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Gravitational Wave Astronomy Prospectives for Core-Collapse Supernovae Populations

Presentation #115.29 in the session Multi-Messenger Astrophysics.

Published onJul 01, 2023
Gravitational Wave Astronomy Prospectives for Core-Collapse Supernovae Populations

We present an updated estimate of the intrinsic core collapse supernovae (CCSNe) rate within 20 Mpc from Earth. We find a cumulative rate of a few CCSNe per year within this volume. This shows promise for potential detections made by next generation gravitational-wave (GW) detectors - such as Einstein Telescope and Cosmic Explorer. Our rate estimate takes into account properties of individual galaxies located within this volume and minimizes major observational biases. We also provide our cumulative rate as a function of distance and identify most probable regions where potential GW signals from CCSNe may originate. This also allows us to evaluate the number of CCSNe candidate events needed for population detection methodologies. We compare the current standard single CCSN detection methodology to two collective detection methodologies: the Feldman-Cousins counting method and the local probability method used for GW searches associated with gamma-ray bursts. We provide examples of potential sensitivity improvements with respect to the current detection approaches. Specifically, we show that the 50% distance detection range of the CCSN GW population is larger than that for a single CCSN GW candidate.

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