György Paál

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György Paál (Budapest, 1934 – Budapest, 1992)[1] was a Hungarian astronomer and cosmologist.


In the late 1950s Paál studied the quasar and galaxy cluster distributions. In 1970 from redshift quantization he came up with the idea that the Universe might have nontrivial topological structure.[2]

In 1992, G. Paal, et al. [3] and A. Holba, et al. [4] reanalyzed the redshift data from a fairly large sample of galaxies and concluded that there was an unexplained periodicity of redshifts.

From the observed galaxy distribution in 1992 Paal et al.[3] suggested non-zero cosmological constant. Two years later in another paper[5] they suggested .[6] Later observations confirmed this value.[7]


Cosmological Committee of IAU[1]


László Detre award.

See also[edit]


  1. ^ a b
  2. ^ Paál, G. (1970). "The global structure of the universe and the distribution of quasi-stellar objects". Acta Physica Academiae Scientarium Hungaricae. 30: 51. Bibcode:1971AcPhH..30...51P. doi:10.1007/bf03157173.
  3. ^ a b Paál, G.; Horváth, I.; Lukács, B. (1992). "Inflation and compactification from Galaxy redshifts?". Astrophysics and Space Science. 191: 107. Bibcode:1992Ap&SS.191..107P. doi:10.1007/BF00644200.
  4. ^ Holba, Ágnes; Horváth, I.; Lukács, B.; Paál, G. (1992). "Cosmological parameters and redshift periodicity". Astrophysics and Space Science. 198: 111. Bibcode:1992Ap&SS.198..111H. doi:10.1007/BF00644305. See also reference to Broadhurst, T. J.; Ellis, R. S.; Koo, D. C.; Szalay, A. S. (1990). "Large-scale distribution of galaxies at the Galactic poles". Nature. 343 (6260): 726. Bibcode:1990Natur.343..726B. doi:10.1038/343726a0.
  5. ^ Holba, Ágnes; Horváth, I.; Lukács, B.; Paál, G. (1994). "Once more on quasar periodicities". Astrophysics and Space Science. 222: 65. Bibcode:1994Ap&SS.222...65H. doi:10.1007/BF00627083.
  6. ^ Horváth, I. (2012). "Early publications about nonzero cosmological constant". arXiv:1203.6903. Bibcode:2012arXiv1203.6903H.
  7. ^ Perlmutter, S.; et al. (June 1999). "Measurements of Omega and Lambda from 42 High-Redshift Supernovae". The Astrophysical Journal. 517 (2): 565–586. arXiv:astro-ph/9812133. Bibcode:1999ApJ...517..565P. doi:10.1086/307221.