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Reduced convergence and the local smoothness parameter: bridging two different descriptions of weak lensing amplification
Yun Wang, Jason Tenbarge, Bobby Fleshman
Weak gravitational lensing due to the inhomogeneous matter distribution in the universe is an important systematic uncertainty in the use of standard candles in cosmology. There ar…
Model-Independent Reconstruction of the Primordial Power Spectrum from WMAP Data
Pia Mukherjee, Yun Wang
Reconstructing the shape of the primordial power spectrum in a model independent way from cosmological data is a useful consistency check on what is usually assumed regarding early…
Galaxy Clustering and Dark Energy
Dipak Munshi, Cristiano Porciani, Yun Wang
We study the evolution of galaxy clustering in various cosmological models with quintessence. We investigate how the analytical predictions vary with change of dark energy equation…
Future Type Ia Supernova Data as Tests of Dark Energy from Modified Friedmann Equations
Yun Wang, Katherine Freese, Paolo Gondolo +1
In the Cardassian model, dark energy density arises from modifications to the Friedmann equation, which becomes $H^2 = g(\rhom)$, where $g(\rhom)$ is a new function of the energy d…
Direct Wavelet Expansion of the Primordial Power Spectrum
Pia Mukherjee, Yun Wang
In order to constrain and possibly detect unusual physics during inflation, we allow the power spectrum of primordial matter density fluctuations, P_{in}(k), to be an arbitrary fun…
Wavelet Band Powers of the Primordial Power Spectrum from CMB Data
Pia Mukherjee, Yun Wang
Measuring the primordial matter power spectrum is our primary means of probing unknown physics in the very early universe. We allow the primordial power spectrum to be an arbitrary…