Yuuki Omori

About

I'm a post-doctoral researcher at Kavli Institute of Cosmological Physics (KICP) and University of Chicago. I obtained my Ph.D. in 2018 from McGill University in Montreal Canada. My official page can be found here, my inSPIRE page can be found here, and my Linkedin page can be found here.

I work with both CMB and galaxy experiments, and work with the South Pole Telescope (SPT) and the Dark Energy Survey (DES) collaborations. My research primarily focuses on the CMB weak lensing, galaxy weak lensing, galaxy distributions and the relationship between them. At stanford I'm also starting to work with the BICEP/Keck collaboration, and hoping to get involved with Litebird/LSST/DESI.

I also spend too much time creating color maps to use for plots. See here .

projects

Making CMB lensing maps
The cosmic microwave background (CMB) is a diffuse background of light emitted when the Universe was approximately 379,000 years old. The photons path gets distrubed due to the gravitational potential of all the nearby structures. Therefore, the CMB that we observe is a slightly distored view of the true CMB. The characteristic of the true CMB is however known reall well, and any deviation from it can be attributed to lensing, and from this we could reconstruct the lensing map. This lensing map we create is essentially a projection of all the mass in the Universe.

CMB lensing - galaxy-lensing - galaxy clustering
Galaxies form at the peaks of the density field. These galaxies live in halos made of dark matter, which make up approximately 25% of the Universe. Dark matter halos in the nearby Universe distort the paths of photons coming from both background galaxies and the CMB, and therefore we expect these observables to be correlated. From these correlations, we try to extract cosmological information.

kSZ from reionization
I 've recently started working on extracting the signatures from patchy reionizations using CMB experiment data.

CMB/LSS simuations
There are simulations for CMB or LSS separately but not many have both observables implemented. I have been working such a simulation suite based on the Multi-Dark Planck 2 simulation. The simulation includes CMB lensing/tSZ/kSZ/CIB (Planck/SPT-SZ/SPT-3G) as well as galaxy lensing (DES-Y1/VRO-Y1). Project page

Notes

I've moved all my research notes to here

Papers

2018
[-] Dark Energy Survey Year 1 Results: Cross-correlation between DES Y1 galaxy weak lensing and SPT+Planck CMB weak lensing
[-] Dark Energy Survey Year 1 Results: Joint Analysis of Galaxy Clustering, Galaxy Lensing, and CMB Lensing Two-point Functions
[-] Dark Energy Survey Year 1 Results: tomographic cross-correlations between DES galaxies and CMB lensing from SPT+Planck
[-] Cosmological lensing ratios with DES Y1, SPT and Planck
[-] Maps of the Southern Millimeter-wave Sky from Combined 2500 sq.deg SPT-SZ and Planck Temperature Data
[-] Dark Energy Survey Year 1 Results: Methodology and Projections for Joint Analysis of Galaxy Clustering, Galaxy Lensing, and CMB Lensing Two-point Functions
2017
[-] Constraints on Cosmological Parameters from the Angular Power Spectrum of a Combined 2500 sq.deg SPT-SZ and Planck Gravitational Lensing Map
[-] A Measurement of CMB Cluster Lensing with SPT and DES Year 1 Data
[-] A Comparison of Cosmological Parameters Determined from CMB Temperature Power Spectra from the South Pole Telescope and the Planck Satellite
[-] Dark Energy Survey Year 1 Results: Multi-Probe Methodology and Simulated Likelihood Analyses
[-] A 2500 sq.deg CMB Lensing Map from Combined South Pole Telescope and Planck Data
[-] A Comparison of Maps and Power Spectra Determined from South Pole Telescope and Planck Data
2016
[-] Detection of the kinematic Sunyaev–Zel'dovich effect with DES Year 1 and SPT
[-] Joint measurement of lensing–galaxy correlations using SPT and DES SV data
2015
[-] Cross-correlation of gravitational lensing from DES Science Verification data with SPT and Planck lensing
[-] CMB lensing tomography with the DES Science Verification galaxies
[-] Cross-Correlation of CFHTLenS Galaxy Number Density and Planck CMB Lensing
2013
[-] A submillimetre-bright z~3 overdensity behind a z~1 supercluster revealed by SCUBA-2 and Herschel
[-] Nurturing Lyman Break Galaxies: Observed link between environment and spectroscopic features
2012
[-] Super-luminous supernovae at redshifts of 2.05 and 3.90

talks

[08/03/2023] Lensing at Different Scales Workshop, Chicago
[08/01/2023] Astro Imaging Workshop, Northwestern

Personal

Elements

i = 0;

while (!deck.isInOrder()) {
    print 'Iteration ' + i;
    deck.shuffle();
    i++;
}

print 'It took ' + i + ' iterations to sort the deck.';