6 papers
Unbiased analysis of primordial non-Gaussianity: the multipoles of the full relativistic power spectrum
Chris Addis, Sêcloka L. Guedezounme, Jessie Hammond +5
A major goal of ongoing and future cosmological surveys of the large-scale structure is to measure local type primordial non-Gaussianity in the galaxy power spectrum through the sc…
Impact of lensing magnification on the power spectrum turnover
Yolanda Dube, Roy Maartens, Bikash R. Dinda +2
The turnover scale of the matter power spectrum -- and consequently of the standard galaxy power spectrum monopole -- encodes a fundamental signature of matter-radiation equa…
Turnover detection using the power spectrum and bispectrum
Yolanda Dube, Bikash R. Dinda, Sheean Jolicoeur +1
The turnover at the peak of the Fourier matter power spectrum encodes a fundamental signature of matter-radiation equality in the early Universe. This delivers a potential standard…
Multi-tracing the primordial Universe with future surveys
Mponeng Kopana, Sheean Jolicoeur, Roy Maartens
The fluctuations generated by Inflation are nearly Gaussian in the simplest models, but may be non-Gaussian in more complex models, potentially leading to signatures in the late Un…
Primordial non-Gaussianity -- the effects of relativistic and wide-angle corrections to the power spectrum
Sêcloka L. Guedezounme, Sheean Jolicoeur, Roy Maartens
Wide-angle and relativistic corrections to the Newtonian and flat-sky approximations are important for accurate modeling of the galaxy power spectrum of next-generation galaxy surv…
Constraining primordial non-Gaussianity by combining photometric galaxy and 21cm intensity mapping surveys
Mponeng Kopana, Sheean Jolicoeur, Roy Maartens
The fluctuations produced during cosmic inflation may exhibit non-Gaussian characteristics that are imprinted in the large-scale structure of the Universe. This non-Gaussian imprin…