Environmental Effects in the Structural Parameters of Galaxies in the Coma Cluster

Aguerri, J. A. L.; Iglesias-Paramo, J.; Vilchez, J. M.; Muñoz-Tuñón, C.
Referencia bibliográfica

The Astronomical Journal, Volume 127, Issue 3, pp. 1344-1359.

Fecha de publicación:
3
2004
Número de autores
4
Número de autores del IAC
2
Número de citas
61
Número de citas referidas
56
Descripción
We have studied 116 bright galaxies from the Coma Cluster brighter than mr=17 mag. From a quantitative morphological analysis we find that the scales of the disks are smaller than those of field spiral galaxies. There is a correlation between the scale of the disks and the position of the galaxy in the cluster; no large disks are present near the center of the cluster or in high-density environments. The structural parameters of the bulges are not affected by the environment. We have analyzed the distribution of blue and red objects in the cluster. For spirals there is a trend between color and position in the cluster. The bluest spiral galaxies are located at larger projected radii; they also show larger velocity dispersions than the red ones. The differences in the scale of the disks between cluster galaxies and local samples of isolated galaxies and the color distribution of the objects can be understood in terms of the harassment scenario.