Institute of Astronomy

Wide-field submm surveys of the nearby and very distant Universe

SpeakerTalk DateTalk Series
Steve Eales (Cardiff)7 February 2019Institute of Astronomy Colloquia

Abstract

I will discuss results from the largest Herschel survey of the
extragalactic sky. I will
show that the discovery of a simple technique for discovering very large
numbers of
high-redshift lensed systems has great potential for
measuring cosmological parameters, testing halo mass functions and 
investigating star formation and the interstellar medium in galaxies in the
process of formation - and I will show some results from our ALMA programmes
to do some of these things. I will then show that a submm survey of the
nearby
universe reveals a very different galaxyscape than
traditional optical survey, showing for example that the 'red sequence' and
'blue cloud' are the result of selection effects and that galaxy evolution
is much
gentler process than the drastic
quenching process that is an integral part of the optical view of galaxies.
Finally, I will briefly describe two other surveys, one of the very early
Universe
that we are about to start with the Large Millimetre Telescope and one
of the Andromeda, which is the first submm survey of our nearest big
neighbour
and which is currently underway at the JCMT.

Presentation

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