Gas kinematics in the halo of the warm ULIRG PKS1345+12
We use long-slit spectra taken with the William Herschel Telescope on La Palma and high-resolution Hubble Space Telescope imaging to study the gas kinematic in...
We present ample evidence for the presence of continuing gaseous infall to the Galactic plane, and then show how interaction of this gas with the disc gas...
Giant HVC's and the Rotation Curves of the Milky Way and M31
We have modelled, for the cases of Milky Way and M31, the effects on the galactic discs, of the arrival at high velocity (≥150 km s-1) of giant HI clouds, with...
We report the detection of a bisymmetric nuclear spiral structure in the spiral galaxy NGC 5248. The two red spiral arms can be followed for about 3 arcsec...
Gravitational Lenses and the Hubble Constant: Present and Future
The best studied gravitational lens is the Twin QSO Q0957+561, and as a result of recent advances in observations and modelling, a ten percent measurement of...
Gravitationally Induced Inflow in Starbursts and Agn
There is considerable evidence that the circumnuclear regions of galaxies are intimately related to their host galaxies, most directly through their bars. There...