Cosmology Legacy Survey Jim Dunlop University of Edinburgh

Cosmology Legacy Survey Jim Dunlop University of Edinburgh + Ian Smail (Durham), Mark Halpern (UBC), Paul van der Werf (Leiden)

Cosmology Legacy Survey Why are extra-galactic sub-mm surveys interesting? • Most star-formation activity at high z appears dust-enshrouded • Key and challenging test for current galaxy-formation models • Crucial for understanding link between star and black-hole formation

Hughes et al. 1998

Baugh et al. 2005

Cosmology Legacy Survey SCUBA-2 is a new CCD-style imager for the JCMT 50 sq arcmin FOV ~ 10 x SCUBA FOV Fully sampled imaging New TES detectors

Cosmology Legacy Survey SCUBA survey heritage HDF 8 m. Jy SHADES

Cosmology Legacy Survey SCUBA 2 Survey Strategy In the sub-mm, the standard survey “wedding cake” has been a bit squashed due to: • Large (15 arcsec) beam size of the JCMT at 850 microns • High background • Effect of negative k-corrections • Limited sensitivity and FOV of SCUBA 2 (on the JCMT) only changes the last of these

Cosmology Legacy Survey SCUBA 2 Survey Strategy

Wide 850 survey – “Super SHADES” 20 sq degrees, s 850 = 0. 7 m. Jy ~10, 000 sources with S/N > 10 • ~Schmidt plate in area, to the depth of the SCUBA HDF image • Accurate measurements of clustering and redshift distribution – placing luminous starbursts within LCDM • Observing proto Coma clusters • The bright source counts – extreme objects • Bulge and black-hole formation • Intermediate and low-redshift sources • The SZ effect

Deep 450 micron survey 0. 6 sq degree, s 450 = 0. 5 m. Jy, ~10000 sources • Bolometric output of the 850 micron population • Determining the source populations dominating the 450 micron background • Exploiting high-resolution to beat down the confusion limit • Exploiting high resolution to better identify the 850 micron sources + connect with Herschel and Spitzer data etc • Resolving sub-mm sources – starbursts versus AGN etc

Cosmology Legacy Survey SCUBA 2 Survey Strategy 2 -year plan – fields dictated by multi-freq follow-up and accessibility 20 sq degree 850 micron survey to rms = 0. 7 m. Jy XMM-LSS (5 sq deg), Lockman Hole (4 sq deg), CDFS (3 sq deg), ELAIS N 1 (2 sq deg), COSMOS (2 sq deg), BOOTES (2 sq. deg), EGS (1 sq deg), AKARI NEP (1 sq deg) 0. 6 -0. 9 sq degree 450 micron survey to rms = 0. 5 m. Jy GOODS-N (0. 05 sq deg), GOODS-S (0. 05 -0. 25 sq deg), UDS (0. 25 sq deg), COSMOS (0. 25 sq deg), SA 22 (0. 02 sq deg), AKARI NEP (0. 02 sq deg) 0. 6 -0. 9 sq degree 850 micron survey to rms = 0. 15 m. Jy GOODS-N (0. 05 sq deg), GOODS-S (0. 05 -0. 25 sq deg), UDS (0. 25 sq deg) COSMOS (0. 25 sq deg), SA 22 (0. 02 sq deg), AKARI NEP (0. 02 sq deg)

Cosmology Legacy Survey 1. Sub-mm galaxies and Structure Formation - discriminating galaxy formation models via clustering

Cosmology Legacy Survey 1. Sub-mm galaxies and Structure Formation - placing sub-mm galaxies in the Lambda-CDM framework

Cosmology Legacy Survey 1. Sub-mm galaxies and Structure Formation - the progenitors of extreme structures

Cosmology Legacy Survey 2. Sub-mm galaxies and Cosmic Star Formation History • Bright sources – extreme starbursts? • Resolving the 450 background • Bolometric luminosities – SCUBA 2 + Herschel • Faint sources • The evolving sub-mm luminosity function • Cosmic star-formation history

Cosmology Legacy Survey 2. Sub-mm galaxies and Cosmic Star Formation History - bright sources – extreme starbursts

Cosmology Legacy Survey 2. Sub-mm galaxies and Cosmic Star Formation History - extending dynamic range in the deep 850 image 0. 1 sq deg, 850 input 0. 1 sq deg, 850 recovered with aid of deep 450

Cosmology Legacy Survey 2. Sub-mm galaxies and Cosmic Star Formation History - constructing the evolving sub-mm luminosity function

Cosmology Legacy Survey 3. Towards a detailed understanding of galaxy formation • Stellar masses and evolutionary status • Testing semi-analytic and semi-numerical models • Sub-mm source sizes • Relationship between bulge and black-hole formation • The sub-mm : Lyman break : ERO connection

Cosmology Legacy Survey 3. Towards a detailed understanding of galaxy formation - testing semi-analytical and semi-numerical models

Cosmology Legacy Survey Status Tri-national consortium of ~100 astronomers Survey approved in July 2005 490 hrs of band-1 time awarded to the 450 micron survey in semesters 07 B, 08 A, 08 B, 09 A (=90% of all band-1 time) 630 hrs of band-2/3 time awarded to the 850 micron survey in semesters 07 B, 08 A, 08 B, 09 A A further 1530 hrs awarded in semesters 09 B-12 A to extend 450 survey to 1. 3 sq. deg, and 850 survey to 50 sq deg