# Gravitational wave resonance in ultralight dark matter halos

### APA

Moreira Delgado, P. (2024). Gravitational wave resonance in ultralight dark matter halos. Perimeter Institute. https://pirsa.org/24010088

### MLA

Moreira Delgado, Paola. Gravitational wave resonance in ultralight dark matter halos. Perimeter Institute, Jan. 25, 2024, https://pirsa.org/24010088

### BibTex

@misc{ pirsa_PIRSA:24010088, doi = {10.48660/24010088}, url = {https://pirsa.org/24010088}, author = {Moreira Delgado, Paola}, keywords = {Cosmology}, language = {en}, title = {Gravitational wave resonance in ultralight dark matter halos}, publisher = {Perimeter Institute}, year = {2024}, month = {jan}, note = {PIRSA:24010088 see, \url{https://pirsa.org}} }

Paola Moreira Delgado Jagiellonian University

## Abstract

In this talk I will show how the gravitational potentials generated by ultralight dark matter halos interact with gravitational waves, resonantly amplifying them. Significant amplifications can be achieved in dense dark matter environments, where the Floquet exponent is increased. The frequency of the amplified gravitational wave is equal to the axion mass when one requires resonance in the first band. For some masses considered, the gravitational wave frequencies fall within the Pulsar Timing Array range, representing an interesting possibility to test ultralight axions as dark matter candidates.

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