The most massive protoclusters at z=4.3-5.8 selected by the South Pole Telescope

0 Assigned ID: 693 ----- Attempting Submission 1 (Thu Jan 31 00:50:31 GMT 2019) ----- HST Phase I Proposal 693 (HST_sptpc.apt) successfully submitted. Receipt: # 693-1 ----- Attempting Submission 2 (Thu Jan 31 01:16:06 GMT 2019) ----- HST Phase I Proposal 693 (HST_sptpc.apt) successfully submitted. Receipt: # 693-2 0 ----- Attempting Submission 1 (Thu Mar 28 05:37:11 GMT 2019) ----- The most massive protoclusters at z=4.3-5.8 selected by the South Pole Telescope We request deep near-infrared imaging of two SPT-selected protoclusters, SPT2349-56 (z=4.3) and SPT0348-62 (z=5.8). They possess some of the largest halo masses ever observed directly at z>4. Selected via millimeter-wavelength dust emission in the 2500 square degree South Pole Telescope (SPT) survey, they have as many as 31 gas-rich galaxies resolved by ALMA, all lying in a compact protocluster. We have obtained sensitive observations of carbon monoxide and ionized carbon with ALMA, thereby allowing us to assess the obscured star formation and gas masses of cluster members. The goal of this proposal is to obtain F160W and F110W HST imaging with a total of 3 (2) orbits per cluster to measure the stellar content, galaxy morphology, and assess the spatial extent of these structures. The proposed HST observations will provide the imaging and photometric information required for a complete picture of the obscured and unobscured stellar components of these galaxies, revealing the complicated structure in the gas-rich galaxies that host rapid star formation. The combination of our unique high resolution ALMA datasets with the proposed HST observations will allow a full characterization of the stars, gas, and dust in these cosmologically important protoclusters of primordial starburst galaxies, which mark the epoch of stellar mass assembly in the Universe. From an outreach perspective, the high spatial resolution of the HST identifications of protocluster galaxies will complement the ALMA data in publicizing these high impact results. We will image each of our targets (SPT2349-56 and SPT0348-62) with the F160W and F110W filters. The HST field of view is well suited to completely sample the 1.5 arcmin diameter regions of the proto-cluster cores, so mosaicing will not be required. Our target depths are informed by our Gemini K-band and Spitzer-IRAC imaging, as well as a handful similar sources analogues with HST imaging. The typical half-light radii for SMGs from previous studies is about 2.8kpc, corresponding to 0.4 arcsec at z = 5. This suggests typical expected average surface brightnesses of H = 23 mag/arcsec^2 and J = 23.3 mag/arcsec^2 within the within the half-light radius, ranging to H < 24.4 mag/arcsec^2 and J < 24.7 mag/arcsec^2 for the faintest sources. To reach these surface brightness limits with a S/N=5 per 0.15 arcsec resolution element requires an exposure time of 7800 seconds in the F160W band and 5200 sec in te F110W band, which is obtainable in three and two orbits, respectively. This will be sucient to morphologically resolve all sources under a range of assumptions. Cosmology Galaxies and the IGM 3 false false false false false false false SUPPORTED CLUSTER OF GALAXIES NUCLEUS YES Observations will use F110W and F160W band filters, the V-magnitude quoted is an unreliable estimate. J2000 J2000 ~23 mag/arcsec^2 in H and J bands CLUSTER OF GALAXIES NUCLEUS YES Observations will use F110W and F160W band filters, the V-magnitude quoted is an unreliable estimate. J2000 J2000 ~23 mag/arcsec^2 in H and J bands WFC3/IR Imaging No No F160W WFC3/IR Imaging No No F160W WFC3/IR Imaging No No F110W WFC3/IR Imaging No No F110W POS-TARG DITHER 0.636 LINE false false 2 41.788 WFC3-IR-DITHER-LINE 1

false

1553751313349 The scheduling data was generated by CASM 27.0. CASM was run in Phase II mode. 5200s in F110W filter targeting SPT2349. 1559998425000 248.0300862147089 (Tic-Visit :proposal-id 15701 :visit-id "01" :proposal-version -1 :trans-version "20181130" :date "27-Mar-2019 22:35:12.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 2 :saa-model "30" :si-bright-earth-limb-angle 20.0 :data-volume 4456688 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 15701 :visit-id "01" :obset-id "01" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 15701 :visit-id "01" :orbit-number 1 :pcs-time 333 :si-vis-utilization 3013 :al-overhead-at-end 0 :internal-dur-at-end 0 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3389 :pcs-gap 0 ) (Tic-Orbit :proposal-id 15701 :visit-id "01" :orbit-number 2 :pcs-time 302 :si-vis-utilization 3013 :al-overhead-at-end 0 :internal-dur-at-end 690 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3389 :pcs-gap 0 ) true 2 0 5200s on-source in F110W filter targeting SPT2349. 1562607880437 /private/var/folders/0b/qbp4bysx6vdbfxvp_xw3dyxw00023y/T/OPVisit8612662999265015596.xml The scheduling data was generated by CASM 27.0. CASM was run in Phase II mode. 5200s in F110W filter targeting SPT0348. 1559623465000 193.3780473026527 (Tic-Visit :proposal-id 15701 :visit-id "02" :proposal-version -1 :trans-version "20190514" :date "08-Jul-2019 13:44:39.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 2 :saa-model "30" :si-bright-earth-limb-angle 20.0 :data-volume 4456688 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 15701 :visit-id "02" :obset-id "02" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 15701 :visit-id "02" :orbit-number 1 :pcs-time 333 :si-vis-utilization 3013 :al-overhead-at-end 0 :internal-dur-at-end 0 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3411 :pcs-gap 0 ) (Tic-Orbit :proposal-id 15701 :visit-id "02" :orbit-number 2 :pcs-time 302 :si-vis-utilization 3013 :al-overhead-at-end 0 :internal-dur-at-end 690 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3411 :pcs-gap 0 ) true 2 0 5200s on-source in F110W filter targeting SPT0348. 1562607880437 /private/var/folders/0b/qbp4bysx6vdbfxvp_xw3dyxw00023y/T/OPVisit8612662999265015596.xml 5200s in F110W filter targeting SPT0348. (Tic-Visit :proposal-id 15701 :visit-id "02" :proposal-version -1 :trans-version "20190514" :date "08-Jul-2019 13:44:39.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 2 :saa-model "30" :si-bright-earth-limb-angle 20.0 :data-volume 4456688 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 15701 :visit-id "02" :obset-id "02" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 15701 :visit-id "02" :orbit-number 1 :pcs-time 333 :si-vis-utilization 3013 :al-overhead-at-end 0 :internal-dur-at-end 0 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3411 :pcs-gap 0 ) (Tic-Orbit :proposal-id 15701 :visit-id "02" :orbit-number 2 :pcs-time 302 :si-vis-utilization 3013 :al-overhead-at-end 0 :internal-dur-at-end 690 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3411 :pcs-gap 0 ) false 2 0 5200s on-source in F110W filter targeting SPT0348. 1562607940401 /private/var/folders/0b/qbp4bysx6vdbfxvp_xw3dyxw00023y/T/OPVisit14283879985402103653.xml 7800s in F110W filter targeting SPT0348. (Tic-Visit :proposal-id 15701 :visit-id "04" :proposal-version -1 :trans-version "20190514" :date "08-Jul-2019 13:45:39.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 3 :saa-model "30" :si-bright-earth-limb-angle 20.0 :data-volume 6685040 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 15701 :visit-id "04" :obset-id "04" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 15701 :visit-id "04" :orbit-number 1 :pcs-time 333 :si-vis-utilization 3013 :al-overhead-at-end 0 :internal-dur-at-end 0 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3411 :pcs-gap 0 ) (Tic-Orbit :proposal-id 15701 :visit-id "04" :orbit-number 2 :pcs-time 302 :si-vis-utilization 3054 :al-overhead-at-end 0 :internal-dur-at-end 0 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3411 :pcs-gap 0 ) (Tic-Orbit :proposal-id 15701 :visit-id "04" :orbit-number 3 :pcs-time 302 :si-vis-utilization 3013 :al-overhead-at-end 0 :internal-dur-at-end 690 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3411 :pcs-gap 0 ) true 3 0 7800s on-source in F110W filter targeting SPT0348. 1553751357253 The scheduling data was generated by CASM 27.0. CASM was run in Phase II mode. 7800s in F110W filter targeting SPT2349. 1560634711000 253.74776935750293 (Tic-Visit :proposal-id 15701 :visit-id "03" :proposal-version -1 :trans-version "20181130" :date "27-Mar-2019 22:35:56.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 3 :saa-model "30" :si-bright-earth-limb-angle 20.0 :data-volume 6685040 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 15701 :visit-id "03" :obset-id "03" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 15701 :visit-id "03" :orbit-number 1 :pcs-time 333 :si-vis-utilization 3013 :al-overhead-at-end 0 :internal-dur-at-end 0 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3389 :pcs-gap 0 ) (Tic-Orbit :proposal-id 15701 :visit-id "03" :orbit-number 2 :pcs-time 302 :si-vis-utilization 3054 :al-overhead-at-end 0 :internal-dur-at-end 0 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3389 :pcs-gap 0 ) (Tic-Orbit :proposal-id 15701 :visit-id "03" :orbit-number 3 :pcs-time 302 :si-vis-utilization 3013 :al-overhead-at-end 0 :internal-dur-at-end 690 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3389 :pcs-gap 0 ) true 3 0 7800s on-source in F110W filter targeting SPT2349. 1562607940401 /private/var/folders/0b/qbp4bysx6vdbfxvp_xw3dyxw00023y/T/OPVisit14283879985402103653.xml The scheduling data was generated by CASM 27.0. CASM was run in Phase II mode. 7800s in F110W filter targeting SPT0348. 1559795037000 195.2290551258634 (Tic-Visit :proposal-id 15701 :visit-id "04" :proposal-version -1 :trans-version "20190514" :date "08-Jul-2019 13:45:39.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 3 :saa-model "30" :si-bright-earth-limb-angle 20.0 :data-volume 6685040 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 15701 :visit-id "04" :obset-id "04" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 15701 :visit-id "04" :orbit-number 1 :pcs-time 333 :si-vis-utilization 3013 :al-overhead-at-end 0 :internal-dur-at-end 0 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3411 :pcs-gap 0 ) (Tic-Orbit :proposal-id 15701 :visit-id "04" :orbit-number 2 :pcs-time 302 :si-vis-utilization 3054 :al-overhead-at-end 0 :internal-dur-at-end 0 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3411 :pcs-gap 0 ) (Tic-Orbit :proposal-id 15701 :visit-id "04" :orbit-number 3 :pcs-time 302 :si-vis-utilization 3013 :al-overhead-at-end 0 :internal-dur-at-end 690 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3411 :pcs-gap 0 ) true 3 0 7800s on-source in F110W filter targeting SPT0348.