Surveys of high-z galaxies and galaxy clusters with Herschel and SCUBA-2 Eelco van Kampen University of Innsbruck, Austria

Dust emission: far-IR & sub-mm IRACMIPS Figure compiled by Mari Polletta r Stars Dust PACS SPIRE Dusty star-forming galaxies emit much of their light at IR to mm wavelengths SCUBA-2

SHADES: SCUBA half-degree survey 2 fields – Lockman Hole & 850 micron 120 sources with unbiased (deboosted) flux densities

Estimating the angular correlation function w(  ) Lockman HoleSXDF w(θ) from the Landy & Szalay (1993) estimator: Kent reduction noise maps

Random catalogues from the noise maps Procedure: 1.generate a uniformly distributed point source distribution 2.assign a flux according to number counts of Coppin et al. (2006) 3.add random (Gaussian) noise using the noise map 4.keep sources in the random catalogue with S > 2.5σ map S > 5 mJy

Random cat. + SHADES cat.  w(θ) Lockman S > 6 mJy S > 5 mJy Kent reduction data only

Fitting to  non-linear  2 -fitting using the Levenberg-Marquardt method  the fitting includes the integral constraint taken from a look-up table  fitting functions are the angular correlation function w(  ) = (  /A)  and the sky-averaged correlation function:  the sky-averaging produces correlated errors, which is taken into account by using the full covariance matrix to construct an alternative  2 -statistic

SHADES clustering measurement Large dots and solid line (fit) for the angular correlation function w(θ)=(θ/A)  Stars and dashed line (fit) for the sky-averaged angular correlation Ω (θ) Lockman: A = 11.0" +/- 8.7" SXDF: A = 27.4" +/- 14.7”  = /  = / (both estimates from the sky-averaged angular correlation functions) Lockman >6mJy SXDF >6mJy

Model-data comparison for SHADES Fit to slope and amplitude for 25 mocks for four different galaxy formation models van Kampen et al. (2005)

Model-data comparison for SHADES Lockman Hole SXDF

SCUBA-2 Imaging of the sky at 450 and 850  m simultaneously SCUBA-2 will bring “CCD-style” imaging to the JCMT for the first time A large (>50 arcmin 2 ) field-of-view Sensitivity governed by the sky background SCUBA-2 is a new generation imager for the JCMT Novel scanning mode to realise large-area surveys Provide fully-sampled images of the sky in ~ 4 seconds

SCUBA-2 Cosmology Legacy Survey 2 years 5 years SHADES

Survey fields 850  m survey: 450  m survey: fieldRAarea [deg 2 ] XMM-LSS25 ECDFS33 Cosmos102 Lockman104 Bootes142 EGS141 ELAIS-N1162 Akari-NEP181 fieldRAarea [deg 2 ] UDS2<0.25 ECDFS3<0.25 Cosmos10<0.25 GOODS-N Akari-NEP SA Field selection (partly) driven by complementary data of the required depth; e.g., K AB =25

H1K: proposed Herschel 1000 sq. degree survey H1K fields (white blocks) superimposed on the IRAS 100 micron maps In the north the outlines of the other surveys are: 2dFGRS - continuous blue; VIKING/KIDS - cyan; GAMA - magenta ; SDSS - yellow. The red circle shows the area covered by the Coma cluster. In the south the surveys are: 2dFGRS - continuous blue; VIKING/KIDS - cyan; Dark Energy Survey - magenta; South Pole Telescope - dashed blue.

A blank field (850 JCMT)

Add a (proto-)cluster at z=2.5

Another blank field (850 JCMT)

Add a proto-cluster at z=3.8

Galaxy evolution in and around clusters Subaru SuprimeCam VRz image with galaxy surface density contours in red and the area of the ACS field outlined in green. The ACS field traces the filamentary structure evident from the density contours (Rich & Ebeling 2007) The z=0.5 galaxy cluster J0717.9

Panoramic imaging in and around clusters Subaru BVRI imaging of A851 and its infall region by Kodama et al Red dots are at the cluster redshift according to their photometric redshifts.

Exploit unique capabilities of Herschel Figure compiled by Mari Polletta

Herschel Open-Time Key-Programme proposal to study the cluster infall region  use well-defined rich cluster sample at z≈0.5  map the infall region around these clusters out to around 5 Mpc (depending on cluster mass)  measure SFR and L IR for each galaxy  measure stellar masses from near-IR (follow-up or existing)  remove interlopers (foreground/background)  define environment

A survey of panoramic surveys Target fields for the Herschel proposal “Studying galaxy evolution where it happens”

Summary Only far-IR and sub-mm observations allow us to survey dusty star-formation at high redshifts and in over-dense regions. The future is blobby !