Systematics of quasi-stellar-object spectra

Details Systematics of quasi-stellar-object spectra Systematics of quasi-stellar-object spectra

Mar 1984

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984aj.....89..311l&link_type=abstract

Astronomical Journal (ISSN 0004-6256), vol. 89, March 1984, p. 311-315.

Mathematics

Probability

3

Astronomical Spectroscopy, Line Spectra, Quasars, Absorption Spectra, Astronomical Catalogs, Random Numbers, Red Shift

Scientific paper

The authors have studied 13 QSOs measured by others. They have numbers of absorption lines ranging from 21 to 139 lines each with an average of 73 lines per QSO. For each QSO they use the redshift determined from its emission lines to blueshift its absorption lines to its rest system. Then in the rest systems, 60 lines each occur in five or more QSOs within a wavelength interval of 1.4 Å or less; of these, 55 lines each occur in five or more QSOs within a wavelength interval of 1.0 Å or less. To estimate the probability that this agreement is chance, the authors have compared appropriate sets of random numbers and, using several such sets, find 13 random quintuplets within a wavelength interval of 1.0 Å compared with 55 quintuplets in the measured lines. They conclude that the measured lines appear to have identical significance suggesting that most of the absorptions are intrinsic in the QSOs and not in space between QSOs and Earth.

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