منابع مشابه
Quasar - galaxy associations ?
There is controversy about the measurement of statistical associations between bright quasars and faint, presumably foreground galaxies. We look at the distribution of galaxies around an unbiased sample of 63 bright, moderate redshift quasars using a new statistic based on the separation of the quasar and its nearest neighbour galaxy. We nd a signiicant excess of close neighbours at separations...
متن کاملQuasar-Galaxy Associations from Gravitational Lensing: Revisited
The theoretically expected amplitude of the associations of background quasars with foreground galaxies as a result of gravitational lensing has been updated in this paper. Since the galactic matter alone yields an amplitude of quasar overdensity smaller than that observed, a special attention has been paid to the examination or re-examination of the uncertainties in the estimate of the quasar ...
متن کاملRedshift Components of Apparent Quasar-Galaxy Associations: A Parametric Model
The components that are known to physically contribute to an object’s observed redshift are reviewed. Then, using a postulated galactic ejection model for quasars, and previously derived results from electromagnetic scattering theory which have been experimentally verified, a parametric extrapolation of these redshift components is presented. The model shows that high quasar redshift magnitudes...
متن کاملA further discussion on quasar-galaxy associations from gravitational lensing
Quasar-galaxy associations, if they result from the effect of gravitational lensing by foreground galaxies, depend sensitively on the shape of the quasar number counts. Two kinds of quasar number-magnitude relations are predicted to produce quite different properties in quasar-galaxy associations: the counts of Boyle, Shanks and Peterson (1988; BSP) provide both positive and “negative” associat...
متن کاملLoud Quasar Lobe Dominated Radio Loud Quasar Radio Galaxy Broad
In this second paper, in a series of two, we determine the properties of the stellar torus that we showed in the first paper to result as a product of two merging black holes. If the surrounding stellar cluster is as massive as the binary black hole, the torque acting on the stars ejects a fraction which extracts the binary’s angular momentum. After the black holes coalesced on scales of ∼ 10 y...
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ژورنال
عنوان ژورنال: Monthly Notices of the Royal Astronomical Society
سال: 1995
ISSN: 0035-8711,1365-2966
DOI: 10.1093/mnras/273.4.1069