Statistics – Computation
Scientific paper
May 1991
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991apj...372..380y&link_type=abstract
Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 372, May 10, 1991, p. 380-393. NSF-supported research.
Statistics
Computation
185
Cosmology, Density Distribution, Galaxies, Infrared Astronomy, Red Shift, Velocity Distribution, Computational Astrophysics, Infrared Astronomy Satellite, Luminosity, Sky Surveys (Astronomy), Spatial Distribution
Scientific paper
Methods are presented for deriving the density field and the resulting linear-theory velocity field from an all-sky redshift survey of IRAS galaxies. The luminosity function of IRAS galaxies is measured using a maximum-likelihood technique independent of density inhomogeneities. Within its range of validity, it is found to be in excellent agreement with previously published luminosity functions. Self-consistent solutions for the true spatial positions of the IRAS galaxies are found, given their redshifts and peculiar velocities. The ambiguity inherent in triple-valued regions is overcome either by sufficient smoothing, or by using prior information from peculiar velocity maps obtained independently.
Davis Martin
Huchra John P.
Strauss Michael A.
Yahil Amos
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