by
Ignacio Trujillo(Instituto de Astrofísica de Canarias)
→
Europe/Stockholm
FA31
FA31
Description
will present recent results of our group on the size evolution of galaxies. The talk will be splitted in two parts. On the first half I will show how spiral galaxies has grown in size since z~1 by exploring the evolution of their stellar disk truncations. I will discuss radial color gradients and how they evolve with time. Our results constraint several galaxy disk formation models and favor a scenario where stars are formed inside the break radius and are relocated in the outskirts of galaxies through secular processes. On the second half I will concentrate on the more massive galaxies. I will show that the size evolution of these galaxies has been dramatic since z=3. At z>1, the most massive galaxies in the Universe were extremely compact, with stellar densities that are similar to present day globular clusters. Different size evolutionary mechanisms will be discussed. (Host: Kambiz Fathi)
