Quasar colors - Statistics and cosmological evolution

Details Quasar colors - Statistics and cosmological evolution Quasar colors - Statistics and cosmological evolution

Apr 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990apj...353...24g&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 353, April 10, 1990, p. 24-33. Research supported by MPI and CNR.

Statistics

20

Astronomical Photometry, Color, Cosmology, Evolution (Development), Quasars, Spectrophotometry, Astronomical Models, Color-Color Diagram, Emission Spectra, Monte Carlo Method, Red Shift

Scientific paper

A model spectrum is constructed to study QSO broadband colors as a function of redshift. The available statistical data are used to generate realistic color distributions that give quantitative estimates of the incompleteness associated with the various color selection techniques as a function of redshift. Also developed is a simple model for the average Lyman-continuum absorption, based on the statistics of the Ly-alpha clouds, to explore the resulting colors of high-redshift QSOs. Selection biases on the estimate of QSO density at high redshift are also discussed.

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