Astronomy and Astrophysics – Astronomy
Scientific paper
Apr 1982
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982sci...216..265k&link_type=abstract
Science, vol. 216, Apr. 16, 1982, p. 265-269.
Astronomy and Astrophysics
Astronomy
3
Galaxies, Spaceborne Astronomy, Universe, Astronomical Spectroscopy, Brightness, Cosmology, Distance, Quasars, Radio Galaxies, Red Shift, X Ray Sources
Scientific paper
It is shown that, although the development of detection and identification techniques has resulted in significant progress in the study of distant galaxies, questions as to the processes controlling the evolution of galaxy observable properties and the implications of distant galaxy observations for the large-scale structure of the universe remain unanswered. In both cases, strict selection criteria for the inclusion of any given galaxy in a statistical sample are called for. Attention is given to observational limitations imposed by galaxy surface brightness, quasar emission line redshifts, radio and X-ray pointers to distant galaxies, and practical aspects of faint spectroscopy. It is projected that future researches will stress complete redshift surveys, that spectroscopic techniques will exploit CCDs, that photometry in the near-IR will play an important role, and that the Space Telescope will permit UV spectroscopy of faint objects.
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