New Optimised Estimators for the Primordial Trispectrum (2009)
Munshi, Dipak, Heavens, Alan, Cooray, Asantha, Smidt, Joseph, Coles, Peter, Serra, Paolo
Cosmic microwave background studies of non-Gaussianity involving higher-order multispectra can distinguish between early universe theories that predict nearly identical power spectra. However, the...
The Impact of Secondary non-Gaussianities in the CMB on Cosmological Parameter Estimation (2009)
Smidt, Joseph, Joudaki, Shahab, Serra, Paolo, Amblard, Alexandre, Cooray, Asantha
We consider corrections to the cosmological parameters due to secondary contributions from weak gravitational lensing, the integrated Sachs-Wolfe effect, and the Sunyaev-Zel'dovich effect contained...
Calabrese, Erminia, Smidt, Joseph, Amblard, Alexandre, Cooray, Asantha, Melchiorri, Alessandro, Serra, Paolo, ...
We measure the skewness power spectrum of the Cosmic Microwave Background (CMB) anisotropies optimized for a detection of the secondary bispectrum generated by the correlation of the CMB lensing...
Smidt, Joseph, Amblard, Alexandre, Serra, Paolo, Cooray, Asantha
We constrain the primordial non-Gaussianity parameter of the local model f_{NL} using the skewness power spectrum associated with the two-to-one cumulant correlator of cosmic microwave background...
Cosmological Radiative Transfer Comparison Project II: The Radiation-Hydrodynamic Tests (2009)
Iliev, Ilian T., Whalen, Daniel, Mellema, Garrelt, Ahn, Kyungjin, Baek, Sunghye, Gnedin, Nickolay Y., ...
The development of radiation hydrodynamical methods that are able to follow gas dynamics and radiative transfer self-consistently is key to the solution of many problems in numerical astrophysics....
Photoionization of Clustered Halos by the First Stars (2007)
Whalen, Daniel, O'Shea, Brian W., Smidt, Joseph, Norman, Michael L.
We present numerical simulations of the photoevaporation of cosmological halos clustered around a 120 M$_\odot$ primordial star, confining our study to structures capable of hosting Population III...
How the First Stars Regulated Local Star Formation I: Radiative Feedback (2007)
Whalen, Daniel, O'Shea, Brian W., Smidt, Joseph, Norman, Michael L.
We present numerical simulations of how a 120 M$_\odot$ primordial star regulates star formation in nearby cosmological halos at $z \sim$ 20 by photoevaporation. Our models include nine-species...