5 papers
Reconciling Damped Ly-alpha Statistics and 21cm Studies at z=0
Martin Zwaan, Frank Briggs, Marc Verheijen
Blind 21cm surveys in the local universe have shown that the local HI mass density, Omega_HI, is dominated by luminous, high surface brightness, spiral galaxies. On the other hand,…
The HI mass function in Ursa Major
Marc Verheijen, Neil Trentham, Brent Tully +1
A deep blind HI survey of the nearby spiral rich Ursa Major cluster has been performed with the VLA in parallel with a wide-field R-band imaging campaign of most VLA fields with th…
Constraints on the Space Density of Extragalactic HVCs
Martin A. Zwaan
High Velocity Clouds (HVCs) have recently attracted renewed attention as being long lived, massive dark matter dominated clouds of primordial composition distributed throughout the…
The Local HI Mass Function
Martin Zwaan
The local HI mass function (HIMF), like the optical luminosity function, is an important observational input into models of cosmology and galaxy evolution. It is a helpful framewor…
The Planet Collaboration: Probing Lensing Anomalies
The PLANET Collaboration, M. Albrow, J. -P. Beaulieu +16
The Probing Lensing Anomalies NETwork (PLANET) is a worldwide collaboration of astronomers using semi-dedicated European, South African, and Australian telescopes to perform contin…