Statistics – Computation
Scientific paper
Nov 1989
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989apj...346...28y&link_type=abstract
Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 346, Nov. 1, 1989, p. 28-33. Research supported by the Australian Academy o
Statistics
Computation
11
Computational Astrophysics, Cosmology, Galactic Evolution, Red Shift, Astronomical Spectroscopy, Galactic Structure, Luminosity, Spectral Energy Distribution, Star Formation
Scientific paper
The systematic bias due to galaxy evolution in the red-shift volume measurement of the cosmological deceleration parameter q(0) is investigated. Galaxies are classified into five types, E/SO, Sab, Sbc, Scd, and Sdm, which evolve with different star formation histories. The red-shift volume test in the light of galaxy evolution is considered by using the type-dependent evolution models by Arimoto and Yoshii. It is found that for z less than 1, the bias Delta q is mostly equal to -0.2 if the parameters for local luminosity function of galaxies are adopted in the analysis. To determine q(0) within this accuracy it is indispensable to obtain a sample of redshifts for galaxies as deep as m(lim) = about 23 mag at 650 nm or m(lim) = about 24 mag at 800 nm.
Takahara Fumio
Yoshii Yuzuru
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