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arXiv · 2502.03155

Multimode ringdown modelling with $\texttt{qnmfits}$ and $\texttt{KerrRingdown}$

Lorena Magaña Zertuche·Leda Gao·Eliot Finch·Gregory B. Cook
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Abstract

In the last decade, the ringdown community has made large strides in understanding the aftermath of binary black hole mergers through the study of numerical simulations. In this note, we introduce two flavors of fitting algorithms, that have been verified against each other, for the extraction of quasinormal mode amplitudes from ringdown waveforms - $\texttt{qnmfits}$ in Python and $\texttt{KerrRingdown}$ in Mathematica.

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Lorena Magaña Zertuche, Leda Gao, Eliot Finch, Gregory B. Cook. 2025-02-05. Multimode ringdown modelling with $\texttt{qnmfits}$ and $\texttt{KerrRingdown}$. https://arxiv.org/abs/2502.03155

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