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17 papers · 2 filters
Relic neutrinos: Physically consistent treatment of effective number of neutrinos and neutrino mass
Jeremiah Birrell, Cheng-Tao Yang, Pisin Chen +1
We perform a model independent study of the neutrino momentum distribution at freeze-out, treating the freeze-out temperature as a free parameter. Our results imply that measuremen…
Slow-Roll Inflation Preceded by a Topological Defect Phase à la Chaplygin Gas
Mariam Bouhmadi-Lopez, Pisin Chen, Yu-Chien Huang +1
We present a simple toy model corresponding to a network of frustrated topological defects of domain walls or cosmic strings that exist previous to the standard slow-roll inflation…
Inflation as a Solution to the Early Universe Entropy Problem
Pisin Chen, Po-Shen Hsin, Yuezhen Niu
There exists the "entropy problem" of the early universe, that is, why did the universe begin with an extremely low entropy and how did it evolve into such high entropy at late tim…
Sunyaev-Zel'dovich-Measured Pressure Profiles from the Bolocam X-ray/SZ Galaxy Cluster Sample
Jack Sayers, Nicole G. Czakon, Adam Mantz +14
We describe Sunyaev-Zel'dovich (SZ) effect measurements and analysis of the intracluster medium (ICM) pressure profiles of a set of 45 massive galaxy clusters imaged using Bolocam…
The Contribution of Radio Galaxy Contamination to Measurements of the Sunyaev-Zel'dovich Decrement in Massive Galaxy Clusters at 140 GHz with Bolocam
Jack Sayers, Tony Mroczkowski, Nicole G. Czakon +13
We describe in detail our characterization of the compact radio source population in 140 GHz Bolocam observations of a set of 45 massive galaxy clusters. We use a combination of 1.…
Reconstruction of f(R) models with Scale-invariant Power Spectrum
Taotao Qiu
Following our previous work in [JCAP 1206, 041 (2012)], in this paper, we continue our study of reconstructing modified gravity models that can be connected to a single scal…