0 Assigned ID: 960 ----- Attempting Submission 1 (Fri Apr 10 22:33:31 GMT 2015) ----- HST Phase I Proposal 960 (PhaseI.apt) successfully submitted. Receipt: # 960-1 Added some ORIENT restrictions to avoid diffraction spikes from H~11 stars potentially affecting the main target in the WFC3-IR observations, as suggested by Contact Scientist Russell Ryan. These should not reduce schedulability. -1625305569 ----- Attempting Submission 1 (Tue Jul 21 06:29:27 GMT 2015) ----- ----- Attempting Submission 2 (Mon Oct 05 19:02:08 GMT 2015) ----- Early Quiescent Galaxies Under the Magnifying Glass By a redshift of z~2, half of the massive galaxy (>10^11 Msol) population consists of systems with little or no star formation and physical sizes that are remarkably small (~1 kpc) for their mass. Much effort has been devoted to understanding the star-forming progenitors of these "red nuggets" and their substantial growth in size over the last 11 Gyr. However, major questions remain. A key barrier is our inability to resolve the structure and dynamics of these compact galaxies, which are only marginally resolved even with HST. This proposal addresses this limitation by harnessing gravitational lensing. We propose observations of two spectroscopically confirmed quiescent galaxies at z=2-3 that are magnified by foreground clusters. By coupling this magnification with HST resolution, our proposed observations with allow us to: (1) Resolve the central stellar densities of these galaxies within half of the effective radius, thereby stringently testing the hypothesized "inside out" growth paradigm and constraining the physical mechanisms driving size growth; (2) Probe the homogeneity of the stellar populations of these compact galaxies by measuring color gradients within ~1 kpc; (3) Construct lens models to interpret existing spatially-resolved NIR spectroscopy and measure resolved stellar kinematics for the first time in these systems. Our proposed targets are rare and valuable resources that provide the only route toward better resolving the internal structure of z>2 quiescent galaxies in advance of JWST. MACSJ0150.3-1005: One orbit of WFC3-IR imaging is divided between F160W and F125W filers. A four-point dither pattern is used for each filter to achieve optimal subpixel sampling. The BCG of the cluster is placed at the center of the array. PSZ1-G295.24-21.55: One orbit of WFC3-IR imaging is divided between F160W and F105W filters and is otherwise the same as for MACSJ0150 above. Two orbits of ACS imaging are equally divided between the F814W and F555W filters. Each ACS orbit employs a three-point ACS-WFC-DITHER-LINE pattern in order to span the chip gap and provide CR rejection. The BCG complex is placed at the WFC aperture above the chip gap. 2015 October 5: Added some ORIENT restrictions to avoid diffraction spikes from H~11 stars potentially affecting the main target in the WFC3-IR observations, as suggested by Contact Scientist Russell Ryan. These should not reduce schedulability. UNRESOLVED STELLAR POPULATIONS AND GALAXY STRUCTURE 12 false false false false 0.2 SUPPORTED CLUSTER OF GALAXIES GRAVITATIONAL LENS Centered on BCG. J2000 J2000 CLUSTER OF GALAXIES GRAVITATIONAL LENS Centered on BCGs. J2000 J2000 WFC3/IR Imaging No No F160W WFC3/IR Imaging No No F125W ACS/WFC Imaging No No F814W ACS/WFC Imaging No No F555W WFC3/IR Imaging No No F160W WFC3/IR Imaging No No F105W 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 3.011 LINE false true 3 85.28 ACS-WFC-DITHER-LINE 2 false The scheduling data was generated by CASM 23.2. CASM was run in Phase II mode. /private/var/folders/9x/z4vwrs3s3y98c55nlnjj9lm40000gn/T/OPVisit1487438116329655187.xml (Tic-Visit :proposal-id 14205 :visit-id "01" :proposal-version -1 :trans-version "20150609" :date "05-Oct-2015 11:58:31.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 1 :saa-model "30" :si-bright-earth-limb-angle 20.0 :data-volume 1671264 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 14205 :visit-id "01" :obset-id "01" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 14205 :visit-id "01" :orbit-number 1 :pcs-time 333 :si-vis-utilization 2868 :al-overhead-at-end 0 :internal-dur-at-end 671 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3218 :pcs-gap 0 ) true 1 0 The scheduling data was generated by CASM 23.2. CASM was run in Phase II mode. /private/var/folders/9x/z4vwrs3s3y98c55nlnjj9lm40000gn/T/OPVisit22334149239935379.xml (Tic-Visit :proposal-id 14205 :visit-id "02" :proposal-version -1 :trans-version "20150609" :date "05-Oct-2015 11:50:55.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 1 :saa-model "30" :si-bright-earth-limb-angle 20.0 :data-volume 1810528 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 14205 :visit-id "02" :obset-id "02" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 14205 :visit-id "02" :orbit-number 1 :pcs-time 333 :si-vis-utilization 3268 :al-overhead-at-end 0 :internal-dur-at-end 709 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3604 :pcs-gap 0 ) true 1 0 The scheduling data was generated by CASM 23.2. 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