Browsing University of Hertfordshire by Author "A.~Wilson"

Now showing items 1-2 of 2

    • The Nature of X-ray Absorbed Starburst QSOs and the QSO Evolutionary Scheme 

      Page, M. J.; Carrera, F.J.; Ebrero, J.; Stevens, Jason; Ivison, Rob J. (European Space Agency (ESA), 2006-01-01)
      In contradiction to the simple AGN unification schemes, there exists a significant population of broad line, z ~ 2 QSOs which have heavily absorbed X-ray spectra. These objects have luminosities and redshifts characteristic ...

    • The XMM-Newton and Spitzer View of Galaxy/AGN Formation at z = 2-3 

      Carrera, F.J.; Ebrero, J.; Page, M. J.; Stevens, Jason (European Space Agency (ESA), 2006-01-01)
      The genesis of spheroids is central to our understanding of galaxy formation. They contain half of the stellar mass of the Universe, and almost all of the black hole mass. According to galaxy formation models, cluster ...