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Strong, Variable Circular Polarization in PKS 1519-273

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Sources and Scintillations

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Abstract

We find strong (> 1%) circular polarization in the intraday-variable radio source PKS1519-273. The source exhibits ~ 12 hourly variability in all four Stokes parameters at 4.8 and8.6 GHz, and longer timescale variability at 2.5 and 1.4 GHz. The characteristics and frequencydependence of the variability suggest that it is due to interstellar scintillation. VSOP limits on thedistance to the scattering screen constrain the brightness temperature to T B > 5 x 1013 K. Thefluctuations in total intensity are well-correlated with those in circular polarization, implying that thevariable component of the source is -3.8 ± 0.4% circularly polarized at 4.8 GHz. The origin of thecircular polarization is unclear.

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References

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Author information

Authors and Affiliations

  1. RCfTA, School of Physics, University of Sydney, Australia

    Jean-Pierre Macquart

  2. Australia Telescope National Facility/Anglo-Australian Observatory, Australia

    Lucyna Kedziora-Chudczer

  3. Australia Telescope National Facility, CSIRO, Australia

    David Jauncey

  4. Australia Telescope National Facility/University of Tasmania, Australia

    David Rayner

Authors
  1. Jean-Pierre Macquart
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  2. Lucyna Kedziora-Chudczer
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  3. David Jauncey
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  4. David Rayner
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Editor information

Editors and Affiliations

  1. ASTRON, Dwingeloo and University of Amsterdam, The Netherlands

    R. Strom

  2. Beijing Astronomical Observatory, National Astronomical Observatories, Chinese Academy of Sciences, China

    P. Bo

  3. Research Centre for Theoretical Astrophysics, University of Sydney Australia Telescope National Facility, CSIRO, Australia

    M. Walker

  4. Beijing Astronomical Observatory, National Astronomical Observatories, Chinese Academy of Sciences, China

    N. Rendong

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© 2001 Springer Science+Business Media Dordrecht

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Macquart, JP., Kedziora-Chudczer, L., Jauncey, D., Rayner, D. (2001). Strong, Variable Circular Polarization in PKS 1519-273. In: Strom, R., Bo, P., Walker, M., Rendong, N. (eds) Sources and Scintillations. Springer, Dordrecht. https://doi.org/10.1007/978-94-010-1001-6_25

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  • DOI: https://doi.org/10.1007/978-94-010-1001-6_25

  • Publisher Name: Springer, Dordrecht

  • Print ISBN: 978-94-010-3879-9

  • Online ISBN: 978-94-010-1001-6

  • eBook Packages: Springer Book Archive

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