Carol's favourite topics
Carolina Cuesta-Lazaro
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IAIFI Fellow (CfA/MIT)
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Observe galaxies
4
Pick your favourite analytical likelihood (Gaussian!)
5
Compute ~1Million times to get posterior
Constrain cosmology 101
Missing Information!
Perturbation Theory inaccurate / hard to compute
Is it always true?
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Work on your analytical theory
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Count pairs as a function of distance
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+ Galaxy formation
+ Observational systematics (Cut-sky, Fiber collisions)
+ Lightcone, Redshift Space Distortions....
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Forward Model
N-body simulations
Observations
SIMBIG arXiv:2211.00723
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Credit: Siddharth Mishra-Sharma
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We can simulate the observable Universe, we just need hydrodynamical simulations
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Super massive black hole seeding in dark matter halos
BH feedback impacts galactic scales
Black holes can also growth through mergers
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they can even teleport!
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Can ML bridge the scale gap to help us carry out full physics simulations across all scales?
Subresolution models
(Credit: http://tigress-web.princeton.edu/~changgoo/)
Resolving star formation
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We can't model galaxy formation, how do we make our models robust?
Robust Summarisation
Summariser (neural net)
Increase the evidence of the observations
Sims misspecified
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deck
By carol cuesta
deck
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