Author pages are created from data sourced from our academic publisher partnerships and public sources.
Share This Author
The tidal disruption rate in dense galactic cusps containing a supermassive binary black hole
We consider the problem of tidal disruption of stars in the centre of a galaxy containing a supermassive binary black hole with unequal masses. We assume that over the separation distance between the… Expand
New constraints on a triaxial model of the Galaxy
We determine the most likely values of the free parameters of an N-body model for the Galaxy developed by Fux via a discrete–discrete comparison with the positions on the sky and line-of-sight… Expand
Dynamics of the Galactic Bulge using planetary nebulae. (Thesis abstract).
Evidence for a bar at the center of the Milky Way triggered a renewed enthusiasm for dynamical modeling of the Galactic bar-bulge. Our goal is to compare the kinematics of a sample of tracers,… Expand
The Hubble Time Inferred from 10 Time Delay Lenses
We present a simultaneous analysis of 10 galaxy lenses having time delay measurements. For each lens, we derive a detailed free-form mass map, with uncertainties, and with the additional requirement… Expand
Unstable modes of a spherical stellar system
- P. Saha
- 1 February 1991
The radial orbit instability for a family of anisotropic isochrone spheres is studied by a numerical linear stability analysis, and the results are compared with N-body simulations. A new way of… Expand
Symplectic integrators for solar system dynamics
Many problems in solar system dynamics are described by Hamiltonians of the form H = H(Kep) + eH(pert) , E 1, where H(Kep) is the usual Hamiltonian for the Kepler two-body problem and eH(pert)… Expand
The behaviour of dark matter associated with four bright cluster galaxies in the 10 kpc core of Abell 3827
Galaxy cluster Abell 3827 hosts the stellar remnants of four almost equally bright elliptical galaxies within a core of radius 10 kpc. Such corrugation of the stellar distribution is very rare, and… Expand
Towards relativistic orbit fitting of Galactic center stars and pulsars
The S stars orbiting the Galactic center black hole reach speeds of up to a few percent the speed of light during pericenter passage. This makes, for example, S2 at pericenter much more relativistic… Expand
Light/mass offsets in the lensing cluster Abell 3827: evidence for collisional dark matter?
If dark matter has a non-zero self-interaction cross-section, then dark matter haloes of individual galaxies in cluster cores should experience a drag force from the ambient dark matter of the… Expand