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An unusual broad line profile in the QSO + 144 - Evidence for an optical jet?
, 1988 Wei Zheng, E. M. Burbidge
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Nature, 1974 WE have completed a series of observations at Jodrell Bank on the radio structures of a complete sample of QSO candidates identified from the Parkes ±4° equatorial survey. Four sources are of particular interest in that they have properties which lead us to suggest that they may be QSOs of unusually high redshift.
Browne, Ian +5 more
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Nature, 1972
IN a recent issue of Nature1 the opinion was expressed that the lack of observed blueshifts for quasars essentially rules out local origin. While this may be a valid objection to some forms of local theory, it is not so for the very local theory in which quasars were ejected a few million years ago from the centre of our Galaxy, the nearest being only ...
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IN a recent issue of Nature1 the opinion was expressed that the lack of observed blueshifts for quasars essentially rules out local origin. While this may be a valid objection to some forms of local theory, it is not so for the very local theory in which quasars were ejected a few million years ago from the centre of our Galaxy, the nearest being only ...
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Discrepant Redshifts of QSOs in Clusters of Galaxies and a Close QSO Pair
Nature, 1973The question is investigated whether QSO redshifts are cosmological in origin, taking into account the possibility that QSOs may be more local objects. A search is made for situations in which more than one blue stellar object (BSO) lay close to a radio position selected from the 4C catalog.
Hazard, C. +4 more
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Astrophysics and Space Science, 1980
In this paper independent evidence in favour of the hypothesis proposed by Thakur and Sapre (1979) that a QSO consists of a bright central object embedded in an extended nebulosity has been presented. αU−B and αB−V, the spectral indices in (U-B) and (B-V) colours, have been calculated for a sample of 80 QSOs with redshiftz≧0.76. In Figure 1 Δα = (αB−V −
R. K. Sood, R. K. Thakur
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In this paper independent evidence in favour of the hypothesis proposed by Thakur and Sapre (1979) that a QSO consists of a bright central object embedded in an extended nebulosity has been presented. αU−B and αB−V, the spectral indices in (U-B) and (B-V) colours, have been calculated for a sample of 80 QSOs with redshiftz≧0.76. In Figure 1 Δα = (αB−V −
R. K. Sood, R. K. Thakur
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Astrophysics and Space Science, 1980
Statistical arguments for the reality of physical associations between a class of QSO's and certain peculiar galaxies are now sufficiently convincing to require an explanation for the nature of the associations. If the associations are indeed real, the objects were probably liberated by tidal encounters between galaxies, rather than by explosive ...
S. T. Gottesman, R. E. Wilson
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Statistical arguments for the reality of physical associations between a class of QSO's and certain peculiar galaxies are now sufficiently convincing to require an explanation for the nature of the associations. If the associations are indeed real, the objects were probably liberated by tidal encounters between galaxies, rather than by explosive ...
S. T. Gottesman, R. E. Wilson
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The Chemical Evolution of QSOs
1994Abstract One zone chemical evolution models are developed for application to QSO broad emission line regions. The elemental abundances derived from the broad line ratios imply that the gas is highly evolved, with metallicities ranging from ∼1 to ≳ 10 times solar. The short timescales (i.e.
Fred Hamann, Gary J. Ferland
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The Environment of QSOs (Invited Review)
Astrophysics and Space Science, 1986The evidence for the association of QSOs with groups of galaxies and the available data on the global properties of such groups are reviewed. At least for redshifts less than 0.5, QSOs tend to occur in richer-than-average environments. There is some evidence that groups around steep-radio-spectrum QSOs are systematically richer than those around radio ...
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