György Paál

The native form of this personal name is Paál György. This article uses the Western name order.

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

Work

In the late 50-s Paál studied the quasar and galaxy cluster distributions. In 1970 from redshift quantization he came up with the idea that the Universe might has 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 \Omega_{\Lambda} \simeq 2/3.[6] Later observations confirmed this value.[7]

Membership

Cosmological Committee of IAU[1]

Awards

László Detre award.

See also

References

  1. ↑ 1.0 1.1 http://members.iif.hu/visontay/ponticulus/rovatok/limes/bartha-magyar-csillagaszok.html
  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. ↑ 3.0 3.1 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.
  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.