Lawrence Berkeley National Laboratory

Physics Division

4D Seminar

Monday, June 07, 2020


ZOOM TALK https://lbnl.zoom.us/j/215429094

12:30 PM

Anirudh Prabu (Stanford)

“Axion Production in Pulsar Magnetosphere Gaps”



Abstract:


Pulsar magnetospheres admit non-stationary vacuum gaps that are characterized by non-vanishing E⋅B. The vacuum gaps play an important role in plasma production and electromagnetic wave emission. We show that these gaps generate axions whose energy is set by the gap oscillation frequency. The density of axions produced in a gap can be several orders of magnitude greater than the ambient dark matter density. In the strong pulsar magnetic field, a fraction of these axions may convert to photons, giving rise to broadband radio signals. We show that dedicated observations of nearby pulsars with radio telescopes (FAST) and interferometers (SKA) can probe axion-photon couplings that are a few orders of magnitude lower than current astrophysical bounds.

──────────
Join Zoom Meeting
https://lbnl.zoom.us/j/215429094

Meeting ID: 215 429 094

One tap mobile
+16699006833,,215429094# US (San Jose)
+13462487799,,215429094# US (Houston)

Dial by your location
        +1 669 900 6833 US (San Jose)
        +1 346 248 7799 US (Houston)
        +1 312 626 6799 US (Chicago)
        +1 646 558 8656 US (New York)
        +1 253 215 8782 US
        +1 301 715 8592 US
Meeting ID: 215 429 094
Find your local number: https://lbnl.zoom.us/u/acBxMxIpwT

Join by SIP
215429094@zoomcrc.com

Join by H.323
162.255.37.11 (US West)
162.255.36.11 (US East)
221.122.88.195 (China)
115.114.131.7 (India Mumbai)
115.114.115.7 (India Hyderabad)
213.19.144.110 (EMEA)
103.122.166.55 (Australia)
209.9.211.110 (Hong Kong)
64.211.144.160 (Brazil)
69.174.57.160 (Canada)
207.226.132.110 (Japan)
Meeting ID: 215 429 094

──────────