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Synchronous X-ray and Radio Mode Switches: a Rapid Global Transformation of the Pulsar Magnetosphere

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arxiv 1302.0203 v1 pith:A3KAEGC5 submitted 2013-02-01 astro-ph.HE

W. Hermsen (1 , 2) , J.W.T. Hessels (3 , L. Kuiper (1) , J. van Leeuwen (3 , D. Mitra (4) , J. de Plaa (1) , J. M. Rankin (5
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B.W. Stappers (6) G.A.E. Wright (7) LOFAR's pulsar builders group ((1) SRON Netherlands Institute for Space Research (2) Astronomical Institute Anton Pannekoek University of Amsterdam (3) Astron the Netherlands Institute for Radio Astronomy (4) National Centre for Radio Astrophysics (NCFRA-TIFR) (5) Physics Department University of Vermont (6) Jodrell Bank Center for Astrophysics School of Physics Astronomy (7) Astronomy Centre University of Sussex)
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keywords radioemissionmodepulsarcomponentmagnetospherex-raychanges
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Pulsars emit low-frequency radio waves through to high-energy gamma-rays that are generated anywhere from the surface out to the edges of the magnetosphere. Detecting correlated mode changes in the multi-wavelength emission is therefore key to understanding the physical relationship between these emission sites. Through simultaneous observations, we have detected synchronous switching in the radio and X-ray emission properties of PSR B0943+10. When the pulsar is in a sustained radio 'bright' mode, the X-rays show only an un-pulsed, non-thermal component. Conversely, when the pulsar is in a radio 'quiet' mode, the X-ray luminosity more than doubles and a 100%-pulsed thermal component is observed along with the non-thermal component. This indicates rapid, global changes to the conditions in the magnetosphere, which challenge all proposed pulsar emission theories.

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