Astronomy and Astrophysics – Astrophysics
Scientific paper
Jul 1978
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1978ap%26ss..56..443b&link_type=abstract
Astrophysics and Space Science, vol. 56, no. 2, July 1978, p. 443-451. Research supported by the University Grants Commission.
Astronomy and Astrophysics
Astrophysics
3
Emission Spectra, Laser Plasmas, Quasars, Stellar Atmospheres, Stellar Models, Stellar Spectra, Doppler Effect, Laser Outputs, Line Spectra, Plasma Spectra, Red Shift
Scientific paper
Varshni's (1975) proposed solution to the QSO problem is discussed whereby QSOs are considered as local objects in which the emission lines are due to laser action and have no redshift. A comparison of emission lines observed in 633 QSOs with known laboratory laser lines reveals that various QSO and laser lines coincide to within different tolerances (from 13.6% to within 0 A to 94.3% to within 20 A). In the framework of Varshni's hypothesis the observed broadening of QSO emission lines is attributed to the Stark effect. It is noted that while the hypothesis considered is able to explain QSO emission lines, it cannot account for the observed absorption redshifts. It is suggested that the determination of absorption redshifts may not be correct and that QSO absorption lines may have some hitherto unknown origin.
Banerji Sudhansukumar
Bhar G. C.
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