|
The topic of quasars as ejection phenomena from galaxies, and redshifts as intrinsic components of quasars, rather than indicators of distance and velocity, has been controversial since it was proposed three decades ago. In fact, the originator of the theory, Dr. Halton Arp, was basically black-listed and even prevented from using telescope time. Things had gotten so out of hand in the United States, he had to move to Germany to continue his research. For information and links on this topic see the internet resources at the bottom of this page.
 While Dr. Halton Arp presents very convincing evidence of ejection and discordant redshifts, there has been no theory of how the ejection takes place. However, in The Vital Vastness there is extensive evidence that the mechanism is the result of a new model of celestial objects in general. In fact, there is evidence that ejection also takes place on the planets in our solar system. For information on this see Planetary Ejections and Cratering, The Need For a New Model of the Earth -- The Living and Dynamic Earth, and The Similarity of Celestial Objects web pages for more on the Field-dynamical Model, which can produce ejection phenomena.
The detection of high-redshift quasars.
 The detection of samples of high-redshift (i.e. distant) quasars provides direct information on the physical conditions existing when the Universe was only 10% of its present age. Quasars are the bright nuclei of certain galaxies and are the only astronomical sources that can currently be found in substantial numbers at redshifts z>2. It is probable that quasars are active for only a small proportion of the life of the host galaxy, in which case a substantial fraction of all galaxies must go through a quasar phase at some time in their history. Consequently quasars may be tracers of the galaxy population at high redshift, less active members of which are too faint for detailed study with present-day instrumentation. The main purpose of surveys for high-redshift quasars, then, is to map the evolution of the population, in luminosity and number density, back through the history of the Universe, thereby furnishing clues both to the nature of the quasar phenomenon itself and to the poorly understood process of how galaxies formed. Of special interest is the possibility of detecting the epoch of the birth of the quasar population. The authors summarise the optical and radio techniques employed in the detection of high-redshift (z>3) quasars and attempt to reconcile the contradictory claims in the literature concerning the evolution of their space density at the highest redshifts.
High-Redshift Quasars Found in Sloan Digital Sky Survey Commissioning Data II: The Spring Equatorial Stripe.
This is the second paper in a series aimed at finding high-redshift quasars from five-color (u'g'r'i'z') imaging data taken along the Celestial Equator by the Sloan Digital Sky Survey (SDSS) during its commissioning phase. In this paper, we present 22 high-redshift quasars (z>3.6) discovered from ~250 deg^2 of data in the spring Equatorial Stripe, plus photometry for two previously known high-redshift quasars in the same region of sky. Our success rate of identifying high-redshift quasars is 68%. Five of the newly discovered quasars have redshifts higher than 4.6 (z=4.62, 4.69, 4.70, 4.92 and 5.03). All the quasars have i* < 20.2 with absolute magnitude -28.8 < M_B < -26.1 (h=0.5, q_0=0.5). Several of the quasars show unusual emission and absorption features in their spectra, including an object at z=4.62 without detectable emission lines, and a Broad Absorption Line (BAL) quasar at z=4.92.
|
