Studying galaxy evolution through cosmic time via the {mu}Jy radio population: early results from eMERGE. (arXiv:1902.02356v1 [astro-ph.GA])

Studying galaxy evolution through cosmic time via the {mu}Jy radio population: early results from eMERGE. (arXiv:1902.02356v1 [astro-ph.GA])
<a href="http://arxiv.org/find/astro-ph/1/au:+Thomson_A/0/1/0/all/0/1">A.P. Thomson</a> (JBCA), <a href="http://arxiv.org/find/astro-ph/1/au:+Muxlow_T/0/1/0/all/0/1">T.W.B. Muxlow</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Smail_I/0/1/0/all/0/1">Ian Smail</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+McHardy_I/0/1/0/all/0/1">I.M McHardy</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Beswick_R/0/1/0/all/0/1">R.J. Beswick</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Radcliffe_J/0/1/0/all/0/1">J.F. Radcliffe</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Wrigley_N/0/1/0/all/0/1">N.Wrigley</a> (on behalf of the eMERGE consortium)

The $e$MERLIN Galaxy Evolution Survey ($e$MERGE) is an ambitious,
multi-tiered extragalactic radio continuum survey being carried out with
$e$MERLIN and the VLA at 1.4GHz and 6GHz. Exploiting the unique combination of
high sensitivity and high angular resolution provided by radio interferometry,
these observations will provide a powerful, obscuration-independent tool for
tracing intense star-formation and AGN activity in galaxies out to $zsim5$. In
our first data release (DR1) we present $e$MERGE Tier 1, a 15-arcmin pointing
centred on the GOODS-N field, imaged at 1.4GHz with the VLA and $e$MERLIN at
$sim 0.28”$ resolution down to an rms sensitivity of $sim 1.2,mu$Jy
beam$^{-1}$. This unique radio survey — unrivaled at 1.4GHz in its combination
of depth, areal coverage and angular resolution in the pre-SKA era — allows us
to localise and separate extended star-forming regions, nuclear starbursts and
compact AGN core/jet systems in galaxies over the past two-thirds of cosmic
history, a crucial step in tracing the apparently simultaneous growths of the
stellar populations and central black holes in massive galaxies. In these
proceedings we highlight some early science results from $e$MERGE DR1,
including some examples of the sub-arcsecond morphologies and cold dust
properties of 1.4GHz-selected galaxies. $e$MERGE Tier 1 will eventually reach
sub-$mu$Jy beam$^{-1}$ sensitivity at $0.28”$ resolution over a 30-arcmin
field, providing crucial benchmarks for deep extragalactic surveys which will
be undertaken with SKA in the next decade.

The $e$MERLIN Galaxy Evolution Survey ($e$MERGE) is an ambitious,
multi-tiered extragalactic radio continuum survey being carried out with
$e$MERLIN and the VLA at 1.4GHz and 6GHz. Exploiting the unique combination of
high sensitivity and high angular resolution provided by radio interferometry,
these observations will provide a powerful, obscuration-independent tool for
tracing intense star-formation and AGN activity in galaxies out to $zsim5$. In
our first data release (DR1) we present $e$MERGE Tier 1, a 15-arcmin pointing
centred on the GOODS-N field, imaged at 1.4GHz with the VLA and $e$MERLIN at
$sim 0.28”$ resolution down to an rms sensitivity of $sim 1.2,mu$Jy
beam$^{-1}$. This unique radio survey — unrivaled at 1.4GHz in its combination
of depth, areal coverage and angular resolution in the pre-SKA era — allows us
to localise and separate extended star-forming regions, nuclear starbursts and
compact AGN core/jet systems in galaxies over the past two-thirds of cosmic
history, a crucial step in tracing the apparently simultaneous growths of the
stellar populations and central black holes in massive galaxies. In these
proceedings we highlight some early science results from $e$MERGE DR1,
including some examples of the sub-arcsecond morphologies and cold dust
properties of 1.4GHz-selected galaxies. $e$MERGE Tier 1 will eventually reach
sub-$mu$Jy beam$^{-1}$ sensitivity at $0.28”$ resolution over a 30-arcmin
field, providing crucial benchmarks for deep extragalactic surveys which will
be undertaken with SKA in the next decade.

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