Zobrazeno 1 - 10
of 158
pro vyhledávání: '"Cahn, Robert N."'
A tetrahedron is the simplest shape that cannot be rotated into its mirror image in 3D. The 4-Point Correlation Function (4PCF), which quantifies excess clustering of quartets of galaxies over random, is the lowest-order statistic sensitive to parity
Externí odkaz:
http://arxiv.org/abs/2206.03625
We show that the galaxy 4-Point Correlation Function (4PCF) can test for cosmological parity violation. The detection of cosmological parity violation would reflect previously unknown forces present at the earliest moments of the Universe. Recent dev
Externí odkaz:
http://arxiv.org/abs/2110.12004
We derive analytic covariance matrices for the $N$-Point Correlation Functions (NPCFs) of galaxies in the Gaussian limit. Our results are given for arbitrary $N$ and projected onto the isotropic basis functions of Cahn & Slepian (2020), recently show
Externí odkaz:
http://arxiv.org/abs/2108.01714
Autor:
Philcox, Oliver H. E., Slepian, Zachary, Hou, Jiamin, Warner, Craig, Cahn, Robert N., Eisenstein, Daniel J.
We present a new algorithm for efficiently computing the $N$-point correlation functions (NPCFs) of a 3D density field for arbitrary $N$. This can be applied both to a discrete spectroscopic galaxy survey and a continuous field. By expanding the stat
Externí odkaz:
http://arxiv.org/abs/2105.08722
Autor:
Cahn, Robert N., Slepian, Zachary
Isotropic functions of positions $\hat{\bf r}_1, \hat{\bf r}_2,\ldots, \hat{\bf r}_N$, i.e. functions invariant under simultaneous rotations of all the coordinates, are conveniently formed using spherical harmonics and Clebsch-Gordan coefficients. An
Externí odkaz:
http://arxiv.org/abs/2010.14418
Autor:
Bianchi, Davide, Burden, Angela, Percival, Will J., Brooks, David, Cahn, Robert N., Forero-Romero, Jaime E., Levi, Michael, Ross, Ashley J., Tarle, Gregory
Publikováno v:
2018MNRAS.481.2338B
The Emission Line Galaxy survey made by the Dark Energy Spectroscopic Instrument (DESI) survey will be created from five passes of the instrument on the sky. On each pass, the constrained mobility of the ends of the fibres in the DESI focal plane mea
Externí odkaz:
http://arxiv.org/abs/1805.00951
The Dark Energy Spectroscopic Instrument (DESI), a multiplexed fiber-fed spectrograph, is a Stage-IV ground-based dark energy experiment aiming to measure redshifts for 29 million Emission-Line Galaxies (ELG), 4 million Luminous Red Galaxies (LRG), a
Externí odkaz:
http://arxiv.org/abs/1611.05007