Downsizing among disk galaxies and the role of the environment

Details Downsizing among disk galaxies and the role of the environment Downsizing among disk galaxies and the role of the environment

2009-01-19

arxiv.org/abs/0901.2879v1

Astronomy and Astrophysics

Astrophysics

Galaxy Astrophysics

To appear in "A long walk through astronomy". RevMexAA

Scientific paper

The study of PopI and PopII indicators in galaxies has a profound impact on our understanding of galaxy evolution. Their present (z=0) ratio suggests that the star formation history of galaxies was primarily dictated by their global mass. Since 1989 Luis Carrasco and I spent most of our sleepless nights gathering H_alpha and near infrared surface photometry of galaxies in the local Universe and focused most of our scientific career on these two indicators trying to convince the community that the mass was the key parameter to their evolution. We were unsuccessful, until in 2004 the Sloan team rediscovered this phenomenon and named it "downsizing"

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