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Title: THE DISTURBANCE OF A MILLISECOND PULSAR MAGNETOSPHERE

Abstract

Pulsar timing has enabled some of the strongest tests of fundamental physics. Central to the technique is the assumption that the detected radio pulses can be used to accurately measure the rotation of the pulsar. Here, we report on a broadband variation in the pulse profile of the millisecond pulsar J1643−1224. A new component of emission suddenly appears in the pulse profile, decays over four months, and results in a permanently modified pulse shape. Profile variations such as these may be the origin of timing noise observed in other millisecond pulsars. The sensitivity of pulsar-timing observations to gravitational radiation can be increased by accounting for this variability.

Authors:
; ; ; ; ; ;  [1];  [2]; ; ; ;  [3];  [4];  [5];  [6];  [7]; ;  [8];  [9];  [10] more »; « less
  1. CSIRO Astronomy and Space Science, Australia Telescope National Facility, Box 76, Epping, NSW 1710 (Australia)
  2. Astrophysics Group, Cavendish Laboratory, JJ Thomson Avenue, Cambridge CB3 0HE (United Kingdom)
  3. Centre for Astrophysics and Supercomputing, Swinburne University of Technology, P.O. Box 218, Hawthorn, VIC 3122 (Australia)
  4. International Centre for Radio Astronomy Research, Curtin University, Bentley, WA 6102 (Australia)
  5. Department of Electrical and Computer Engineering, University of California, San Diego, La Jolla, CA 92093 (United States)
  6. CSIRO Information Management and Technology, Box 225, Dickson, ACT 2602 (Australia)
  7. Jodrell Bank Centre for Astrophysics, University of Manchester, M13 9PL (United Kingdom)
  8. Monash Centre for Astrophysics, School of Physics and Astronomy, Monash University, VIC 3800 (Australia)
  9. Cahill Center for Astronomy and Astrophysics, California Institute of Technology, MC 249-17, Pasadena, CA 91125 (United States)
  10. Department of Physics, University of Wisconsin-Milwaukee, Box 413, Milwaukee, WI 53201 (United States)
Publication Date:
OSTI Identifier:
22654235
Resource Type:
Journal Article
Resource Relation:
Journal Name: Astrophysical Journal Letters; Journal Volume: 828; Journal Issue: 1; Other Information: Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
79 ASTROPHYSICS, COSMOLOGY AND ASTRONOMY; ACCOUNTING; DECAY; DISTURBANCES; EMISSION; GRAVITATIONAL RADIATION; PULSARS; PULSE SHAPERS; PULSES; ROTATION; SENSITIVITY; STARS

Citation Formats

Shannon, R. M., Kerr, M., Dai, S., Hobbs, G., Manchester, R. N., Reardon, D. J., Toomey, L., Lentati, L. T., Bailes, M., Osłowski, S., Rosado, P. A., Van Straten, W., Bhat, N. D. R., Coles, W. A., Dempsey, J., Keith, M. J., Lasky, P. D., Levin, Y., Ravi, V., Spiewak, R., E-mail: ryan.shannon@csiro.au, and and others. THE DISTURBANCE OF A MILLISECOND PULSAR MAGNETOSPHERE. United States: N. p., 2016. Web. doi:10.3847/2041-8205/828/1/L1.
Shannon, R. M., Kerr, M., Dai, S., Hobbs, G., Manchester, R. N., Reardon, D. J., Toomey, L., Lentati, L. T., Bailes, M., Osłowski, S., Rosado, P. A., Van Straten, W., Bhat, N. D. R., Coles, W. A., Dempsey, J., Keith, M. J., Lasky, P. D., Levin, Y., Ravi, V., Spiewak, R., E-mail: ryan.shannon@csiro.au, & and others. THE DISTURBANCE OF A MILLISECOND PULSAR MAGNETOSPHERE. United States. doi:10.3847/2041-8205/828/1/L1.
Shannon, R. M., Kerr, M., Dai, S., Hobbs, G., Manchester, R. N., Reardon, D. J., Toomey, L., Lentati, L. T., Bailes, M., Osłowski, S., Rosado, P. A., Van Straten, W., Bhat, N. D. R., Coles, W. A., Dempsey, J., Keith, M. J., Lasky, P. D., Levin, Y., Ravi, V., Spiewak, R., E-mail: ryan.shannon@csiro.au, and and others. Thu . "THE DISTURBANCE OF A MILLISECOND PULSAR MAGNETOSPHERE". United States. doi:10.3847/2041-8205/828/1/L1.
@article{osti_22654235,
title = {THE DISTURBANCE OF A MILLISECOND PULSAR MAGNETOSPHERE},
author = {Shannon, R. M. and Kerr, M. and Dai, S. and Hobbs, G. and Manchester, R. N. and Reardon, D. J. and Toomey, L. and Lentati, L. T. and Bailes, M. and Osłowski, S. and Rosado, P. A. and Van Straten, W. and Bhat, N. D. R. and Coles, W. A. and Dempsey, J. and Keith, M. J. and Lasky, P. D. and Levin, Y. and Ravi, V. and Spiewak, R., E-mail: ryan.shannon@csiro.au and and others},
abstractNote = {Pulsar timing has enabled some of the strongest tests of fundamental physics. Central to the technique is the assumption that the detected radio pulses can be used to accurately measure the rotation of the pulsar. Here, we report on a broadband variation in the pulse profile of the millisecond pulsar J1643−1224. A new component of emission suddenly appears in the pulse profile, decays over four months, and results in a permanently modified pulse shape. Profile variations such as these may be the origin of timing noise observed in other millisecond pulsars. The sensitivity of pulsar-timing observations to gravitational radiation can be increased by accounting for this variability.},
doi = {10.3847/2041-8205/828/1/L1},
journal = {Astrophysical Journal Letters},
number = 1,
volume = 828,
place = {United States},
year = {Thu Sep 01 00:00:00 EDT 2016},
month = {Thu Sep 01 00:00:00 EDT 2016}
}