Enrique Paillas, Pauline Zarrouk, Yan-Chuan Cai, Will Percival, Sesh Nadathur, Mathilde Pinon, Arnaud de Mattia, Florian Beuler
Constraining ΛCDM with density split statistics
Carolina Cuesta-Lazaro
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IAIFI fellow - MIT/CfA
arXiv:2209.04310
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Early Universe
~linear
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Gravity
Late Universe
Non-linear
Credit: S. Codis+16
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Non-Guassianity
Second moment not optimal
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arxiv:1911.11158
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Autocorrelation
Cross-correlation with haloes
Monopole
Quadrupole
Voids
Clusters
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Estimating sensitivity to cosmology: Fisher information
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The Quijote simulations
arXiv:1909.05273
Covariance
Derivatives
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Finite differences
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But, can we estimate densities realistically?
?
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Real
Redshift
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Cross-correlation between quintiles and haloes
Monopole
Quadrupole
Monopole
Quadrupole
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Autocorrelation of quintiles
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+ Galaxy-Halo connection
+ Cut-sky
+ Lightcone
+ Alcock-Paczinsky
+ Fiber collisions
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Forward Model
N-body simulations
Observations
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Credit: https://cs231n.github.io/convolutional-networks/
Neural Network emulator
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Patchy to estimate covariances
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Abacus HOD vs Uchuu SHAM
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Density split in a BOSS CMASS
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CMASS 0.46 < z < 0.6
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Copy of Copy of Copy of DensitySplit
By carol cuesta
Copy of Copy of Copy of DensitySplit
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