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IRAS galaxies versus POTENT mass - Density fields, biasing, and OmegaA comparison of the galaxy density field extracted from a complete redshift survey of IRAS galaxies brighter than 1.936 Jy with the mass-density field reconstructed by the POTENT procedure from the observed peculiar velocities of 493 objects is presented. A strong correlation is found between the galaxy and mass-density fields; both feature the Great Attractor, part of the Perseus-Pisces supercluster, and the large void between them. Monte Carlo noise simulations show that the data are consistent with the hypotheses that the smoothed fluctuations of galaxy and mass densities at each point are proportional to each other with the 'biasing' factor of IRAS galaxies, b(I), and that the peculiar velocity field is related to the mass-density field as expected according to the gravitational instability theory. Under these hypotheses, the two density fields can be related by specifying b(I) and the cosmological density parameter, Omega.
Document ID
19930062304
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Dekel, Avishai
(CNRS Inst. d'Astrophysique; Paris, Observatoire, France)
Bertschinger, Edmund
(MIT Cambridge, MA, United States)
Yahil, Amos
(CNRS Inst. d'Astrophysique; Paris, Observatoire, France)
Strauss, Michael A.
(Inst. for Advanced Study Princeton, NJ, United States)
Davis, Marc
(California Univ. Berkeley, United States)
Huchra, John P.
(Harvard-Smithsonian Center for Astrophysics Cambridge, MA, United States)
Date Acquired
August 16, 2013
Publication Date
July 20, 1993
Publication Information
Publication: Astrophysical Journal, Part 1
Volume: 412
Issue: 1
ISSN: 0004-637X
Subject Category
Astrophysics
Accession Number
93A46301
Funding Number(s)
CONTRACT_GRANT: NSF AST-90-01762
CONTRACT_GRANT: NAG5-1228
CONTRACT_GRANT: NAGW-1320
CONTRACT_GRANT: NSF PHY-82-17853
CONTRACT_GRANT: NSF PHY-91-06210
CONTRACT_GRANT: NSF PHY-88-00801
CONTRACT_GRANT: NAGW-201
CONTRACT_GRANT: NSF AST-87-02899
Distribution Limits
Public
Copyright
Other

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