A redshift survey of IRAS galaxies. II. Methods for determining self-consistent velocity and density fields

Amos Yahil, Michael A. Strauss, Marc Davis, John P. Huchra

Research output: Contribution to journalReview articlepeer-review

171 Scopus citations

Abstract

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.

Original languageEnglish (US)
Pages (from-to)380-393
Number of pages14
JournalAstrophysical Journal
Volume372
Issue number2
DOIs
StatePublished - May 10 1991

All Science Journal Classification (ASJC) codes

  • Astronomy and Astrophysics
  • Space and Planetary Science

Keywords

  • Galaxies: redshifts
  • Infrared: sources
  • Luminosity function

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