The size and mass evolution of the massive galaxies over cosmic time
Abstract
Once understood as the paradigm of passively evolving objects, the discovery that massive galaxies experienced an enormous structural evolution in the last ten billion years has opened an active line of research. The most significant pending question in this field is the following: which mechanism has made galaxies to grow largely in size without altering their stellar populations properties dramatically? The most viable explanation is that massive galaxies have undergone a significant number of minor mergers which have deposited most of their material in the outer regions of the massive galaxies. This scenario, although appealing, is still far from be observationally proved since the number of satellite galaxies surrounding the massive objects appears insufficient at all redshifts. The presence also of a population of nearby massive compact galaxies with mixture stellar properties is another piece of the puzzle that still does not nicely fit within a comprehensive scheme. I will review these and other intriguing properties of the massive galaxies in this contribution.
Keywords
Cite
@article{arxiv.1211.3771,
title = {The size and mass evolution of the massive galaxies over cosmic time},
author = {Ignacio Trujillo},
journal= {arXiv preprint arXiv:1211.3771},
year = {2015}
}
Comments
10 pages, 5 figures. Invited talk for the IAU Symposium 295 "The Intriguing Life of Massive Galaxies". To appear in Proc. of the XXVIII IAU General Assembly, Beijing, China, August 2012, eds. D. Thomas, A. Pasquali; I. Ferreras. Cambridge University Press. This is a very fast developing field. The present version describes the status of the area by August 2012