PIRSA:22020069

Axion echos from supernovae remnants

Fan, J. (2022). Axion echos from supernovae remnants. Perimeter Institute. https://pirsa.org/22020069

Fan, JiJi. Axion echos from supernovae remnants. Perimeter Institute, Feb. 22, 2022, https://pirsa.org/22020069 

          @misc{ pirsa_PIRSA:22020069,
            doi = {10.48660/22020069},
            url = {https://pirsa.org/22020069},
            author = {Fan, JiJi},
            keywords = {Particle Physics},
            language = {en},
            title = {Axion echos from supernovae remnants},
            publisher = {Perimeter Institute},
            year = {2022},
            month = {feb},
            note = {PIRSA:22020069 see, \url{https://pirsa.org}}
          }

JiJi Fan Brown University

DOI 10.48660/22020069
Collection
Talk Type Scientific Series
Subject

Abstract

Stimulated decays of axion dark matter, triggered by a source in the sky, could produce a photon flux along the continuation of the line of sight, pointing backward to the source. The strength of this so-called axion “echo” signal depends on the entire history of the source and could still be strong from sources that are dim today but had a large flux density in the past, such as supernova remnants (SNRs). This echo signal turns out to be most observable in the radio band. I will present the sensitivity of radio telescopes such as the Square Kilometer Array (SKA) to echo signals generated by SNRs that have already been observed. In addition, I will show projections of the detection reach for signals from newly born supernovae that could be detected in the future. Intriguingly, an observable echo signal could come from old “ghost” SNRs which were very bright in the past but are now so dim that they haven’t been observed.  

Zoom Link: https://pitp.zoom.us/j/91076203387?pwd=UzNva3N4Zi9mV3BkMlJvUnhtRXRZdz09