326 citations · 1.1k across the 26 of their papers we have counts for
15 papers · 1 filter
Strong Dynamo Action in Rapidly Rotating Suns
Benjamin P. Brown, Matthew K. Browning, Allan Sacha Brun +3
Stellar dynamos are driven by complex couplings between rotation and turbulent convection, which drive global-scale flows and build and rebuild stellar magnetic fields. When stars…
Rapid Rotation, Active Nests of Convection and Global-scale Flows in Solar-like Stars
Benjamin P. Brown, Matthew K. Browning, Allan Sacha Brun +2
In the solar convection zone, rotation couples with intensely turbulent convection to build global-scale flows of differential rotation and meridional circulation. Our sun must hav…
On magnetic instabilities and dynamo action in stellar radiation zones
J. -P. Zahn, A. S. Brun, S. Mathis
We examine the MHD instabilities arising in the radiation zone of a differentially rotating star, in which a poloidal field of fossil origin is sheared into a toroidal field. We fo…
Hard X-ray emission of the microquasar GX 339-4 in the low/hard state
A. Joinet, E. Jourdain, J. Malzac +4
We present the analysis of the high energy emission of the Galactic black hole binary GX 339-4 in a low/hard state at the beginning of its 2004 outburst. The data from 273 ks of IN…
Spitzer Observations of Massive Red Galaxies at High Redshift
Casey Papovich, L. A. Moustakas, M. Dickinson +18
We investigate the properties of massive galaxies at z=1-3.5 using HST observations, ground-based near-IR imaging, and Spitzer Space Telescope observations at 3-24 micron. We ident…
The asymmetric compact jet of GRS 1915+105
M. Ribo, V. Dhawan, I. F. Mirabel
We present multiepoch VLBA observations of the compact jet of GRS 1915+105 conducted at 15.0 and 8.4 GHz during a {\it plateau} state of the source in 2003 March-April. These obser…
XMM-Newton observation of Kepler's supernova remnant
G. Cassam-Chenai, A. Decourchelle, J. Ballet +3
We present the first results coming from the observation of Kepler's supernova remnant obtained with the EPIC instruments on board the XMM-Newton satellite. We focus on the images…
First XMM-Newton results on the Pulsar Wind Nebula in the composite supernova remnant G0.9+0.1
D. Porquet, A. Decourchelle, R. S. Warwick
We report the results of the XMM-Newton observation of the Pulsar Wind Nebula (PWN) in the composite supernova remnant G0.9+0.1 located in the Galactic Center region. Thanks to the…
X-ray powerful diagnostics for highly-ionized plasmas: He-like ions
D. Porquet, R. Mewe, J. S. Kaastra +2
The calculations of the ratios of the Helium-like ion X-ray lines from C V to Si XIII are revisited in order to apply the results to density, temperature and ionization process dia…
Helium-like triplet diagnostics
Jacques Dubau, Delphine Porquet
The 1s2-1s2l lines are the most intense He-like ions lines. They are used as spectroscopic diagnostics for solar active regions as well as for different laboratory plasmas. Nowaday…
Probing the gravitational potential of a nearby lensing cluster Abell 2104
H. Liang, L. Lemonon, I. Valtchanov +2
The cluster Abell 2104 is one of the lowest redshift clusters (z=0.153) known to have a gravitational lensing arc. We present detailed analysis of the cluster properties such as th…
X-ray Clusters and the Search for Cosmic Flows
P. D. Lynam, C. A. Collins, P. A. James +2
We are engaged in an investigation of the relationship between the properties of BCG candidates and X-ray characteristics of their host clusters for a flux-limited sample of ~250 A…
Cluster identification via Voronoi tessellation
M. Ramella, M. Nonino, W. Boschin +1
We propose an automated method for detecting galaxy clusters in imaging surveys based on the Voronoi tessellation technique. It appears very promising, expecially for its capabilit…
Towards a consistent model of the Galaxy: I. kinematic properties, star counts and microlensing observations
D. Méra, G. Chabrier, R. Schaeffer
We examine the most recent observational constraints arising from i) small-scale and large-scale Galactic dynamical properties, ii) star counts at faint magnitude and iii) microlen…
Towards a consistent model of the Galaxy: II. Derivation of the model
D. Méra, G. Chabrier, R. Schaeffer
We use the calculations derived in a previous paper (Méra, Chabrier and Schaeffer, 1997), based on observational constraints arising from star counts, microlensing experiments and…