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Title: The High Time Resolution Universe pulsar survey - X. Discovery of four millisecond pulsars and updated timing solutions of a further 12

Here, we report on the discovery of four millisecond pulsars (MSPs) in the High Time Resolution Universe (HTRU) pulsar survey being conducted at the Parkes 64 m radio telescope. All four MSPs are in binary systems and are likely to have white dwarf companions. Additionally, we present updated timing solutions for 12 previously published HTRU MSPs, revealing new observational parameters such as five proper motion measurements and significant temporal dispersion measure variations in PSR J1017-7156. We discuss the case of PSR J1801-3210, which shows no significant period derivative $$\dot{P}$$ after four years of timing data. Our best-fitting solution shows a $$\dot{P}$$ of the order of 10 -23, an extremely small number compared to that of a typical MSP. But, it is likely that the pulsar lies beyond the Galactic Centre, and an unremarkable intrinsic $$\dot{P}$$ is reduced to close to zero by the Galactic potential acceleration. Furthermore, we highlight the potential to employ PSR J1801-3210 in the strong equivalence principle test due to its wide and circular orbit. In a broader comparison with the known MSP population, we suggest a correlation between higher mass functions and the presence of eclipses in ‘very low mass binary pulsars’, implying that eclipses are observed in systems with high orbital inclinations. We also suggest that the distribution of the total mass of binary systems is inversely related to the Galactic height distribution. Finally, we report on the first detection of PSRs J1543-5149 and J1811-2404 as gamma-ray pulsars.
Authors:
 [1] ;  [2] ;  [3] ;  [4] ;  [5] ;  [6] ;  [1] ;  [7] ;  [8] ;  [8] ;  [9] ;  [3] ;  [10] ;  [5] ;  [11] ;  [2] ;  [12] ;  [13] ;  [11] ;  [1] more »;  [14] ;  [11] ;  [15] ;  [8] ;  [1] « less
  1. Max Planck Inst. for Radio Astronomy, Bonn (Germany)
  2. Swinburne Univ. of Technology, Hawthorn VIC (Australia). Centre for Astrophysics and Supercomputing and ARC Centre of Excellence for All-Sky Astrophysics (CAASTRO)
  3. West Virginia Univ., Morgantown, WV (United States). Dept. of Physics
  4. Swinburne Univ. of Technology, Hawthorn VIC (Australia). Centre for Astrophysics and Supercomputing and ARC Centre of Excellence for All-Sky Astrophysics (CAASTRO); Curtin Univ., Bentley, WA (Australia). International Centre for Radio Astronomy Research
  5. Astronomical Observatory of Cagliari (Italy)
  6. NASA Jet Propulsion Lab., Pasadena, CA (United States)
  7. Swinburne Univ. of Technology, Hawthorn VIC (Australia). Centre for Astrophysics and Supercomputing; Commonwealth Scientific and Industrial Research Organization (CSIRO) Astronomy and Space Science, Epping NSW (Australia)
  8. Commonwealth Scientific and Industrial Research Organization (CSIRO) Astronomy and Space Science, Epping NSW (Australia)
  9. Max Planck Inst. for Radio Astronomy, Bonn (Germany); Univ. of Manchester (United Kingdom). Jodrell Bank Centre for Astrophysics
  10. Swinburne Univ. of Technology, Hawthorn VIC (Australia). Centre for Astrophysics and Supercomputing and ARC Centre of Excellence for All-Sky Astrophysics (CAASTRO); Commonwealth Scientific and Industrial Research Organization (CSIRO) Astronomy and Space Science, Epping NSW (Australia)
  11. Univ. of Manchester (United Kingdom). Jodrell Bank Centre for Astrophysics
  12. Commonwealth Scientific and Industrial Research Organization (CSIRO) Astronomy and Space Science, Epping NSW (Australia); Univ. of Manchester (United Kingdom). Jodrell Bank Centre for Astrophysics
  13. Astronomical Observatory of Cagliari (Italy); Univ. of Cagliari (Italy). Dept. of Physics
  14. Max Planck Inst. for Radio Astronomy, Bonn (Germany); Univ. of Orleans (France). Lab. of Physics and Chemistry of Environment and Space
  15. Max Planck Inst. for Radio Astronomy, Bonn (Germany); Univ. of Bonn (Germany). Argelander Inst. for Astronomy
Publication Date:
Grant/Contract Number:
AC02-76SF00515
Type:
Accepted Manuscript
Journal Name:
Monthly Notices of the Royal Astronomical Society
Additional Journal Information:
Journal Volume: 439; Journal Issue: 2; Journal ID: ISSN 0035-8711
Publisher:
Royal Astronomical Society
Research Org:
SLAC National Accelerator Lab., Menlo Park, CA (United States)
Sponsoring Org:
USDOE
Contributing Orgs:
Fermi LAT Collaboration
Country of Publication:
United States
Language:
English
Subject:
79 ASTRONOMY AND ASTROPHYSICS; stars: neutron; pulsars: general; pulsars: individual: PSR J1017-7156; pulsars: individual: PSR J1543-5149; pulsars: individual: PSR J1801-3210; pulsars: individual: PSR J1811-2405
OSTI Identifier:
1356536

Ng, C., Bailes, M., Bates, S. D., Bhat, N. D. R., Burgay, M., Burke-Spolaor, S., Champion, D. J., Coster, P., Johnston, S., Keith, M. J., Kramer, M., Levin, L., Petroff, E., Possenti, A., Stappers, B. W., van Straten, W., Thornton, D., Tiburzi, C., Bassa, C. G., Freire, P. C. C., Guillemot, L., Lyne, A. G., Tauris, T. M., Shannon, R. M., and Wex, N.. The High Time Resolution Universe pulsar survey - X. Discovery of four millisecond pulsars and updated timing solutions of a further 12. United States: N. p., Web. doi:10.1093/mnras/stu067.
Ng, C., Bailes, M., Bates, S. D., Bhat, N. D. R., Burgay, M., Burke-Spolaor, S., Champion, D. J., Coster, P., Johnston, S., Keith, M. J., Kramer, M., Levin, L., Petroff, E., Possenti, A., Stappers, B. W., van Straten, W., Thornton, D., Tiburzi, C., Bassa, C. G., Freire, P. C. C., Guillemot, L., Lyne, A. G., Tauris, T. M., Shannon, R. M., & Wex, N.. The High Time Resolution Universe pulsar survey - X. Discovery of four millisecond pulsars and updated timing solutions of a further 12. United States. doi:10.1093/mnras/stu067.
Ng, C., Bailes, M., Bates, S. D., Bhat, N. D. R., Burgay, M., Burke-Spolaor, S., Champion, D. J., Coster, P., Johnston, S., Keith, M. J., Kramer, M., Levin, L., Petroff, E., Possenti, A., Stappers, B. W., van Straten, W., Thornton, D., Tiburzi, C., Bassa, C. G., Freire, P. C. C., Guillemot, L., Lyne, A. G., Tauris, T. M., Shannon, R. M., and Wex, N.. 2014. "The High Time Resolution Universe pulsar survey - X. Discovery of four millisecond pulsars and updated timing solutions of a further 12". United States. doi:10.1093/mnras/stu067. https://www.osti.gov/servlets/purl/1356536.
@article{osti_1356536,
title = {The High Time Resolution Universe pulsar survey - X. Discovery of four millisecond pulsars and updated timing solutions of a further 12},
author = {Ng, C. and Bailes, M. and Bates, S. D. and Bhat, N. D. R. and Burgay, M. and Burke-Spolaor, S. and Champion, D. J. and Coster, P. and Johnston, S. and Keith, M. J. and Kramer, M. and Levin, L. and Petroff, E. and Possenti, A. and Stappers, B. W. and van Straten, W. and Thornton, D. and Tiburzi, C. and Bassa, C. G. and Freire, P. C. C. and Guillemot, L. and Lyne, A. G. and Tauris, T. M. and Shannon, R. M. and Wex, N.},
abstractNote = {Here, we report on the discovery of four millisecond pulsars (MSPs) in the High Time Resolution Universe (HTRU) pulsar survey being conducted at the Parkes 64 m radio telescope. All four MSPs are in binary systems and are likely to have white dwarf companions. Additionally, we present updated timing solutions for 12 previously published HTRU MSPs, revealing new observational parameters such as five proper motion measurements and significant temporal dispersion measure variations in PSR J1017-7156. We discuss the case of PSR J1801-3210, which shows no significant period derivative $\dot{P}$ after four years of timing data. Our best-fitting solution shows a $\dot{P}$ of the order of 10-23, an extremely small number compared to that of a typical MSP. But, it is likely that the pulsar lies beyond the Galactic Centre, and an unremarkable intrinsic $\dot{P}$ is reduced to close to zero by the Galactic potential acceleration. Furthermore, we highlight the potential to employ PSR J1801-3210 in the strong equivalence principle test due to its wide and circular orbit. In a broader comparison with the known MSP population, we suggest a correlation between higher mass functions and the presence of eclipses in ‘very low mass binary pulsars’, implying that eclipses are observed in systems with high orbital inclinations. We also suggest that the distribution of the total mass of binary systems is inversely related to the Galactic height distribution. Finally, we report on the first detection of PSRs J1543-5149 and J1811-2404 as gamma-ray pulsars.},
doi = {10.1093/mnras/stu067},
journal = {Monthly Notices of the Royal Astronomical Society},
number = 2,
volume = 439,
place = {United States},
year = {2014},
month = {2}
}