• Nombre : ZSPARC: THE Z-SPEC/APEX REDSHIFT CAMPAIGN FOR H-ATLAS
• Número/Código : 2011A-15
• Nombre Concurso : CONCURSO PROPUESTAS DE OBSERVACIÓN ASTRONÓMICAS PARA TIEMPO CHILENO EN EL TELESCOPIO APEX 2011-A
• Año Concurso : 2011
• Tiempo asignado : 24 HORAS

We have uncovered a population of uniquely bright, FIR-selected galaxies in H-ATLAS, the widest extragalactic Herschel survey. Helped by gravitational amplification we can study the galaxies that dominate the cosmological FIR background and the starformation- rate density at z _ 2. We propose to observe selected lensed SMGs with S350μm > 150mJy at 1.5 < z < 2.5, the major epoch of galaxy/AGN activity, and Z-Spec's
sweet spot. We will obtain redshifts and derive CO SLEDs with Z-Spec. We shall determine gas properties via the CO ladder, and explore the influence of AGN, while relatively immune to uncertainties in the lensing models. With Z-Spec redshifts in hand, we can use ALMA and EVLA (ultimately JWST and E-ELT) to map their internal structures on sub-kpc scales, testing the FIR/radio correlation, Larson's laws and the Schmidt- Kennicutt relation, all on the scale of individual GMCs within the galaxies. The sub-project proposed here, led by Chileans, and to be published as Orellana et al., is composed by three targets that will complement the H-ATLAS campaign. The program proposed here will lead to a long term APEX/ALMA collaboration between UdeC and the H-ATLAS team members.