%0 Journal Article %1 Verde2000 %A Verde, Licia %A Jimenez, Raul %A Kamionkowski, Marc %A Matarrese, Sabino %D 2000 %K cosmology non-gaussian %T Tests for primordial non-Gaussianity %U http://arxiv.org/abs/astro-ph/0011180 %X We investigate the relative sensitivities of several tests for deviations from Gaussianity in the primordial distribution of density perturbations. We consider models for non-Gaussianity that mimic that which comes from inflation as well as that which comes from topological defects. The tests we consider involve the cosmic microwave background (CMB), large-scale structure (LSS), high-redshift galaxies, and the abundances and properties of clusters. We find that the CMB is superior at finding non-Gaussianity in the primordial gravitational potential (as inflation would produce), while observations of high-redshift galaxies are much better suited to find non-Gaussianity that resembles that expected from topological defects. We derive a simple expression that relates the abundance of high-redshift objects in non-Gaussian models to the primordial skewness.

@article{Verde2000, abstract = { We investigate the relative sensitivities of several tests for deviations from Gaussianity in the primordial distribution of density perturbations. We consider models for non-Gaussianity that mimic that which comes from inflation as well as that which comes from topological defects. The tests we consider involve the cosmic microwave background (CMB), large-scale structure (LSS), high-redshift galaxies, and the abundances and properties of clusters. We find that the CMB is superior at finding non-Gaussianity in the primordial gravitational potential (as inflation would produce), while observations of high-redshift galaxies are much better suited to find non-Gaussianity that resembles that expected from topological defects. We derive a simple expression that relates the abundance of high-redshift objects in non-Gaussian models to the primordial skewness. }, added-at = {2009-08-11T09:27:12.000+0200}, author = {Verde, Licia and Jimenez, Raul and Kamionkowski, Marc and Matarrese, Sabino}, biburl = {https://www.bibsonomy.org/bibtex/285ae125c07d4e5d505edebcaae98ef99/jpschaar}, description = {Tests for primordial non-Gaussianity}, interhash = {57be02a65e32cbaac4d74d574c413ce5}, intrahash = {85ae125c07d4e5d505edebcaae98ef99}, keywords = {cosmology non-gaussian}, note = {cite arxiv:astro-ph/0011180 Comment: 6 pages, 2 figures, MNRAS in press (minor changes to match the accepted version)}, timestamp = {2009-08-11T09:27:12.000+0200}, title = {Tests for primordial non-Gaussianity}, url = {http://arxiv.org/abs/astro-ph/0011180}, year = 2000 }