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Mode changing in the Black Widow Pulsar

  • Nikhil Mahajan (a1) and Marten van Kerkwijk (a1)

Abstract

Mode changing is a phenomenon where a pulsar’s emission abruptly changes between two or more quasi-stable modes. We have discovered mode changing in the Black Widow Pulsar (PSR B1957+20), a first detection of mode changing in a millisecond pulsar. On average, a mode change occurs every 1.7 seconds. Multiple components across the pulse profile participate in the mode changing, indicating that this is likely caused by a global change in the pulsar’s magnetosphere.

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References

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Backer, D. C., 1970, Nature, 228, 1297
Cordes, J. M., 2013, ApJ, 775, 47
Main, R., van Kerkwijk, M., Pen, U.-L., Mahajan, N., & Vanderlinde, K., 2017, ApJ (Letters), 840, L15
Timokhin, A. N., 2010, MNRAS, 408, L41
Wang, N., Manchester, R. N., & Johnston, S., 2007, MNRAS, 377, 1383
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Mode changing in the Black Widow Pulsar

  • Nikhil Mahajan (a1) and Marten van Kerkwijk (a1)

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