Astronomy and Astrophysics – Astrophysics
Scientific paper
2000-03-28
Astronomy and Astrophysics
Astrophysics
Invited Review presented at IGRAP International Conference on "Clustering at High Redshift", Marseilles (June 29 - July 2 1999
Scientific paper
One of the major goals of observational cosmology is to acquire empirical data that has the diagnostic power to develop the theoretical modelling of the high-redshift universe, ultimately leading to an accurate understanding of the processes by which galaxies and clusters form and subsequently evolve. New bolometer arrays operating on the world's largest submillimetre telescopes now offer a unique view of the high-redshift universe through unbiassed surveys with unprecedented sensitivity. For brevity, except when there is a need to be more specific, the FIR to millimetre wavelength regime (100um < lambda < 6000um) will be referred to as the ``submillimetre'' (submm). One of the major challenges in this field is to accurately quantify the star-formation history of submm-selected galaxies, particularly those at redshifts > 1, and determine their contribution to the submm extragalactic background. The field of observational cosmology will be revolutionized during the course of the next 10 years due to the variety of powerful new ground-based, airborne and satellite facilities, particularly those operating at FIR to millimetre wavelengths. This review summarises the results from the recent blank-field submm surveys, and describes the future observations that will provide accurate source-counts over wider ranges of wavelength and flux-density, constrain the spectral energy distributions of the submm-selected galaxies and accurately constrain the redshift distribution and submm luminosity function by removing the current ambiguities in the optical, IR and radio counterparts.
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