We have studied the population-density relation in very sparse environments, from poor clusters to isolated galaxies, and we find that early-type galaxies with a young stellar population are preferably found in the lowest density environments. We show a marginal indication that this effect is due to an enhancement of the stellar formation independent of the morphological segregation, but we failed to find any effect from the internal dynamics.
@article{arxiv.astro-ph/9909481,
title = {Effect of the large scale environment on the internal dynamics of early-type galaxies},
author = {G. Maubon and Ph. Prugniel},
journal= {arXiv preprint arXiv:astro-ph/9909481},
year = {2007}
}
Comments
2 pages, 2 figures, to appear in "Galaxy Dynamics: from the Early Universe to the Present", ASP Conf Series, ed. F. Combes, G. Mamon, V. Charmandaris Unmatched "