Abstract
In order to constrain - and understand - the growth of galaxies, we present a sample of ∼ 30 galaxies at z ∼ 2 with resolved distribution of stellar mass, star-formation rate, and dust attenuation on scales of ∼ 1 kpc. We find that low- and intermediate-mass galaxies grow self-similarly, doubling their stellar mass in the centers and outskirts with the same pace. More massive galaxies (∼ 1011 MȮ) have a reduced star-formation activity in their center: they grow mostly in the outskirts (inside-out quenching / formation). Similar trends are find in cosmological zoom-in simulations, highlighting that high stellar mass densities are formed in a gas-rich compaction phase. This nuclear 'starburst' phase is followed by a suppressed star-formation activity in the center, resulting in growth of the outskirts. All in all, we put forward that we witness at z ∼ 2 the dissipative formation of z = 0 M∗ early-type galaxies.
| Original language | English |
|---|---|
| Pages (from-to) | 327-329 |
| Number of pages | 3 |
| Journal | Proceedings of the International Astronomical Union |
| Volume | 11 |
| Issue number | S321 |
| DOIs | |
| State | Published - 1 Mar 2016 |
Bibliographical note
Publisher Copyright:© 2017 International Astronomical Union.
Keywords
- cD
- galaxies: bulges
- galaxies: elliptical and lenticular
- galaxies: evolution
- galaxies: formation
- galaxies: fundamental parameters
- galaxies: high-redshift
- galaxies: structure