Contributed Talk - Splinter CCAT

Tuesday, 19 September 2017, 14:55   (Auditorium MPS)

High-redshift galaxy surveys with CCAT-p

B. Magnelli1, F. Bertoldi1, A. Karim1
1Argelander-Institut f\" ur Astronomie, University of Bonn
Auf dem Hügel 71, 53121 Bonn, Germany

Characterising the far-infrared emission of high-redshift galaxies is essential to estimate their dust-enshrouded star-formation activity otherwise only measured using not-well-understood rest-frame UV corrections. To date, far-infrared measurements are mostly based on Herschel or ALMA observations. However, while Herschel could map large areas of the sky, this 3.5 meter telescope was significantly limited by confusion (inability to separate emission from multiple galaxies within a single resolution element), providing far-infrared measurements only for the most luminous and thus not representative high-redshift galaxies.
On the other hand, ALMA can perform ultra-deep far-infrared observations but its relatively narrow field-of-view does not provide us with the statistic needed to study the evolution over cosmic time of galaxy populations.
I will demonstrate how CCAT-p, with its wide-field-of-view and 6 meter aperture, will fill this gap, providing deeper (at z>1) and wider extragalactic surveys than those from the Herschel Space Observatory. The planned CCAT-p Galaxy Evolution (GEvo) survey will improve our understanding of the faint galaxy population that is responsible for the bulk of the cosmic far-infrared background. This wide-area survey will also allow for the detection of exotic, highly luminous galaxies.