Superdense beaming of axion dark matter in the vicinity of the light cylinder of pulsars
arXiv:2111.01746 · doi:10.1088/1475-7516/2022/08/026
Abstract
In this article we treat the non-adiabatic photon-to-axion resonant conversion of curvature radiation, synchrotron emission and inverse Compton scattering dominating the spectral density function of pulsars. First, we introduce emission models and benchmark observational data.vWe adopt a state-of-the-art density profile that relieves tension with the quantum electrodynamics vacuum polarization effect in highly magnetic stars, leading to efficient mixing. Then, we estimate the dark matter flux induced by photon-axion oscillation across the light cylinder of the neutron star. We find that pulsars might produce axion overdensities many orders of magnitude over the occupation number of dark matter in the Galactic halo within a broad parameter space. We point out possible new methods for axion detection derived from these results and other future lines of work.
15pp., 4 figs; as accepted for publication in JCAP
References in corpus (22)
- Magnetars: Properties, Origin and Evolution
- Polarization of the Crab pulsar and nebula as observed by the Integral/IBIS telescope
- The magnetar 1E 1547.0-5408: radio spectrum, polarimetry, and timing
- Green Bank and Effelsberg Radio Telescope Searches for Axion Dark Matter Conversion in Neutron Star Magnetospheres
- Optical polarisation of the Crab pulsar: precision measurements and comparison to the radio emission
- The Crab Pulsar at Centimeter Wavelengths II: Single Pulses
- Axion Stars and Fast Radio Bursts
- Theory of pulsar magnetosphere and wind
- Rapid Spectral Variability of a Giant Flare from a Magnetar in NGC 253
- Fast radio bursts from axion stars moving through pulsar magnetospheres
- Simultaneous multifrequency radio observations of the Galactic Centre magnetar SGR J1745-2900
- Probing Axions with Radiation from Magnetic Stars
- Pulsar radio emission mechanisms: a critique
- Axion-photon conversion in strongly magnetised plasmas
- A Search for Axionic Dark Matter Using the Magnetar PSR J1745-2900
- Radio Line Properties of Axion Dark Matter Conversion in Neutron Stars
- Axion Production in Pulsar Magnetosphere Gaps
- Spectral modelling of the high energy emission of the magnetar 4U 0142+614
- Giant Radio Pulses from the Crab Pulsar
- A dark matter telescope probing the 6 to 60 GHz band
- Photon-axion mixing in thermal emission of isolated neutron stars
- Axion-photon multimessenger astronomy with giant flares