Type-1 and Type-2 AGN have strong mid-
infrared emission that identifies them as
probable AGN. This system was not identi-
fied as multiple in the standard photometry
products from the VIDEO or SERVS surveys,
raising the possibility that many more such
systems may exist unrecognized in current
surveys.
In the future, we believe that observations
of extragalactic fields with MCAO will fulfill
a valuable role supplementing deeper, but
more resource intensive, observations with
space-based platforms such as the James
Webb Space Telescope (JWST) (Kalirai, 2018).
For example, surveys of high-redshift ULIRGs
with ground-based MCAO could be used to
pick interesting individual targets for JWST.
References:
Jarvis, M. J., Bonfield, D. G., Bruce, V. A., et al.,
Monthly Notices of the Royal Astronomical Soci-
ety, 428: 1281, 2013
Kalirai, J., Contemporary Physics, 59: 251, 2018
Lacy, M., Nyland, K., Mao, M., et al., The Astro-
physical Journal, 864: 8, 2018
January 2019 / 2018 Year in Review
Lonsdale, C., Smith H. E., Rowan-Robinson,
M., et al., Publications of the Astronomical Society
of the Pacific, 115: 897, 2003
Mauduit, J.-C., Lacy, M., Farrah, D., et al., Publi-
cations of the Astronomical Society of the Pacif-
ic, 124: 1135, 2012
Rigaut, F., Neichel, B., Boccas, M., et al., Month-
ly Notices of the Royal Astronomical Soci-
ety, 437: 2361, 2014
Neichel, B., Rigaut, F., Vidal, F., et al., Month-
ly Notices of the Royal Astronomical Soci-
ety, 440: 1002, 2014
van der Wel, A., Franx, M., van Dokkum, P. G., et
al., The Astrophysical Journal, 788: 28, 2014
Mark Lacy is a Staff Scientist at the National Radio
Astronomy Observatory. He can be reached at:
[email protected]
Kristina Nyland is a Research Associate at the Na-
tional Radio Astronomy Observatory. She can be
reached at: [email protected]
Susan Ridgway is an Associate Scientist at the Na-
tional Optical Astronomy Observatory. She can be
reached at: [email protected]
GeminiFocus
Figure 3.
Left: A greyscale of the
Herschel 250 μm image
with contours of 24 μm
data from the Spitzer
SWIRE survey (Lonsdale
et al., 2003) superposed.
Right: a zoom in on the
field of a candidate triple
AGN (ES1C_55 [radio-
loud], ES1C_60 [Type-2],
and ES1C_62 [Type-1,
which has a point-like
nucleus]). All three, plus
ES1C_56 (which appears
not to be an AGN) have
photometric redshifts
close to 1.4. Contours of
8.4 GHz radio emission
from the Australia
Telescope Compact
Array are shown in
cyan, and dashed-black
contours indicate 8 μm
emission seen in SWIRE.
11