Events Daily

Wednesday, December 13, 2023

Gravitational wave signals of early universe dynamics
LianTao Wang, University of Chicago
Event Type: HEP Seminar
Time: 2:00 PM - 3:00 PM
Location: 726 Broadway, 940, CCPP Seminar
Abstract: Gravitational wave signals can reveal new information about the dynamics of the early universe and are complementary to other probes. I will use several examples to illustrate what kind of signal we should expect and what we can learn from them.

Link to the Event Video

Modelling the covariance for the galaxy clustering bispectrum
Jacopo Salvalaggio, University of Trieste
Event Type: Informal Astro Talk
Time: 2:00 PM - 3:00 PM
Location: 726 Broadway, 901, Sm Conf
Abstract: The galaxy clustering bispectrum, i.e. the Fourier transform of the 3-point correlation function of the galaxy density field, contains a large amount of information on the cosmology and can be used to greatly improve the constraints obtained from the 2-point function alone. However, providing a covariance matrix for it can be a challenging task as a great amount of simulations are needed in order to accurately estimate it numerically. In the presentation I'm going to show my latest results towards an analytical understanding of the bispectrum covariance, accounting for non-linear and window effects.