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4 papers · 2 filters
Radiative transition rates and collision strengths for Si II
M. A. Bautista, P. Quinet, P. Palmeri +3
Aims. This work reports radiative transition rates and electron impact excitation collision strengths for levels of the 3s23p, 3s3p2, 3s24s, and 3s23d configurations of Siii. Metho…
Early dynamical evolution of star cluster systems
Genevieve Parmentier
Violent relaxation -- the protocluster dynamical response to the expulsion of its residual star forming gas -- is a short albeit crucial episode in the evolution of star clusters a…
Evidence for two populations of Galactic globular clusters from the ratio of their half-mass to Jacobi radii
Holger Baumgardt, Genevieve Parmentier, Mark Gieles +1
We investigate the ratio between the half-mass radii r_h of Galactic globular clusters and their Jacobi radii r_J given by the potential of the Milky Way and show that clusters wit…
Near-IR observations of the HE0450-2958 system: discovery of a second AGN?
G. Letawe, P. Magain, V. Chantry +1
The QSO HE0450-2958 was brought to the front scene by the non-detection of its host galaxy and strong upper limits on the latter's luminosity. The QSO is also a powerful infrared e…