Difference between revisions of "UMICH-2015: CMB-Lensing break-out session 2"

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Blake - CMB delensing, CMB lensing cross correlated with galaxy surveys, CMB lensing cross correlated with optical weak lensing, parameter forecasts, instrument requirements,  survey requirements, systematic challenges (20 min)
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==Delensing Details==
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[[File:delensing.pdf]]
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Questions for discussion
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#Experiment design
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#*Can we combine different experiments, and is it worth having two different noise levels on two experiments (high-res + low-res)
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#Algorithms - Quadratic Estimator / Iterative / Sampling
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#*What is the best algorithm to use?
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#*How low ell do we use/need for reconstruction?
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#Systematics and Delensing
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#*Dust foregrounds and sources - how do they propagate through the delensing procedure? How much do they matter?
 +
#*Instrumental systematics, higher order biases, LSS non-Gaussianity - any concerns for delensing?
 +
#Analysis of Delensed Maps
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#*What are the statistical and noise properties of the delensed maps? How to construct likelihoods?
 +
 
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==CMB Lensing Cross-correlations==
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[[File:crosses.pdf]]
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Questions for discussion:
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#weak lensing calibration: cross-correlations with LSST / Euclid / ... weak lensing
 +
#*how precise are the correlations?
 +
#*is this level of multiplicative bias calibration interesting?
 +
#*are intrinsic alignments a limiting factor?
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#clustering from correlations with DESI/Euclid/LSST galaxies / quasars / ...
 +
#*how well can biases be modeled and constrained?
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#*can these observables be used cleanly and powerful enough to detect neutrino mass?
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#*what are the key science drivers in extragalactic astrophysics?
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#other surveys
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#*would overlap with external datasets gain from a northern site?
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#*is there a way to make use of cross-correlations with Ly-alpha or intensity mapping, or are the modes they probe too different?
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#*prospects and challenges for cluster mass calibration with CMB lensing?
  
 
==Wiki navigation==
 
==Wiki navigation==

Latest revision as of 08:52, 22 September 2015

Delensing Details

File:Delensing.pdf

Questions for discussion

  1. Experiment design
    • Can we combine different experiments, and is it worth having two different noise levels on two experiments (high-res + low-res)
  2. Algorithms - Quadratic Estimator / Iterative / Sampling
    • What is the best algorithm to use?
    • How low ell do we use/need for reconstruction?
  3. Systematics and Delensing
    • Dust foregrounds and sources - how do they propagate through the delensing procedure? How much do they matter?
    • Instrumental systematics, higher order biases, LSS non-Gaussianity - any concerns for delensing?
  4. Analysis of Delensed Maps
    • What are the statistical and noise properties of the delensed maps? How to construct likelihoods?

CMB Lensing Cross-correlations

File:Crosses.pdf

Questions for discussion:

  1. weak lensing calibration: cross-correlations with LSST / Euclid / ... weak lensing
    • how precise are the correlations?
    • is this level of multiplicative bias calibration interesting?
    • are intrinsic alignments a limiting factor?
  2. clustering from correlations with DESI/Euclid/LSST galaxies / quasars / ...
    • how well can biases be modeled and constrained?
    • can these observables be used cleanly and powerful enough to detect neutrino mass?
    • what are the key science drivers in extragalactic astrophysics?
  3. other surveys
    • would overlap with external datasets gain from a northern site?
    • is there a way to make use of cross-correlations with Ly-alpha or intensity mapping, or are the modes they probe too different?
    • prospects and challenges for cluster mass calibration with CMB lensing?

Wiki navigation

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