Evolution of the luminosity function and colours of galaxies in a Λ cold dark matter universe | Zendy

Nagamine K. | Zendy; Fukugita M. | Zendy; Cen R. | Zendy; Ostriker J.P. | Zendy

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Evolution of the luminosity function and colours of galaxies in a Λ cold dark matter universe

Author(s) -

Nagamine K.,

Fukugita M.,

Cen R.,

Ostriker J.P.

Publication year - 2001

Publication title -

monthly notices of the royal astronomical society

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 2.058

H-Index - 383

eISSN - 1365-2966

pISSN - 0035-8711

DOI - 10.1046/j.1365-8711.2001.04905.x

Subject(s) - physics , astrophysics , luminosity function , mass to light ratio , astronomy , cold dark matter , galaxy , dark matter , luminosity , dark matter halo , galaxy formation and evolution , redshift , halo

The luminosity function of galaxies is derived from a cosmological hydrodynamic simulation of a Λ cold dark matter universe with the aid of a stellar population synthesis model. At , the resulting B ‐band luminosity function has a flat faint‐end slope of with the characteristic luminosity and the normalization in fair agreement with observations, while the dark matter halo mass function is steep with a slope of . The colour distribution of galaxies also agrees well with local observations. We also discuss the evolution of the luminosity function, and the colour distribution of galaxies from to 5. A large evolution of the characteristic mass in the stellar mass function as a result of number evolution is compensated by luminosity evolution; the characteristic luminosity increases only by 0.8 mag from to 2, and then declines towards higher redshift, while the B ‐band luminosity density continues to increase from to 5 (but only slowly at .

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