34 research outputs found
Níveis de lisina digestível e zinco quelato sobre os parâmetros produtivos de poedeiras marrons
Energy and amino acid content in phase 1 nursery diet: piglet performance and body chemical composition
Estirpes de Bradyrhizobium em simbiose com guandu-anão em casa de vegetação e no campo
Variação temporal do fitoplâncton de um lago pertencente à Área de Proteção Permanente no estado de Alagoas, nordeste do Brasil
Immunity to a challenge infection of Strongyloides stercoralis third-stage larvae in the jird
An ACA 1 mm survey of HzRGs in the ELAIS-S1 : survey description and first results
Radio-emitting jets might be one of the main ingredients shaping the evolution of massive galaxies in the Universe since early cosmic times. However, identifying early radio active galactic nuclei (AGNs) and confirming this scenario have been hard to accomplish, with studies of samples of radio AGN hosts at z > 2 becoming routinely possible only recently. With the above in mind, we have carried out a survey with the Atacama Compact Array (ACA or Morita Array) at 1.3 mm (rms = 0.15 mJy) of 36 high-redshift radio AGN candidates found within 3.9 deg2 in the ELAIS-S1 field. The work presented here describes the survey and showcases a preliminary set of results. The selection of the sample was based on three criteria making use of infrared (IR) and radio fluxes only. The criterion providing the highest selection rate of high-redshift sources (86 per cent at z > 0.8) is one combining an IR colour cut and radio flux cut (S5.8μm/S3.6μm > 1.3 and S1.4GHz > 1 mJy). Among the sample of 36 sources, 16 show a millimetre (mm) detection. In eight of these cases, the emission has a non-thermal origin. A zsp = 1.58 object, with a mm detection of non-thermal origin, shows a clear spatial offset between the jet-dominated mm continuum emission and that of the host's molecular gas, as traced by serendipitously detected CO(5-4) emission. Among the objects with serendipitous line detections there is a source with a narrow jet-like region, as revealed by CS(6-5) emission stretching 20 kpc out of the host galaxy