135 citations · 135 across the 1 of their papers we have counts for
4 papers
The Metagalactic Ionizing Radiation Field at Low Redshift
J. M. Shull, D. Roberts, M. L. Giroux +2
We compute the ionizing radiation field at low redshift, arising from Seyferts, QSOs, and starburst galaxies. This calculation combines recent Seyfert luminosity functions, extrapo…
Cosmological consequences of particle creation during inflation
David H. Lyth, David Roberts
Particle creation during inflation is considered. It could be important for species whose interaction is of gravitational strength or weaker. A complete but economical formalism is…
Open Cold Dark Matter Models
Andrew R Liddle, David H Lyth, David Roberts +1
Motivated by recent developments in inflationary cosmology indicating the possibility of obtaining genuinely open universes in some models, we compare the predictions of cold dark…
False Vacuum Inflation with a Quartic Potential
David Roberts, Andrew R Liddle, David H Lyth
We consider a variant of Hybrid Inflation, where inflation is driven by two interacting scalar fields, one of which has a `Mexican hat' potential and the other a quartic potential.…