0
Assigned ID: 1074
----- Attempting Submission 1 (Fri Apr 07 23:04:21 GMT 2017) -----
HST Phase I Proposal 1074 (qsos_alma.apt) failed submission.
----- Attempting Submission 2 (Fri Apr 07 23:04:44 GMT 2017) -----
HST Phase I Proposal 1074 (qsos_alma.apt) failed submission.
----- Attempting Submission 3 (Fri Apr 07 23:05:06 GMT 2017) -----
HST Phase I Proposal 1074 (qsos_alma.apt) failed submission.
----- Attempting Submission 4 (Fri Apr 07 23:05:40 GMT 2017) -----
HST Phase I Proposal 1074 (qsos_alma.apt) failed submission.
----- Attempting Submission 5 (Fri Apr 07 23:06:19 GMT 2017) -----
HST Phase I Proposal 1074 (qsos_alma.apt) failed submission.
----- Attempting Submission 6 (Fri Apr 07 23:06:48 GMT 2017) -----
HST Phase I Proposal 1074 (qsos_alma.apt) failed submission.
----- Attempting Submission 7 (Fri Apr 07 23:07:30 GMT 2017) -----
HST Phase I Proposal 1074 (qsos_alma.apt) failed submission.
----- Attempting Submission 8 (Fri Apr 07 23:09:41 GMT 2017) -----
----- Attempting Submission 9 (Fri Apr 07 23:10:23 GMT 2017) -----
HST Phase I Proposal 1074 (qsos_alma.apt) failed submission.
----- Attempting Submission 10 (Fri Apr 07 23:13:01 GMT 2017) -----
----- Attempting Submission 11 (Fri Apr 07 23:14:51 GMT 2017) -----
HST Phase I Proposal 1074 (qsos_alma.apt) failed submission.
----- Attempting Submission 12 (Fri Apr 07 23:16:06 GMT 2017) -----
HST Phase I Proposal 1074 (qsos_alma.apt) failed submission.
----- Attempting Submission 13 (Fri Apr 07 23:16:24 GMT 2017) -----
HST Phase I Proposal 1074 (qsos_alma.apt) failed submission.
----- Attempting Submission 14 (Fri Apr 07 23:17:54 GMT 2017) -----
HST Phase I Proposal 1074 (qsos_alma.apt) failed submission.
----- Attempting Submission 15 (Fri Apr 07 23:18:45 GMT 2017) -----
HST Phase I Proposal 1074 (qsos_alma.apt) failed submission.
----- Attempting Submission 16 (Fri Apr 07 23:18:59 GMT 2017) -----
HST Phase I Proposal 1074 (qsos_alma.apt) successfully submitted.
Receipt: # 1074-16
----- Attempting Submission 17 (Fri Apr 07 23:25:54 GMT 2017) -----
HST Phase I Proposal 1074 (qsos_alma.apt) successfully submitted.
Receipt: # 1074-17
----- Attempting Submission 18 (Fri Apr 07 23:49:08 GMT 2017) -----
0
The environments of 6<z<7 quasars: rich with starbursts?
We propose 13 orbits of ACS and WFC3 imaging to characterize the environments of 6<z<7 quasars. These quasars are suggested to live in particularly overdense environments, given an observed excess of serendipitous millimeter continuum detections in their vicinities from ALMA. At z>6, 1.1mm probes the peak of dust emission and is a good proxy for total obscured SFR; the serendipitous ALMA detections we find are consistent with SFRs 30-150Msun/yr, and they are likely to sit at the same redshift of the quasar because they greatly exceed the expected number of detections for blank-field millimeter work. We will use HST imaging to investigate whether or not these are genuine overdense environments by identifying candidate star-forming galaxies via their Ly-alpha break and rest-frame UV continuum. The ALMA data enables us to place unique constraints on the assembly history of early Universe protoclusters, given the short duty-cycle of dusty galaxies detected directly in the millimeter. This will allow us to directly characterize the luminosity functions in overdense environments at z>6, characterizing the ubiquity of starbursts around quasars, and test the predictions of theory, which assert that half of all cosmic star-formation at z>6 takes place in overdense environments that will eventually collapse into >10^{14}Msun galaxy clusters at z=0.
We request multi-band ACS/WFC3 imaging for three quasars at 6.0<z<6.9. At these redshifts, the Ly-alpha break falls between 8500AA and 9500AA and so imaging in five filters can easily bracket the break and make clear identifications of high-z candidate dropout sources.
For quasars J2348-3054 and J0305-3150 we will observe with the following instruments/filters for:
WFC3/F160W (1 orbit per quasar)
WFC3/F125W (1 orbit per quasar)
WFC3/F105W (1 orbit per quasar)
ACS/F814W (1 orbit per quasar)
ACS/F606W (1 orbit per quasar)
The parallels for these targets will be taken in ACS/F606W, ACS/F814W, ACS/F850LP, WFC3/F110W and WFC3/F140W.
For quasar J2054-0005, which has been observed in Cycle 20 with F125W and F160W with WFC3, we will observe:
WFC3/F105W (1 orbit)
ACS/F814W (1 orbit)
ACS/F606W (1 orbit).
The parallels for this target will be ACS/F814W, WFC3/F110W and WFC3/F140W.
Our parallel observations are need to identify possible additional dropout galaxies a few arcminutes away from the quasar; this tests the physical scale of protoclusters at this epoch. To maximize the value of our coordinated parallels, we propose to fix the orientation of ACS and WFC3 so that the parallel fields are all aligned. We cannot complete the parallel observations with the exact same filter set, given the fact that two primary observations are ACS and three are WFC3, so our parallels must consist of three ACS filters and two WFC3. For this redshift range, this is why our selected parallel filter set is F606W, F814W, F850LP, F110W, and F140W.
We adopt a strategy of 13 different visits of one orbit each. We have special requirements that all of the WFC3 imaging for a given quasar are taken togther (same orientation as the first visit), and we have placed the visits for ACS as primary on-hold, requiring that they have the *opposite* orientation to the WFC3 imaging (i.e. taken 6 months later). In the case of J2054-0005, we have two ACS orbits and one WFC3 orbit, so we have requested ACS go first and we have placed the WFC3 orbit on hold. Obviously the order of which orbits are on-hold and which are executed first can be reversed if for any reason that is better for the observatory scheduling.
Galaxies and the IGM
6
false
false
false
false
false
false
false
SUPPORTED
GALAXY
HIGH REDSHIFT GALAXY
QSO
QUASAR
ULTRALUMINOUS IR GAL
NO
J0305
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J2000
GALAXY
HIGH REDSHIFT GALAXY
QSO
QUASAR
ULTRALUMINOUS IR GAL
J2348
J2000
J2000
GALAXY
HIGH REDSHIFT GALAXY
QSO
QUASAR
ULTRALUMINOUS IR GAL
J2054
J2000
J2000
ACS/WFC
Imaging
No
No
F814W
WFC3/IR
Imaging
No
No
F110W
ACS/WFC
Imaging
No
No
F606W
WFC3/IR
Imaging
No
No
F140W
WFC3/IR
Imaging
No
No
F105W
ACS/WFC
Imaging
No
No
F606W
WFC3/IR
Imaging
No
No
F125W
ACS/WFC
Imaging
No
No
F814W
WFC3/IR
Imaging
No
No
F160W
ACS/WFC
Imaging
No
No
F850LP
ACS/WFC
Imaging
No
No
F606W
WFC3/IR
Imaging
No
No
F110W
ACS/WFC
Imaging
No
No
F814W
WFC3/IR
Imaging
No
No
F140W
WFC3/IR
Imaging
No
No
F105W
ACS/WFC
Imaging
No
No
F606W
WFC3/IR
Imaging
No
No
F125W
ACS/WFC
Imaging
No
No
F814W
WFC3/IR
Imaging
No
No
F160W
ACS/WFC
Imaging
No
No
F850LP
ACS/WFC
Imaging
No
No
F606W
WFC3/IR
Imaging
No
No
F110W
ACS/WFC
Imaging
No
No
F814W
WFC3/IR
Imaging
No
No
F140W
WFC3/IR
Imaging
No
No
F105W
ACS/WFC
Imaging
No
No
F814W
POS-TARG
DITHER
0.572
LINE
0.365
false
false
74.653
4
18.528
WFC3-IR-DITHER-BOX-MIN
1
false
POS-TARG
DITHER
0.262
LINE
0.192
false
false
68.14
4
18.39
ACS-WFC-DITHER-BOX
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