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| Paper: |
Star Formation and Merging in Massive Galaxies at z < 2 |
| Volume: |
399, Panoramic Views of Galaxy Formation and Evolution |
| Page: |
190 |
| Authors: |
Conselice, C.J. |
| Abstract: |
Observing massive galaxies at various redshifts is one of the most straightforward and direct approaches towards understanding galaxy formation. There is now largely a consensus that the massive galaxy (M* > 1011 M⊙ ) population is fully formed by z ∼ 1, based on mass and luminosity functions. However, we argue that the latest data can only rule out number and mass density evolution of a factor of > 2 − 3 at z < 1.5. We furthermore show that the star formation history of M* > 1011 M⊙ galaxies reveals that 40±5% of galaxies with M* > 1011 M⊙ at z ∼ 1 are undergo star formation that effectively doubles their stellar mass between z = 0.4 − 1.4. These massive galaxies also undergo 0.9+0.7−0.5 major mergers during this same time period. |
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