Giannantonio, Tommaso, Porciani, Cristiano
We study structure formation in the presence of primordial non-Gaussianity of the local type with parameters f_NL and g_NL. We show that the distribution of dark-matter halos is naturally described...
Valiviita, Jussi, Giannantonio, Tommaso
We present posterior likelihoods and Bayesian model selection analysis for generalized cosmological models where the primordial perturbations include correlated adiabatic and cold dark matter...
Giannantonio, Tommaso, Martinelli, Matteo, Silvestri, Alessandra, Melchiorri, Alessandro
We study the effects of modified theories of gravity on the cosmic microwave background (CMB) anisotropies power spectrum, and in particular on its large scales, where the integrated Sachs-Wolfe...
Measuring dark energy with the integrated Sachs-Wolfe effect (2008)
I present to this conference our latest measurements of the integrated Sachs-Wolfe (ISW) effect. After a brief review of the reasons for which this effect arises and of the technique to detect it by...
Detectability of a phantom-like braneworld model with the integrated Sachs-Wolfe effect (2008)
Giannantonio, Tommaso, Song, Yong-Seon, Koyama, Kazuya
We study a braneworld model in which a phantom-like behaviour occurs with only cold dark matter and a cosmological constant, due to a large distance modification of gravity. With the addition of...
Combined analysis of the integrated Sachs-Wolfe effect and cosmological implications (2008)
Giannantonio, Tommaso, Scranton, Ryan, Crittenden, Robert G., Nichol, Robert C., Boughn, Stephen P., Myers, Adam D., ...
We present a global measurement of the integrated Sachs-Wolfe (ISW) effect obtained by cross-correlating all relevant large scale galaxy data sets with the cosmic microwave background radiation map...
The effect of reionization on the CMB-density correlation (2007)
Giannantonio, Tommaso, Crittenden, Robert
In this paper we show how the rescattering of CMB photons after cosmic reionization can give a significant linear contribution to the temperature-matter cross-correlation measurements. These...
A high redshift detection of the integrated Sachs-Wolfe effect (2006)
Giannantonio, Tommaso, Crittenden, Robert G., Nichol, Robert C., Scranton, Ryan, Richards, Gordon T., Myers, Adam D., ...
We present evidence of a large angle correlation between the cosmic microwave background measured by WMAP and a catalog of photometrically detected quasars from the SDSS. The observed cross...
Chaplygin gas in light of recent Integrated Sachs--Wolfe effect data (2006)
Giannantonio, Tommaso, Melchiorri, Alessandro
We investigate the possibility of constraining Chaplygin dark energy models with current Integrated Sachs Wolfe effect data. In the case of a flat universe we found that generalized Chaplygin gas...