13384( 2) - 27-Jun-2013 10:55:59 - [ 1] HUBBLE SPACE TELESCOPE OBSERVING PROGRAM 13384 Version: 2 Check-in Time: 27-Jun-2013 10:55:59 STScI Edit Number: 0 Title A Simultaneous Measurement of the Cold Gas, Star Formation Rate, and Stellar Mass Histories of the Universe ------------------------------------------------------------------------------------ Type Cycle GO 21 ------------------------------------------------------------------------------------ Investigators Contact? PI: Dr. Dominik A. Riechers Cornell University Y CoI: Dr. Peter Capak California Institute of Technology N CoI: Dr. Chris Carilli Associated Universities, Inc. N CoI: Dr. Fabian Walter Max-Planck-Institut fur Astronomie, N Heidelberg CoI: Dr. Nicholas Z. Scoville California Institute of Technology N CoI: Dr. Vernesa Smolcic Universitaet Bonn, Inst fur Astrophysik N und Extraterrestris CoI: Dr. Emanuele Daddi Commissariat a l'Energie Atomique (CEA) N CoI: Dr. Ian R. Smail University of Durham N CoI: Prof. Rob Ivison Royal Observatory Edinburgh N CoI: Dr. Elisabete da Cunha Max-Planck-Institut fur Astronomie, N Heidelberg CoI: Dr. Mark Sargent Commissariat a l'Energie Atomique (CEA) N ------------------------------------------------------------------------------------ Abstract We have recently initiated a study that has the potential to fundamentally change our picture of galaxy evolution. Using the Jansky Very Large Array, we target a "Molecular Deep Field" to measure, for the first time, the unbiased cosmic evolution of the gas content of galaxies ("Cold Gas History of the Universe") at high redshift. We here request HST ACS and WFC3/IR observations to determine the rest-frame optical morphologies and spatially resolved star formation and stellar mass properties of the galaxies in this region to simultaneously measure the cold gas, star formation rate and stellar mass histories of the universe in a common legacy field. The high resolution and sensitivity of the HST data will allow us to directly tie the gas content, gas fractions, and star formation rates to the structural properties of galaxies. This will provide a deeper understanding of the drivers of star formation and stellar bulge/disk growth based and their connection to the gas supply and dynamics in galaxies, as well as the relative importance of mergers vs. passively evolving galaxies. The proposed inexpensive study will also enable us to study the star formation properties of the most distant spectroscopically confirmed galaxy protocluster at z=5.3. With ALMA, we have serendipitously discovered a new population of [CII]-luminous, otherwise undetected galaxies at the redshift of this protocluster. The proposed WFC3/IR data will likely be deep enough to detect the rest-frame UV emission from these enigmatic galaxies, enabling us to investigate their true nature. ------------------------------------------------------------------------------------ Observations Description ------------------------ Program uses 4 orbits, 3 with WFC3/IR in the F125W and F160W filters, and 1 with ACS/WFC and the F606W filter. 13384( 2) - 27-Jun-2013 10:55:59 - [ 2] It is broken up into two visits, one consisting of the single ACS orbit, and the other consisting of the three WFC3 IR orbits (concatenated to ensure similar rotation angles between orbits, and thus, coverage of the same galaxies in both filters - this is not an issue for ACS, given the much larger field of view relative to WFC3, it will cover the full area of interest at any orientation angle). There is no restriction on the orientation angle. All observations are of the same target field (CODEEPFIELD). 4-point position/readout dither patterns are employed, primarily to improve the PSF through subpixel sampling, i.e., to mitigate the effects of the large detector pixel sizes (especially for WFC3/IR), as well as to offset by a sufficiently large amount to move persistent pixels to different locations on the sky in each exposure, and to provide good cosmic ray rejection. For ACS/WFC, this is also important to cover the 50 pixel gap in y direction between the two detector chips. The ACS/WFC dither pattern consists of 2 positions with offset large enough to cover the inter-chip gap, and 2 subpositions each to dither on subpixel scales. The WFC3/IR dither patterns consist of 2 postions large enough to cover the "death star" feature, and 2 subpositions each to dither on subpixel scales. For the one F125W orbit, 4 positions are targeted. For the two F160W orbits, each orbit contains two subpixel dither positions, and the larger re-positioning is done between orbits. Real Time Justification ----------------------- Calibration Justification ------------------------- Additional Comments ------------------- ------------------------------------------------------------------------------------ 13384( 2) - 27-Jun-2013 10:55:59 - [ 3] TARGET LIST Fixed Targets ------------------------------------------------------------------------------------------------------------------------------------ Tar| Target | Target | Target |Coord | Radial | Flux data No | Name | Description | Position |Eqnx | Vel. | ------------------------------------------------------------------------------------------------------------------------------------ 1 CODEEPFIELD GALAXY, HIGH REDSHIFT RA=10H00M20.7000S +/- 0.1", J2000 V = 25 +/- 0.5 GALAXY, PROTOGALAXY DEC=+02D35'20.50" +/- 0.1" Reference Frame: ICRS ------------------------------------------------------------------------------------------------------------------------------------ 13384( 2) - 27-Jun-2013 10:55:59 - [ 4] Patterns ------------------------------------------------------------------------------------------------------------------------------------ Pattern_Number: 1 Primary_Pattern Secondary_Pattern Pattern_Type ACS-WFC-DITHER-LINE LINE Pattern_Purpose DITHER BACKGROUND Number_Of_Points 2 2 Point_Spacing 3.011 0.149 Line_Spacing Coordinate_Frame POS-TARG POS-TARG Pattern_Orient 85.28 34.25 Angle_Between_Sides Center_Pattern NO NO ------------------------------------------------------------------------------------------------------------------------------------ 13384( 2) - 27-Jun-2013 10:55:59 - [ 5] Visit: 01 Visit Requirements: On Hold Comments: Additional Comments: Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exp | Target | Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Num | Name | Config | Mode | or FOV |Element |Waveln.| Parameters |Exp| (Total) | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 1 CODEEPFIELD ACS/WFC ACCUM WFC F606W CR-SPLIT=NO 1 549 S PATTERN 1 1 (2196 S) ------------------------------------------------------------------------------------------------------------------------------------ Sub Exposures ------------------------------------------------------------------------------------------------------------------------------------ Target | Exp |Instr | Oper. | Aper |Spectral|Cent.|Primary |Secondary |Iteration |CR-SPLIT |Orbit |Duration Name | Num |Config | Mode | or FOV |Element |Wave.|Pattern Pos |Pattern Pos |Num |Num |Number | ------------------------------------------------------------------------------------------------------------------------------------ CODEEPFIELD 1 ACS/WFC ACCUM WFC F606W 1 1 none none 1 N/A CODEEPFIELD 1 ACS/WFC ACCUM WFC F606W 1 2 none none 1 N/A CODEEPFIELD 1 ACS/WFC ACCUM WFC F606W 2 1 none none 1 N/A CODEEPFIELD 1 ACS/WFC ACCUM WFC F606W 2 2 none none 1 N/A 13384( 2) - 27-Jun-2013 10:55:59 - [ 6] Visit: 02 Visit Requirements: On Hold Comments: Additional Comments: Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exp | Target | Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Num | Name | Config | Mode | or FOV |Element |Waveln.| Parameters |Exp| (Total) | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 1 CODEEPFIELD WFC3/IR MULTIAC IR-FIX F160W NSAMP=14, SAMP-SEQ=SPARS100 1 DEF POS TARG -3.3875, CUM (1302.936 -3.0275 S) ------------------------------------------------------------------------------------------------------------------------------------ 2 CODEEPFIELD WFC3/IR MULTIAC IR-FIX F160W NSAMP=15, SAMP-SEQ=SPARS100 1 DEF POS TARG -3.8615, CUM (1402.937 -3.4515 S) ------------------------------------------------------------------------------------------------------------------------------------ 3 CODEEPFIELD WFC3/IR MULTIAC IR-FIX F160W NSAMP=15, SAMP-SEQ=SPARS100 1 DEF POS TARG 3.3875, 3.0275 CUM (1402.937 S) ------------------------------------------------------------------------------------------------------------------------------------ 4 CODEEPFIELD WFC3/IR MULTIAC IR-FIX F160W NSAMP=15, SAMP-SEQ=SPARS100 1 DEF POS TARG 3.8615, 3.4515 CUM (1402.937 S) ------------------------------------------------------------------------------------------------------------------------------------ 5 CODEEPFIELD WFC3/IR MULTIAC IR-FIX F125W NSAMP=8, SAMP-SEQ=SPARS100 1 DEF POS TARG 3.8615, 3.4515 CUM (702.935 S) ------------------------------------------------------------------------------------------------------------------------------------ 6 CODEEPFIELD WFC3/IR MULTIAC IR-FIX F125W NSAMP=8, SAMP-SEQ=SPARS100 1 DEF POS TARG 3.3875, 3.0275 CUM (702.935 S) ------------------------------------------------------------------------------------------------------------------------------------ 7 CODEEPFIELD WFC3/IR MULTIAC IR-FIX F125W NSAMP=7, SAMP-SEQ=SPARS100 1 DEF POS TARG -3.3875, CUM (602.934 -3.0275 S) ------------------------------------------------------------------------------------------------------------------------------------ 8 CODEEPFIELD WFC3/IR MULTIAC IR-FIX F125W NSAMP=8, SAMP-SEQ=SPARS100 1 DEF POS TARG -3.8615, CUM (702.935 -3.4515 S) ------------------------------------------------------------------------------------------------------------------------------------ Sub Exposures ------------------------------------------------------------------------------------------------------------------------------------ Target | Exp |Instr | Oper. | Aper |Spectral|Cent.|Primary |Secondary |Iteration |CR-SPLIT |Orbit |Duration Name | Num |Config | Mode | or FOV |Element |Wave.|Pattern Pos |Pattern Pos |Num |Num |Number | ------------------------------------------------------------------------------------------------------------------------------------ CODEEPFIELD 1 WFC3/IR MULTIAC IR-FIX F160W none none none none 1 N/A CUM CODEEPFIELD 2 WFC3/IR MULTIAC IR-FIX F160W none none none none 1 N/A CUM 13384( 2) - 27-Jun-2013 10:55:59 - [ 7] Sub Exposures ------------------------------------------------------------------------------------------------------------------------------------ Target | Exp |Instr | Oper. | Aper |Spectral|Cent.|Primary |Secondary |Iteration |CR-SPLIT |Orbit |Duration Name | Num |Config | Mode | or FOV |Element |Wave.|Pattern Pos |Pattern Pos |Num |Num |Number | ------------------------------------------------------------------------------------------------------------------------------------ CODEEPFIELD 3 WFC3/IR MULTIAC IR-FIX F160W none none none none 2 N/A CUM CODEEPFIELD 4 WFC3/IR MULTIAC IR-FIX F160W none none none none 2 N/A CUM CODEEPFIELD 5 WFC3/IR MULTIAC IR-FIX F125W none none none none 3 N/A CUM CODEEPFIELD 6 WFC3/IR MULTIAC IR-FIX F125W none none none none 3 N/A CUM CODEEPFIELD 7 WFC3/IR MULTIAC IR-FIX F125W none none none none 3 N/A CUM CODEEPFIELD 8 WFC3/IR MULTIAC IR-FIX F125W none none none none 3 N/A CUM 13384( 2) - 27-Jun-2013 10:55:59 - [ 8] Summary Form for Proposal 13384 Item Used in this proposal ------------------------------------------------------------------------------------------------------------------------------------ Apertures IR-FIX, WFC ------------------------------------------------------------------------------------------------------------------------------------ Configurations ACS/WFC, WFC3/IR ------------------------------------------------------------------------------------------------------------------------------------ Opmodes ACCUM, MULTIACCUM ------------------------------------------------------------------------------------------------------------------------------------ Optional Parameters CR-SPLIT=NO, NSAMP=14, NSAMP=15, NSAMP=7, NSAMP=8, SAMP-SEQ=SPARS100 ------------------------------------------------------------------------------------------------------------------------------------ Special Requirements PATTERN 1 1, POS TARG -3.3875, -3.0275, POS TARG -3.8615, -3.4515, POS TARG 3.3875, 3.0275, POS TARG 3.8615, 3.4515 ------------------------------------------------------------------------------------------------------------------------------------ Spectral Elements F125W, F160W, F606W ------------------------------------------------------------------------------------------------------------------------------------ Target Names CODEEPFIELD ------------------------------------------------------------------------------------------------------------------------------------