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CONCURSO PROPUESTAS DE OBSERVACIÓN ASTRONÓMICAS PARA TIEMPO CHILENO EN EL TELESCOPIO APEX 2011 - B - 2011 - 2011B-50
ZSPARC: THE Z-SPEC/APEX REDSHIFT CAMPAIGN FOR H-ATLAS: THE CHILEAN SUB-SAMPLE
  • Nombre : ZSPARC: THE Z-SPEC/APEX REDSHIFT CAMPAIGN FOR H-ATLAS: THE CHILEAN SUB-SAMPLE
  • Número/Código : 2011B-50
  • Nombre Concurso : CONCURSO PROPUESTAS DE OBSERVACIÓN ASTRONÓMICAS PARA TIEMPO CHILENO EN EL TELESCOPIO APEX 2011 - B
  • Año Concurso : 2011
  • Tiempo Asignado : 24 horas

It is no surprise that the largest extragalactic Herschel survey, H-ATLAS, has provided by far the brightest sample of lensed FIR galaxies. Sub-100-deg2 surveys miss the rarest high-amplification systems. As demonstrated by our success rate with Z-Spec observations in January, our Z-spec sample allows us to study the galaxies that dominate the FIR background and the star-formation-rate density at the peak epoch of starburst/AGN activity. By June, Herschel will have covered the largest H-ATLAS field (SGP, 260 deg2, 22 < _ < 02h; _ _ 30◦). We can thus select even brighter SMGs, obtaining redshifts, determining their gas properties via the CO ladder and exploring the influence of AGN, whilst relatively immune to uncertainties in the lensing models. With ZSpec redshifts in hand, we will have the ultimate sample to exploit ALMA, mapping their sub-kpc internal structures, in powerful diagnostic transitions such as [C ii], 13CO and C18O, on the scale of individual GMCs. The sub-project proposed here, led by Chileans, and to be published as Orellana et al. is complementary to an ESO application by the HATLAS team. The program proposed here will lead to a long term collaboration between UdeC and the H-ATLAS team.

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