Astronomy and Astrophysics – Astronomy
Scientific paper
Feb 1977
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1977jrasc..71...40f&link_type=abstract
Journal of the Royal Astronomical Society of Canada, vol. 71, Feb. 1977, p. 40-46.
Astronomy and Astrophysics
Astronomy
Brightness Discrimination, Identifying, Quasars, Radio Sources (Astronomy), Red Shift, Galactic Evolution, Galactic Nuclei, Luminous Intensity, Optical Measurement, Radio Spectra
Scientific paper
The dilemma posed by the enormous redshifts and high intrinsic brightness of quasars is considered. Identification of the optical counterparts to the radio sources 3C 48 and 3C 273 is reviewed, redshift mechanisms involving expansion of the Universe and gravitational redshifts are described, and observations of quasar emission variability are discussed. The crux of the quasar dilemma is shown to be how to account for incredible outpourings of energy from a single object that is minute in comparison with even one galaxy. Attempted explanations examined include high-speed ejections from nearby galaxies, chain reactions of supernovae, spinars, matter-antimatter interaction, some unknown process in nearby objects, and the idea that quasars represent an early stage in the evolution of galactic nuclei.
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