This a submission to the cycle 32 WFC3-IR bridge program
-232401892
Assigned ID: 5951
----- Attempting Submission 1 (Fri Nov 01 22:56:02 GMT 2024) -----
As per correspondence with STSCI we increased the spacing of the dither pattern to avoid issues related to persistence of the bright QSO images. This had to be done manually by creating four sub exposures in order to maximize exposure time.
-968619987
----- Attempting Submission 1 (Thu Jan 23 17:04:17 GMT 2025) -----
----- Attempting Submission 2 (Tue Feb 04 20:50:30 GMT 2025) -----
Dark matter, the Hubble tension, and the stellar IMF from HST imaging of quadruply imaged quasars
What's dark matter? What's the source of the "Hubble tension"? Is the stellar initial mass function universal? What's the structure of accretion disks? How do the correlations between quasar black hole mass and the properties of their host galaxies evolve over cosmic time?
HST images of quadruply imaged quasars (quads) have been demonstrated to provide unique ways to address all these fundamental questions. Unfortunately, quads are very rare in the sky, and only a few tens are known. Thus, all the studies based on quads are limited in their precision by small number statistics, as only a subset can typically be used for each application, owing to the diversity of configurations. We propose to image 17 recently discovered quads with WFC3-IR to cement the HST legacy and build a bridge to the future, when 100-1000s of lenses will be known from Euclid/Rubin/Roman. WFC3-IR images are essential to detect the stellar light of the lens galaxy and the lensed QSO host. With its well known PSF WFC3-IR, this sample will be the foundation of future lens modeling with Roman and JWST. In the immediate future, this sample will enable, e.g., the determination of H0 at <2% fully accounting for the mass sheet degeneracy; distinguishing Salpeter and Chabrier IMF at 99% CL for massive ellipticals, and detect a potential turnover in the subhalo mass function down to 10^6.5 solar masses (corresponding to a thermal dark matter mass of 7.7 kev).
We will obtain WFC3-IR F160W images of a sample of quadruply imaged quasar. We use a 4-point dither pattern, and STEP100 readout sequence to guarantee sufficient dynamic range to expose both the bright quasar and the host galaxy.
The team includes experts in all the relevant science cases. The PI has 20+ years of experience as Hubble uses, including being the PI of the previous proposals that are building up the legacy quads dataset, and has written multiple reviews.
CL, RGM, AA, PLS, NS, AC, CS, WS, ADW, EZ, CDF, TT, DS have discovered a large fraction of all known lensed quasars, including the targets of this proposal through dedicated lens searches.
AMN, DS, SB, CDF, TT, DG, IZ, are experts in dark matter studies from strong lenses.
SB, TS, AS, SS, are experts in lens modeling.
VM, TA, PLS are experts in microlensing.
TT and PLS have studied extensively the IMF of lens galaxies.
CS, TT, SK are experts in dynamical modeling of lens galaxies.
FC has been leading monitoring campaigns of lensed quasars for over 20 years.
We have expertise in data analysis and lens modeling, and we have the resources to gather all the ancillary datasets.
Large Scale Structure of the Universe
0
false
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SUPPORTED
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(Tic-Orbit
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:max-dark-utilization 1920
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true
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The scheduling data was generated by CASM 33.0.
CASM was run in Phase II mode.
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254.0405082799462
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:number-of-orbits 1
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:coron NIL
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(Tic-Obset
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:dark-offset NIL
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true
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0