Over the past decade, measurement and modelling of luminosity functions at redshifts beyond z ≈ 6 have become pivotal to trace the early stages of galaxy build-up and the evolution of cosmic star ...

Quasars are exceptionally luminous nuclei of distant galaxies powered by accretion onto supermassive black holes. Systematic cataloguing of quasars combines wide–area photometric surveys with targeted ...

Luminosity function describes the space density (Φ on the vertical axis) as a function of radiation energy (M1450 on the horizontal axis). We plot the luminosity functions of quasars observed when the ...

An international team of researchers including the Kavli Institute for the Physics and Mathematics of the Universe (Kavli IPMU) has studied the relation between galaxy size and luminosity of some of ...

Astronomers working with Hubble deep-field data have concluded that the observable universe holds roughly two trillion ...