PIRSA:24040114

Video URL

https://pirsa.org/24040114

CHIME is secretly an axion experiment - VIRTUAL

Schutz, K. (2024). CHIME is secretly an axion experiment - VIRTUAL. Perimeter Institute for Theoretical Physics. https://pirsa.org/24040114

Schutz, Katelin. CHIME is secretly an axion experiment - VIRTUAL. Perimeter Institute for Theoretical Physics, Apr. 23, 2024, https://pirsa.org/24040114 

          @misc{ scivideos_PIRSA:24040114,
            doi = {10.48660/24040114},
            url = {https://pirsa.org/24040114},
            author = {Schutz, Katelin},
            keywords = {Particle Physics},
            language = {en},
            title = {CHIME is secretly an axion experiment - VIRTUAL},
            publisher = {Perimeter Institute for Theoretical Physics},
            year = {2024},
            month = {apr},
            note = {PIRSA:24040114 see, \url{https://scivideos.org/pirsa/24040114}}
          }

Katelin Schutz McGill University

Talk numberPIRSA:24040114
DOI10.48660/24040114
Source RepositoryPIRSA
Collection
Talk Type Scientific Series
Subject

Abstract

In the presence of radiation from bright astrophysical sources at radio frequencies, axion dark matter can undergo stimulated decay to two nearly back-to-back photons, meaning that bright sources could have faint counterimages in other parts of the sky. The counterimages will be spectrally distinct from backgrounds, taking the form of a narrow radio line centered at half the axion mass with a spectral width determined by Doppler broadening in the dark matter halo. In essence, axions behave as an imperfect monochromatic mirror. The morphology of the induced images can be nontrivial, with blurring due to the geometry of the source and image as well as spatial smearing due to the galactic kinematics of axion dark matter. I will show that the axion decay-induced counterimages of galactic sources may be bright enough to be detectable with archival data from CHIME and other ongoing or planned radio surveys. CHIME therefore can run as a competitive axion experiment simultaneously with other science objectives, requiring no new hardware.

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