2013MNRAS.432.2798G -
Mon. Not. R. Astron. Soc., 432, 2798-2807 (2013/July-2)
e-MERLIN observations at 5GHz of the GOODS-N region: pinpointing AGN cores in high-redshift galaxies.
GUIDETTI D., BONDI M., PRANDONI I., BESWICK R.J., MUXLOW T.W.B., WRIGLEY N., SMAIL I. and McHARDY I.
Abstract (from CDS):
We present 5GHz e-Multi-Element Radio-Linked Interferometer Network (e-MERLIN) observations of the Great Observatories Origins Deep Surveys North (GOODS)-N region at sub-arcsec resolution (0.2-0.5arcsec). These data form part of the early commissioning observations for the e-MERLIN interferometer and a pilot for the e-MERLIN legacy programme e-MERLIN Galaxy Evolution Survey (eMERGE). A total of 17 sources were detected with S/N > 3. These observations provide unique information on the radio source morphology at sub-arcsec scales. For twelve of these sources, deeper 1.4GHz MERLIN+Very Large Array observations at the same spatial resolution are available, allowing radio spectral indices to be derived for 10 sources on sub-arcsec angular scales. Via analysis of the spectral indices and radio morphologies, these sources have been identified as active galactic nucleus (AGN) cores in moderate-to-high-redshift (1 < z < 4) galaxies. These results have provided AGN (or AGN-candidate) classification for six previously unclassified sources and confirmed the AGN nature of the rest of the sample. Ultimately, the eMERGE project will image the GOODS-N region at 1.4 and 5GHz with higher resolution (about 50 mas at 5GHz) and down to sub-µJy sensitivities. The unique combination of sensitivity and spatial resolution will be exploited to study star formation and AGN activity in distant galaxies.
Abstract Copyright:
© 2013 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society (2013)
Journal keyword(s):
galaxies: active - galaxies: evolution - galaxies: starburst - cosmology: observations - radio continuum: galaxies
Simbad objects:
23
Full paper
View the references in ADS
To bookmark this query, right click on this link: simbad:2013MNRAS.432.2798G and select 'bookmark this link' or equivalent in the popup menu