Mathematics – Logic
Scientific paper
Jul 1999
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999cotph..32..155p&link_type=abstract
Commun. Theor. Phys., Vol. 32, No. 1, p. 155 - 160
Mathematics
Logic
1
Elliptical Galaxies: Evolution, Elliptical Galaxies: Cosmology, Elliptical Galaxies: Luminosities
Scientific paper
The traditional single burst and passive evolution model for elliptical galaxies should not be accepted. In this paper the authors demonstrate further by comparison of the model predictions with the observed B-K color distribution of galaxies, that the internal extinction by dust cannot save the traditional scenario for ellipticals either. Hence they do not agree with Zepf's (1997) argument that such a scenario could still survive if ellipticals might have formed in dusty starburst environments. Furthermore, the authors have also found that the luminosity evolution within the population of ellipticals should be strong, complicated or multiple, which is not favored by their previous study of number counts for ellipticals. The conflicting results simply suggest that the pure luminosity evolution model should not be accepted, and hence the number evolution for ellipticals is a straightforward inference. Their conclusions hold in any one of the three cosmological models, i.e., flat, open, or Λ-dominated, under consideration.
Ping He
Zhang Yuanzhong
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