Cosmic analogs of the stern-gerlach experiment and the detection of light bosons

Doron Chelouche, Eduardo I. Guendelman

Research output: Contribution to journalArticlepeer-review


We show that, by studying the arrival times of radio pulses from highly magnetized pulsars, it may be possible to detect light spin-0 bosons (such as axions and axion-like particles) with a much greater sensitivity, over a broad particle mass range than is currently reachable by terrestrial experiments and indirect astrophysical bounds. In particular, we study the effect of splitting of photon-boson beams under intense magnetic field gradients in magnetars and show that radio pulses (at meter wavelengths) may be split and shift by a discernible phase down to a photon-boson coupling constant of g ∼ 10 -14 GeV-1; i.e., about 4 orders of magnitude lower than current upper limits on g. The effect increases linearly with photon wavelength with split pulses having equal fluxes and similar polarizations. These properties make the identification of beam-splitting and beam deflection effects straightforward with currently available data. Better understanding of radio emission from magnetars is, however, required to confidently exclude regions in the parameter space when such effects are not observed.

Original languageEnglish
Pages (from-to)L5-L8
JournalAstrophysical Journal
Issue number1 PART 2
StatePublished - 2009
Externally publishedYes


  • Elementary particles
  • Magnetic fields
  • Pulsars: general

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science


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