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Is the Probability of Occurrence of Absorption Lines in QSOs a Function of Redshift
R. J. Weymann,R. C. Wilcox +1 more
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In this article, it has been shown that the occurrence of absorption lines in quasi-stellar objects appears to increase with increasing red-shift, and it is possible that the correlation is merely the result of stronger lines being brought into the observable spectrum as the redshift increases.Abstract:
IT has been noted1–3 that the occurrence of absorption lines in quasi-stellar objects appears to increase with increasing red-shift. This has suggested that QSOs with high red-shift have intrinsically different properties than those with low red-shift. McCrea2, for example, found that 53 per cent of the QSOs with emission red-shift zem > 1.8 have absorption lines; 17 per cent with 1.0 < zem < 1.8 have absorption lines, and only 8 per cent with zem < 1.0. This correlation, however, has been found, using all the observed absorption lines, and it is possible that the correlation is merely the result of stronger lines being brought into the observable spectrum as the red-shift increases. A proper test for such a correlation requires the use of a single line, or else the difference in strengths of lines in different parts of the spectrum should be allowed for.read more
References
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The quasi-stellar objects
TL;DR: In this paper, it was shown that a very large amount of energy must be present in the sources in the form of highly relativistic electrons (and possibly positrons) and magnetic flux.
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Red-shifts of Quasi-stellar Objects and Related Extragalactic Systems
Geoffrey Burbidge,E. M. Burbidge +1 more
TL;DR: Quasi-stellar and related objects emission and absorption red shifts tabulation suggesting absorption lines origin this article suggest that absorption lines originate from the Earth's magnetic field and not the Sun.
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Spectroscopic and photometric data for a sample of quasi-stellar objects identified by their infrared excess.
A. Braccesi,R. Lynds,A. Sandage +2 more
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Further observations of quasi-stellar objects with absorption-line spectra - Ton 1530, PKS 0237-23, and PHL 938.
TL;DR: Quasi-stellar objects with emission line red shifts having multiple absorption line red shift have been found to have multiple absorption lines red shifts as mentioned in this paper, where the absorption lines correspond to the emission lines of the red shifts.
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Quasi-stellar objects with absorption lines.
TL;DR: In this paper, the authors employ the observational results tabulated by Burbidge et al. for further information on almost all matters relevant to their discussion, based on the assumption that the red-shift z in the spectrum of a quasi-stellar object is cosmological, apart from a modification mentioned later.