This target is not used in this proposal.
This target is not used in this proposal.
This target is not used in this proposal.
This target is not used in this proposal.
0
offset acs pointings and reduced iterations on f125w and f160w pointings.
840112696
----- Attempting Submission 1 (Thu Jul 02 19:36:57 GMT 2020) -----
HST Phase II Proposal 16237 successfully submitted.
Receipt: # 16237-1
----- Attempting Submission 2 (Thu Jul 09 18:18:26 GMT 2020) -----
HST Phase II Proposal 16237 successfully submitted.
Receipt: # 16237-2
----- Attempting Submission 3 (Tue Jul 14 04:14:58 GMT 2020) -----
----- Attempting Submission 4 (Fri Jul 17 21:53:30 GMT 2020) -----
HST Phase II Proposal 16237 successfully submitted.
Receipt: # 16237-4
----- Attempting Submission 5 (Mon Aug 03 05:49:20 GMT 2020) -----
HST Phase II Proposal 16237 successfully submitted.
Receipt: # 16237-5
----- Attempting Submission 6 (Sat Dec 05 06:29:15 GMT 2020) -----
A massive protocluster at z=7 selected by the South Pole Telescope
We request deep near-infrared imaging of an SPT-selected protocluster, SPT0311-62 located at z=6.9. It possesses a very large ~10^13 Msun halo mass for any structure at z>4, immense at z~7. Selected via millimeter-wavelength dust emission in the 2500 square degree South Pole Telescope (SPT) survey, it has been resolved by ALMA into 11 gas-rich galaxies, the 6 brightest /most massive confirmed spectrally to lie in an extended protocluster. Sensitive observations of carbon monoxide and ionized carbon with ALMA, allow assessment of the obscured star formation and gas masses of bright cluster members. The goal of this proposal is to obtain F160W, F125W, F814W HST imaging (3 tiled pointings in WFC3, 1 pointing ACS) to measure the stellar properties, galaxy morphologies, 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 the ALMA galaxies, and the expected overdensity of LBGs, revealing the complicated structure in the gas-rich galaxies that host rapid star formation and the less luminous galaxies which trace the filaments of an early collapsing structure. The combination of high resolution ALMA datasets with the proposed HST observations will allow a full characterization of the stars, gas, and dust in this cosmologically important protocluster of primordial starburst galaxies, well into the epoch of reionization 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.
ACS and WFC3
Members of the team are expert in multi-wavelength studies of distant galaxies, and especially submm-selected sources, and simulations of such galaxies and structures in the early universe.
Galaxies
6
false
false
false
false
false
false
false
SUPPORTED
CLUSTER OF GALAXIES
NUCLEUS
YES
J2000
J2000
ACS/WFC
Imaging
No
No
F814W
WFC3/IR
Imaging
No
No
F160W
WFC3/IR
Imaging
No
No
F125W
WFC3/IR
Imaging
No
No
F160W
WFC3/IR
Imaging
No
No
F160W
WFC3/IR
Imaging
No
No
F125W
WFC3/IR
Imaging
No
No
F125W
WFC3/IR
Imaging
No
No
F160W
WFC3/IR
Imaging
No
No
F125W
ACS/WFC
Imaging
No
No
F814W
POS-TARG
DITHER
0.262
LINE
0.192
false
false
68.14
4
18.39
ACS-WFC-DITHER-BOX
1
false
POS-TARG
DITHER
0.572
LINE
0.365
false
false
74.653
4
18.528
WFC3-IR-DITHER-BOX-MIN
2
false
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:si-bright-earth-limb-angle 20.0
:data-volume 4178160
:tdrss-contact-duration 0
:coron NIL
)
(Tic-Obset
:proposal-id 16237
:visit-id "12"
:obset-id "12"
:pcs-mode "FGS"
)
(Tic-Orbit
:proposal-id 16237
:visit-id "12"
:orbit-number 1
:pcs-time 383
:si-vis-utilization 2936
: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 16237
:visit-id "12"
:orbit-number 2
:pcs-time 392
:si-vis-utilization 2936
:al-overhead-at-end 0
:internal-dur-at-end 652
:dark-offset NIL
:dark-utilization 0
:max-dark-utilization 1920
:low-sky "N"
:pcs-visibility 3389
:pcs-gap 0
)
true
2
0
5000s on-source in F160W filter targeting SPT0311
5000s on-source in F160W filter targeting SPT0311