SMuK 2023 – scientific programme

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GR: Fachverband Gravitation und Relativitätstheorie

GR 2: Cosmology I

GR 2.1: Talk

Monday, March 20, 2023, 16:30–16:50, ZEU/0255

Anisotropies in the Cosmological Gravitational Wave Background — •Florian Schulze — Max-Planck-Institut für Kernphysik, Heidelberg, Germany

The cosmological stochastic gravitational wave background (CGWB) is expected to be detected by future gravitational wave (GW) interferometers. A map of angular fluctuations in the CGWB provides an independent measurement of cosmological parameters, similar to the cosmic microwave background (CMB). Furthermore, it contains information about the cosmological model and a multitude of possible CGWB sources, such as inflation, primordial black holes or phase transitions in the early universe.

In this presentation, I will discuss anisotropies in the CGWB and introduce CLASS_GW, an extension of the Cosmological Linear Anisotropy Solving System (CLASS) to calculate CGWB anisotropies. Using CLASS_GW, I present forecasts for future GW experiments, showing their capabilities of testing the early universe physics and the cosmological model.