György Paál

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

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

Work[]

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] [3] These are the oldest papers that associate real observations with the possibility that our universe could have nontrivial topology.[4]

In 1992, G. Paal, et al. [5] and A. Holba, et al. [6] 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.[5] suggested non-zero cosmological constant. Two years later in another paper[7] they suggested .[8] Though later observations confirmed this value,[9] the redshift quantization of quasars, which Paál et al. (1992)'s arguments were based on, is generally considered to be a false-positive caused by selection effect.[10]

Membership[]

Cosmological Committee of IAU[1]

Awards[]

László Detre award.

See also[]

References[]

  1. ^ Jump up to: a b http://members.iif.hu/visontay/ponticulus/rovatok/limes/bartha-magyar-csillagaszok.html
  2. ^ Paál, G. (1970). "Red shifts and Quasars". Science Journal. 6 (6): 101.
  3. ^ Paál, G. (1971). "The global structure of the universe and the distribution of quasi-stellar objects". . 30: 51–54. Bibcode:1971AcPhH..30...51P. doi:10.1007/bf03157173. S2CID 118710050.
  4. ^ Luminet, Jean-Pierre; Lachièze-Rey, Marc (1995). "Cosmic Topology". Physics Reports. 254 (3): 135–214. arXiv:gr-qc/9605010. Bibcode:1995PhR...254..135L. doi:10.1016/0370-1573(94)00085-h. S2CID 119500217.
  5. ^ Jump up to: a b Paál, G.; Horváth, I.; Lukács, B. (1992). "Inflation and compactification from Galaxy redshifts?". Astrophysics and Space Science. 191 (1): 107–124. Bibcode:1992Ap&SS.191..107P. doi:10.1007/BF00644200. S2CID 116951785.
  6. ^ Holba, Ágnes; Horváth, I.; Lukács, B.; Paál, G. (1992). "Cosmological parameters and redshift periodicity". Astrophysics and Space Science. 198 (1): 111–120. Bibcode:1992Ap&SS.198..111H. doi:10.1007/BF00644305. S2CID 118806486. 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. S2CID 4356867.
  7. ^ Holba, Ágnes; Horváth, I.; Lukács, B.; Paál, G. (1994). "Once more on quasar periodicities". Astrophysics and Space Science. 222 (1–2): 65–83. Bibcode:1994Ap&SS.222...65H. doi:10.1007/BF00627083. S2CID 118379051.
  8. ^ Horváth, I. (2012). "Early publications about nonzero cosmological constant". arXiv:1203.6903. Bibcode:2012arXiv1203.6903H. Cite journal requires |journal= (help)
  9. ^ 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. S2CID 118910636.
  10. ^ Tang, S. M.; Zhang, S.N. (2005). "Critical Examinations of QSO Redshift Periodicities and Associations with Galaxies in Sloan Digital Sky Survey Data". The Astrophysical Journal. 633 (1): 41–51. arXiv:astro-ph/0506366. Bibcode:2005ApJ...633...41T. doi:10.1086/432754.
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