Photometric and redshift surveys are a key tool for cosmology. They allow to follow the evolution of galaxies from high-z to the local universe to understand their nature: how they formed, how they evolve. From the comparison with models of galaxy formation and evolution it is possible to understand what are the main physical mecanisms at play and the associ ated timescales.

Galaxy surveys at OABO

• Optical: VVDS, zCOSMOS, VIPERS
• Near-IR: K20, GMASS
• Mid/Far-FIR: ELAIS-S1, SWIRE
• Radio: VLA-VVDS, ATLAS-SWIRE, VLA-COSMOS

Future surveys and missions

• PACS Evolutionary Probe (PEP)
• SPACE

Main activities at OABO

Galaxy properties: Spectral classifications and evolution (age from spectra fitting) Photometric redshift, Stellar Mass, age, SF from multi-band photometry StarBurst vs. AGN contribution from optical/FIR SED fitting High-redshift galaxies: LBGs, EROs, BzK Ellipticals Fundamental Plane Galaxy counts and resolved optical Extragalactic Background Light Sub-mJy Radio population

Statistical studies: Evolution of Luminosity and Mass Function and Star/Mass Formation History Luminosity Function of starburst/AGN in the FIR Luminosity Function of radio sources and type1 AGN optically-selected

Modeling and comparison: Phenomenological models of galaxy evolution in optical/NIR/FIR Comparison with models and simulation (eg. GIF, GALICS, Millennium)

The main research topics of our group are:

• Optical: Evolution of optical luminosity Function and SFH up to z=1.5
• Near-IR: Evolution of the NIR LF & Stellar Mass Function and Mass density up to z=2; Evolution of early-type galaxies at z >= 1
• Mid/Far-IR: Luminosity Function at 15 micron up to z=1
• Radio: Sub-mJy populations

International collaborations

• COSMOS PI N. Scoville (Caltech)
• zCOSMOS; S. Lilly (ETH Zurigo); XMM-COSMOS G. Hasinger (MPE)
• VLA-COSMOS E. Schinnerer (Heidelberg)
• VVDS O. Le Fevre (Marseille); T. Contini (Toulose)
• ELAIS-S1 M. Rowan Robinson
• SWIRE C. Lonsdale
• VIPERS L. Guzzo (OA Brera)