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12 papers · 2 filters
The Power of Locality: Primordial Non-Gaussianity at the Map Level
Daniel Baumann, Daniel Green
Primordial non-Gaussianity is a sensitive probe of the inflationary era, with a number of important theoretical targets living an order of magnitude beyond the reach of current CMB…
The reheating constraints to natural inflation in Horndeski gravity
Chen-Hsu Chien, Seoktae Koh, Gansukh Tumurtushaa
For the subclass of Horndeski theory of gravity, we investigate the effects of reheating on the predictions of natural inflation. In the presence of derivative self-interaction of…
One Small Step for an Inflaton, One Giant Leap for Inflation: a novel non-Gaussian tail and primordial black holes
Yi-Fu Cai, Xiao-Han Ma, Misao Sasaki +2
We report a novel prediction from single-field inflation that even a tiny step in the inflaton potential can change our perception of primordial non-Gaussianities of the curvature…
Primordial Black Hole Formation in Non-Minimal Curvaton Scenario
Shi Pi, Misao Sasaki
In the curvaton scenario, the curvature perturbation is generated after inflation at the curvaton decay, which may have a prominent non-Gaussian effect. For a model with a non-triv…
Distinguishing between CDM and gravity models using halo ellipticity correlations in simulations
Yao-Tsung Chuang, Teppei Okumura, Masato Shirasaki
There is a growing interest in utilizing intrinsic alignment (IA) of galaxy shapes as a geometric and dynamical probe of cosmology. In this paper we present the first measurements…
A Partial-Sky Gibbs ILC Approach for the Estimation of CMB Posterior over Large Angular Scales of the Sky
Vipin Sudevan, Ujjal Purkayastha, Rajib Saha
In this article we present a formalism to incorporate the partial-sky maps to the Gibbs ILC algorithm to estimate the joint posterior density of the Cosmic Microwave Background (CM…