Mathematics – Logic
Scientific paper
Apr 1978
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1978mercu...7...27s&link_type=abstract
Mercury, vol. 7, Mar.-Apr. 1978, p. 27-33.
Mathematics
Logic
1
Extraterrestrial Radiation, Quasars, Stellar Evolution, Absorption Spectra, Radio Emission, Red Shift, Stellar Models, Stellar Motions
Scientific paper
Basic questions regarding the quasars are related to their distance and their power output. Many astronomers believe that quasars are the most distant objects in the universe. In this case the power output of quasars must be exceedingly large and questions arise regarding the source of this power. The large redshift value of 3.53 observed in the case of OQ172 implies that this quasar moves away from the solar system with a velocity of more than 90% of the speed of light. If the 'edge of the universe' is considered to be at the distance that light could have travelled during the time since the 'Big Bang' about 20 billion years ago, then OQ172 must be nine tenths of the way to the edge of the universe. The light currently received from OQ172 must have been emitted about 18 billion years ago. Attention is also given to radio-quiet quasars, the approaches employed to discover them, the discovery of highly variable quasars, objects which appear to be expanding with a velocity greater than the velocity of light, noncosmological redshifts, absorption features in quasars, a quasar model, and theories regarding the energy source of the quasar.
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