Ésta es la página personal de Ignacio Trujillo, quién se compromete a respetar el código de conducta informático del IAC y las normas sobre ética y corrección de uso de la RedIris. El Instituto de Astrofísica de Canarias (IAC) no se identifica necesariamente con las opiniones ni con los contenidos aquí incluidos, que son responsabilidad única del autor.

How to contact: Dr. Ignacio Trujillo Instituto de Astrofísica de Canarias Vía Láctea, s/n 38200 La Laguna Tenerife Spain  Email: Tel.:+34-922-605316 Fax:+34-922-605200

Research Publications

---

Last update: 10.05.07

NEWStrong size evolution of the most massive galaxies since z~2

Nine billions years ago massive spheroid-like objects were much smaller than those we see today. These small sized, high mass galaxies do not exist in the nearby universe, suggesting this population merged with other galaxies over several billion years to form the largest galaxies we see today.
                                                               

Size evolution of equal stellar mass objects at different lookback times (from top-right to bottom-left: 3.9, 5.3, 7.4,  9.0, 9.7 and 10.3 Gyr back respectively). Effective radii are given in kpc and stellar masses in 10¹¹ solar masses units. Galaxies are shown with different surface brightness limits to account for the cosmological surface brightness dimming. The solid line indicates one arcsec angular size.