The red/infrared evolution in galaxies - Effect of the stars on the asymptotic giant branch

Astronomy and Astrophysics – Astrophysics

Scientific paper

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Astronomical Models, Asymptotic Giant Branch Stars, Galactic Evolution, Giant Stars, Infrared Spectra, Late Stars, Radio Spectra, Hubble Diagram, Pre-Main Sequence Stars, Red Shift, Stellar Color, Stellar Luminosity, Stellar Mass

Scientific paper

The effect of including the asymptotic giant branch (AGB) population in a spectral synthesis model of galaxy evolution is examined. Stars on the AGB are luminous enough and also evolve rapidly enough to affect the evolution of red and infrared colors in galaxies. The validity of using infrared colors as distance indicators to galaxies is then investigated in detail. The authors find that for z ≤ 1 infrared colors of model galaxies behave linearly with redshift.

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