15910( 7) - 01-Apr-2020 14:25:15 - [ 1] HUBBLE SPACE TELESCOPE OBSERVING PROGRAM 15910 Version: 7 Check-in Time: 01-Apr-2020 14:25:15 STScI Edit Number: 1 Title Galaxy evolution in a massive z=2.91 halo fed by cold accretion ------------------------------------------------------------------------------------ Type Cycle GO 27 ------------------------------------------------------------------------------------ Investigators Contact? PI: Dr. Emanuele Daddi Commissariat a l'Energie Atomique (CEA) Y CoI: Dr. R. Michael Rich University of California - Los Angeles N CoI: Dr. Francesco Maria Valentino University of Copenhagen, Niels Bohr N Institute CoI: Dr. James D. Neill California Institute of Technology N CoI: Mr. Donal O'Sullivan California Institute of Technology N CoI: Dr. Veronica Strazzullo Universita degli Studi di Trieste N ------------------------------------------------------------------------------------ Abstract We have recently discovered and spectroscopically confirmed a structure consistent with a forming, single massive halo at z=2.91 in the COSMOS field. With a total mass estimated at about 5x10^13, this is the highest redshift bonafide cluster/group known to date. Keck/KCWI observations revealed a luminous Lya nebula well centered on the stellar mass overdensity, surrounded by three filaments with a factor of 10 lower surface brightness, extending over a 320pkpc diameter out to the virial radius. A variety of observables suggest that we are in presence of a textbook-case of cold accretion onto a massive high-z halo. The existing multiwavelength data, including the COSMOS single orbit with F814W, only scratch the surface of the galaxy content of this system. We propose 11 orbits of HST imaging with WFC3IR in F160W/F125W and WFC3/UV F606W that will allow us to obtain a complete census of the galaxies inhabiting this structure down to low stellar masses, together with passive/star forming classification and morphological information. The bluer filters will unveil any unreddened star formation down to very deep levels, complementing the information about dust-obscured star formation from ALMA, NOEMA, and radio. We will be able to distinguish physical properties of galaxies located in the halo core, in the accreting filaments, and outside of them. Given the importance to study galaxy transformations, quenching, and the role of gas accretion on galaxy evolution in massive halos at the highest possible redshift, this program represents a unique opportunity of carrying out this kind of investigation at the frontiers of current knowledge. ------------------------------------------------------------------------------------ Observations Description ------------------------ This is a simple WFC3 imaging proposal of a single target in 3 filters. We have defined a single visit for observations in F606W and F125W, in order to have control on the resulting dithering pattern which will optimize coverage and PSF reconstruction. The 5 orbits of F160W imaging are split into two visits to easy scheduling. ------------------------------------------------------------------------------------ 15910( 7) - 01-Apr-2020 14:25:15 - [ 2] TARGET LIST Fixed Targets ------------------------------------------------------------------------------------------------------------------------------------ Tar| Target | Target | Target |Coord | Radial | Flux data No | Name | Description | Position |Eqnx | Vel. | ------------------------------------------------------------------------------------------------------------------------------------ 1 RO-1001 CLUSTER OF GALAXIES, RA=10H01M23.0140S, J2000 V = 25 EMISSION LINE NEBULA DEC=+02D20'2.73" Reference Frame: ICRS ------------------------------------------------------------------------------------------------------------------------------------ 15910( 7) - 01-Apr-2020 14:25:15 - [ 3] Patterns ------------------------------------------------------------------------------------------------------------------------------------ Pattern_Number: 3 Primary_Pattern Secondary_Pattern Pattern_Type WFC3-IR-DITHER-BLOB WFC3-IR-DITHER-LINE Pattern_Purpose DITHER DITHER Number_Of_Points 5 3 Point_Spacing 5.183 0.636 Line_Spacing Coordinate_Frame POS-TARG POS-TARG Pattern_Orient 41.859 41.788 Angle_Between_Sides Center_Pattern YES YES ------------------------------------------------------------------------------------------------------------------------------------ Pattern_Number: 4 Primary_Pattern Secondary_Pattern Pattern_Type WFC3-IR-DITHER-BLOB WFC3-IR-DITHER-LINE Pattern_Purpose DITHER DITHER Number_Of_Points 3 5 Point_Spacing 5.183 0.636 Line_Spacing Coordinate_Frame POS-TARG POS-TARG Pattern_Orient 41.859 41.788 Angle_Between_Sides Center_Pattern YES YES ------------------------------------------------------------------------------------------------------------------------------------ Pattern_Number: 5 Primary_Pattern Secondary_Pattern Pattern_Type WFC3-IR-DITHER-BLOB WFC3-IR-DITHER-LINE Pattern_Purpose DITHER DITHER Number_Of_Points 2 5 Point_Spacing 5.183 0.636 Line_Spacing Coordinate_Frame POS-TARG POS-TARG Pattern_Orient 41.859 41.788 Angle_Between_Sides Center_Pattern YES NO ------------------------------------------------------------------------------------------------------------------------------------ Pattern_Number: 6 Primary_Pattern Secondary_Pattern Pattern_Type WFC3-UVIS-GAP-LINE WFC3-UVIS-DITHER-LINE-3PT Pattern_Purpose MOSAIC DITHER Number_Of_Points 2 3 Point_Spacing 2.414 1.485 Line_Spacing Coordinate_Frame POS-TARG POS-TARG Pattern_Orient 85.759 46.84 Angle_Between_Sides Center_Pattern YES NO ------------------------------------------------------------------------------------------------------------------------------------ 15910( 7) - 01-Apr-2020 14:25:15 - [ 4] 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 RO-1001 WFC3/IR MULTIAC IR F160W SAMP-SEQ=SPARS50, NSAMP=11 1 DEF PATTERN 4 1 CUM (7544.052 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 | ------------------------------------------------------------------------------------------------------------------------------------ RO-1001 1 WFC3/IR MULTIAC IR F160W 1 1 none none 1 N/A CUM RO-1001 1 WFC3/IR MULTIAC IR F160W 1 2 none none 1 N/A CUM RO-1001 1 WFC3/IR MULTIAC IR F160W 1 3 none none 1 N/A CUM RO-1001 1 WFC3/IR MULTIAC IR F160W 1 4 none none 1 N/A CUM RO-1001 1 WFC3/IR MULTIAC IR F160W 1 5 none none 1 N/A CUM RO-1001 1 WFC3/IR MULTIAC IR F160W 2 1 none none 2 N/A CUM RO-1001 1 WFC3/IR MULTIAC IR F160W 2 2 none none 2 N/A CUM RO-1001 1 WFC3/IR MULTIAC IR F160W 2 3 none none 2 N/A CUM RO-1001 1 WFC3/IR MULTIAC IR F160W 2 4 none none 2 N/A CUM RO-1001 1 WFC3/IR MULTIAC IR F160W 2 5 none none 2 N/A CUM RO-1001 1 WFC3/IR MULTIAC IR F160W 3 1 none none 3 N/A CUM RO-1001 1 WFC3/IR MULTIAC IR F160W 3 2 none none 3 N/A CUM RO-1001 1 WFC3/IR MULTIAC IR F160W 3 3 none none 3 N/A CUM RO-1001 1 WFC3/IR MULTIAC IR F160W 3 4 none none 3 N/A CUM RO-1001 1 WFC3/IR MULTIAC IR F160W 3 5 none none 3 N/A CUM 15910( 7) - 01-Apr-2020 14:25:15 - [ 5] Visit: 06 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 RO-1001 WFC3/IR MULTIAC IR F125W SAMP-SEQ=SPARS50, NSAMP=11 1 DEF PATTERN 3 1 CUM (7544.052 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 | ------------------------------------------------------------------------------------------------------------------------------------ RO-1001 1 WFC3/IR MULTIAC IR F125W 1 1 none none 1 N/A CUM RO-1001 1 WFC3/IR MULTIAC IR F125W 1 2 none none 1 N/A CUM RO-1001 1 WFC3/IR MULTIAC IR F125W 1 3 none none 1 N/A CUM RO-1001 1 WFC3/IR MULTIAC IR F125W 2 1 none none 1 N/A CUM RO-1001 1 WFC3/IR MULTIAC IR F125W 2 2 none none 1 N/A CUM RO-1001 1 WFC3/IR MULTIAC IR F125W 2 3 none none 2 N/A CUM RO-1001 1 WFC3/IR MULTIAC IR F125W 3 1 none none 2 N/A CUM RO-1001 1 WFC3/IR MULTIAC IR F125W 3 2 none none 2 N/A CUM RO-1001 1 WFC3/IR MULTIAC IR F125W 3 3 none none 2 N/A CUM RO-1001 1 WFC3/IR MULTIAC IR F125W 4 1 none none 2 N/A CUM RO-1001 1 WFC3/IR MULTIAC IR F125W 4 2 none none 3 N/A CUM RO-1001 1 WFC3/IR MULTIAC IR F125W 4 3 none none 3 N/A CUM RO-1001 1 WFC3/IR MULTIAC IR F125W 5 1 none none 3 N/A CUM RO-1001 1 WFC3/IR MULTIAC IR F125W 5 2 none none 3 N/A CUM RO-1001 1 WFC3/IR MULTIAC IR F125W 5 3 none none 3 N/A CUM 15910( 7) - 01-Apr-2020 14:25:15 - [ 6] Visit: 09 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 RO-1001 WFC3/UVI ACCUM UVIS F606W 1 1336 S PATTERN 6 1 S (8016 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 | ------------------------------------------------------------------------------------------------------------------------------------ RO-1001 1 WFC3/UVI ACCUM UVIS F606W 1 1 none none 1 N/A S RO-1001 1 WFC3/UVI ACCUM UVIS F606W 1 2 none none 1 N/A S RO-1001 1 WFC3/UVI ACCUM UVIS F606W 1 3 none none 2 N/A S RO-1001 1 WFC3/UVI ACCUM UVIS F606W 2 1 none none 2 N/A S RO-1001 1 WFC3/UVI ACCUM UVIS F606W 2 2 none none 3 N/A S RO-1001 1 WFC3/UVI ACCUM UVIS F606W 2 3 none none 3 N/A S 15910( 7) - 01-Apr-2020 14:25:15 - [ 7] Visit: 10 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 RO-1001 WFC3/IR MULTIAC IR F160W SAMP-SEQ=SPARS50, NSAMP=11 1 DEF PATTERN 5 1 CUM (5029.368 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 | ------------------------------------------------------------------------------------------------------------------------------------ RO-1001 1 WFC3/IR MULTIAC IR F160W 1 1 none none 1 N/A CUM RO-1001 1 WFC3/IR MULTIAC IR F160W 1 2 none none 1 N/A CUM RO-1001 1 WFC3/IR MULTIAC IR F160W 1 3 none none 1 N/A CUM RO-1001 1 WFC3/IR MULTIAC IR F160W 1 4 none none 1 N/A CUM RO-1001 1 WFC3/IR MULTIAC IR F160W 1 5 none none 1 N/A CUM RO-1001 1 WFC3/IR MULTIAC IR F160W 2 1 none none 2 N/A CUM RO-1001 1 WFC3/IR MULTIAC IR F160W 2 2 none none 2 N/A CUM RO-1001 1 WFC3/IR MULTIAC IR F160W 2 3 none none 2 N/A CUM RO-1001 1 WFC3/IR MULTIAC IR F160W 2 4 none none 2 N/A CUM RO-1001 1 WFC3/IR MULTIAC IR F160W 2 5 none none 2 N/A CUM 15910( 7) - 01-Apr-2020 14:25:15 - [ 8] Visit: 50 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 RO-1001 WFC3/IR MULTIAC IR F160W SAMP-SEQ=SPARS50, NSAMP=11 1 DEF PATTERN 5 1 CUM (5029.368 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 | ------------------------------------------------------------------------------------------------------------------------------------ RO-1001 1 WFC3/IR MULTIAC IR F160W 1 1 none none 1 N/A CUM RO-1001 1 WFC3/IR MULTIAC IR F160W 1 2 none none 1 N/A CUM RO-1001 1 WFC3/IR MULTIAC IR F160W 1 3 none none 1 N/A CUM RO-1001 1 WFC3/IR MULTIAC IR F160W 1 4 none none 1 N/A CUM RO-1001 1 WFC3/IR MULTIAC IR F160W 1 5 none none 1 N/A CUM RO-1001 1 WFC3/IR MULTIAC IR F160W 2 1 none none 2 N/A CUM RO-1001 1 WFC3/IR MULTIAC IR F160W 2 2 none none 2 N/A CUM RO-1001 1 WFC3/IR MULTIAC IR F160W 2 3 none none 2 N/A CUM RO-1001 1 WFC3/IR MULTIAC IR F160W 2 4 none none 2 N/A CUM RO-1001 1 WFC3/IR MULTIAC IR F160W 2 5 none none 2 N/A CUM 15910( 7) - 01-Apr-2020 14:25:15 - [ 9] Summary Form for Proposal 15910 Item Used in this proposal ------------------------------------------------------------------------------------------------------------------------------------ Apertures IR, UVIS ------------------------------------------------------------------------------------------------------------------------------------ Configurations WFC3/IR, WFC3/UVIS ------------------------------------------------------------------------------------------------------------------------------------ Opmodes ACCUM, MULTIACCUM ------------------------------------------------------------------------------------------------------------------------------------ Optional Parameters NSAMP=11, SAMP-SEQ=SPARS50 ------------------------------------------------------------------------------------------------------------------------------------ Special Requirements PATTERN 3 1, PATTERN 4 1, PATTERN 5 1, PATTERN 6 1 ------------------------------------------------------------------------------------------------------------------------------------ Spectral Elements F125W, F160W, F606W ------------------------------------------------------------------------------------------------------------------------------------ Target Names RO-1001 ------------------------------------------------------------------------------------------------------------------------------------