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http://hdl.handle.net/20.500.12386/25148
Titolo: | AGN populations in GOODS-N through eMERGE ultra-deep JVLA observations | Autori: | GUIDETTI, DARIA BONDI, MARCO PRANDONI, ISABELLA Beswick, R. J. Muxlow, T. W. B. Wrigley, N. Smail, I. R. McHardy, I. Ivison, R. eMERGE Collaboration |
Data pubblicazione: | 2016 | Titolo del volume in cui è pubblicato il poster: | Active Galactic Nuclei: What's in a Name? | Da pagina:: | 38 | Abstract: | Multi-wavelength studies of deep radio fields show a composite population of star-forming galaxies, radio-quiet and radio-loud AGNs, with the formers dominating at the lowest flux densities (< 100 microJy). However, the exact mixture between these types of radio sources is still matter of debate. The most direct way to identify faint AGN-driven radio emission is the detection of embedded radio cores in the host galaxies, through ultra-deep and very high resolution radio observations. This would open the perspective of studying the whole AGN population in the radio band, including the radio-quiet component traditionally selected at other wavelengths (opt/IR/X-ray). Assessing the faint AGN component in deep radio fields, will provide an important tool to understand the role of nuclear activity in distant galaxies and its possible co-evolution with star-formation processes, as radio wavelengths are not affected by dust extinction and/or gas absorption. <P />In my talk I will report about the e-MERLIN Galaxy Evolution Survey (eMERGE, PI: Muxlow), a legacy project which aims at undertaking a spatially-resolved study of AGN and star formation processes up to high redshift in a 30 arcmin diameter field in the GOODS-N region, through ultra-deep (sub-microJy rms), sub-arcsec (50-500 mas) imaging at 1.4 and 5 GHz, using combined JVLA and eMERLIN observations. I will focus on the 5 GHz JVLA mosaic observations and catalogue of GOODS-N (94 sources), in the framework of the eMERGE project, and on the study of a larger sample of GOODS-N galaxies (300 objects) selected at 1.4 GHz to constrain the presence of AGN cores in moderate-to-high redshift (1<z<5) galaxies, via radio spectra-morphological analysis with the additional help of multi-wavelength information. | Titolo del convegno: | Active Galactic Nuclei: what’s in a name?’ | Luogo del convegno: | Garching b. Munchen, Germany | Periodo del convegno: | 27 June - 1 July, 2016 | URI: | http://hdl.handle.net/20.500.12386/25148 | URL: | https://zenodo.org/record/60452 http://www.eso.org/sci/meetings/2016/AGN2016.html https://zenodo.org/communities/agn2016/?page=1&size=20 |
DOI: | 10.5281/zenodo.60452 | Bibcode ADS: | 2016agnw.confE..38G | Fulltext: | open |
È visualizzato nelle collezioni: | 4.09 Prodotti multimediali |
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