (shells) in relativistic outflows in order to explain the origin of the generic phenomenology observed in the non-th…
Evidence for relativistic features in the X-ray spectrum of Mrk 335
Anna Lia Longinotti, Stuart Sim, Kirpal Nandra +1
We present an analysis of hard X-ray features in the spectrum of the bright Sy 1 galaxy Mrk 335 observed by the XMM-Newton satellite. Our analysis confi rms the presence of a broad…
Tip of the Red Giant Branch distances to galaxies with composite stellar populations
Maurizio Salaris, Leo Girardi
(Abridged) We have investigated the reliability of the widely used I-band Tip of the RGB relative distances for a sample of Local Group galaxies with complex Star Formation Histori…
Evolution of planetary nebulae II. Population effects on the bright cut-off of the PNLF
P. Marigo, L. Girardi, A. Weiss +2
We investigate the bright cut-off of the [OIII]l5007 planetary nebula luminosity function (PNLF), that has been suggested as a powerful extragalactic distance indicator. Theoretica…
The hydrodynamics of dead radio galaxies
C. S. Reynolds, S. Heinz, M. C. Begelman
We present a numerical investigation of dead, or relic, radio galaxies and the environmental impact that radio galaxy activity has on the host galaxy or galaxy cluster. We perform…
The Large-Scale Tidal Velocity Field
Y. Hoffman, A. Eldar, S. Zaroubi +1
We present a method for decomposing the cosmological velocity field in a given volume into its divergent component due to the density fluctuations inside the volume, and its tidal…
Cosmic Shear and Clusters of Galaxies
Y. Mellier, L. van Waerbeke, T. Erben +9
The first detections of cosmic shear signal reported recently by 4 independent groups cover angular scales between one and 10 arcmin. On those scales, the cosmic shear is a signatu…
A Numerical Study of Cosmic Shear Statistics
A. Thion, Y. Mellier, F. Bernardeau +3
We explore the stability of the variance and skewness of the cosmic gravitational convergence field, using two different approaches: first we simulate a whole MEGACAM survey (100 s…
Cosmic Shear with the VLT
R. Maoli, Y. Mellier, L. van Waerbeke +5
We report on the detection of cosmic shear on angular scales of 1.3-6.5 arcmin using 45 independent empty fields observed with the Very Large Telescope (VLT). This result confirms…
The enigmatic soft X-ray NLS1 RX J0134.2-4258
D. Grupe, K. M. Leighly, H. -C. Thomas +1
We report the discovery and analysis of the follow-up ROSAT pointed observation, an ASCA observation and optical and radio observations of the enigmatic Narrow-Line Seyfert 1 galax…
Riemann Solvers in General Relativistic Hydrodynamics
J. M. Ibanez, M. A. Aloy, J. A. Font +3
Our contribution concerns with the numerical solution of the 3D general relativistic hydrodynamical system of equations within the framework of the 3+1 formalism. We summarize the…
Giant and `double-double' radio galaxies: Implications for the evolution of powerful radio sources and the IGM
A. P. Schoenmakers, A. G. de Bruyn, H. J. A. Röttgering +3
Giant radio sources form the linear size extreme of the extra-galactic radio source population. Using the WENSS survey, we have selected a complete sample of these sources. We have…
Is the core mass-luminosity relation violated by the occurrence of the third dredge-up ?
P. Marigo, L. Girardi, A. Weiss +1
The core mass-luminosity (Mc-L) relation of TP-AGB stars is a key ingredient in synthetic calculations of their evolution. Recently, Herwig et al. (1998) have presented full calcul…
The Hubble Constant from Type Ia Supernovae in Early-Type Galaxies
Tom Richtler, Georg Drenkhahn
Type Ia supernovae (SNe) are the best standard candles available today in spite of an appreciable intrinsic variation of their luminosities at maximum phase, and of probably non-un…
Efficiency of weak lensing surveys to probe cosmological models
L. Van Waerbeke, F. Bernardeau, Y. Mellier
We apply a mass reconstruction technique to simulated large-scale structure gravitational distortion maps, from 2.5' to 10 degree scales, for different cosmological scenarii. The p…