Once more on quasar periodicities

Ágnes Holba, I. Horváth, B. Lukács, G. Paál

Research output: Article

4 Citations (Scopus)


In an earlier paper Arp, Bi, Chu and Zhu investigated various quasar samples and recognized a periodicity of remarkable degree in them. Their conclusion was that the existence of such a periodicity is a counterevidence against the cosmological origin of quasar redshifts. Since this question is of great importance in a cosmological context, here we reanalyze some of the samples together with a galaxy sample of the pencil-beam survey of Broadhurst et al. Our result is that on the plane of cosmological parameters (Ω0, λ0) there is a non-negligible region where two quasar samples and the galaxy sample are simultaneously fairly periodic. Pure periodicity is still compatible with cosmological principles, at least on length scales much longer than the period length. So the regularities can fit into a cosmological context.

Original languageEnglish
Pages (from-to)65-83
Number of pages19
JournalAstrophysics and Space Science
Issue number1-2
Publication statusPublished - dec. 1 1994

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science

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