Pulsars

Main meetings/events from April 2018 to July 2018

Spring is a favourite time for meetings in the Northern Hemisphere and the members of the SKA Pulsar Science Working Group (SKA-PSWG) have had a variety of opportunities to meet, share and discuss results, train students, and make long-term plans during this period. Among those, we list the following:

1) 22nd EPTA meeting

OPEN Norwich Building, Norwich, UK, April 18-20, 2018

The University of East Anglia in Norwich hosted the 22nd meeting of the members of the European Pulsar Timing Array (EPTA), a large fraction of whom are also members of the SKA-PSWG. Progress reports on the many ongoing projects, as well as the perspectives of the research on the way to SKA were discussed at large.

2) IPTA Science Meeting 2018

The Hotel Albuquerque, Albuquerque, New Mexico, USA, June 18–22, 2018

The International Pulsar Timing Array (IPTA) is a worldwide collaboration, currently composed of three regional consortia: EPTA in Europe, PPTA in Australia and NanoGRAV in North America. The primary aim is to achieve the detection of gravitational waves (GWs) at very low frequencies – around few nanoHertz – by exploiting regular timing observations of a large number of the most rapidly spinning pulsars. The annual science conference organized by the IPTA took place in New Mexico during the third week of June. In addition to many promising updates on the collaborative research in the field (including perspectives related to the future of the field in the SKA era), there were long sessions devoted to discussing the inclusion of new members and improving the cohesion of the IPTA organization.

Image: The official group picture of the 2018 IPTA Science Meeting in Albuquerque

3) Marcel Grossmann meeting XV

Università La Sapienza, Rome, Italy, July 01–07, 2018

A few hundred scientists (including significant representation by members of the SKA-PSWG) attended the Fifteenth Marcel Grossmann Meeting, focused on Recent Developments in Theoretical and Experimental General Relativity, Astrophysics and Relativistic Field Theories, which was hosted at “La Sapienza” University in Rome during the first week of July. In the context of the various topics discussed during the six days of the meeting, a special emphasis was given to some recent breakthroughs in which the contribution of radio astronomy has been relevant and for which there will be even more exciting perspectives made possible by the SKA. For instance the follow-ups of the GW170817 merger event and the new unprecedented constraints on the Strong Equivalence Principle set by the radio pulsar timing of the triple system. An evening public conference was organized specifically to report on the latter.

Publications related to the PSWG from April 2018 to July 2018

Over the past four months, the members of the PSWG have published 57 papers in international refereed journals, many reporting on research of direct relevance to the objectives of the PSWG, including the following:

  1. Arzoumanian et al., 2018, “The NANOGrav 11-year Data Set: High-precision Timing of 45 Millisecond Pulsars”, The Astrophysical Journal Supplement Series, 235, 37
  2. Arzoumanian et al., 2018, “The NANOGrav 11 Year Data Set: Pulsar-timing Constraints on the Stochastic Gravitational-wave Background”, The Astrophysical Journal, 859, 47
  3. Cameron et al., 2018, “The High Time Resolution Universe Pulsar Survey – XIII. PSR J1757-1854, the most accelerated binary pulsar”, Monthly Notices of the Royal Astronomical Society, 475, L57
  4. Freire & Ridolfi, 2018, “An algorithm for determining the rotation count of pulsars”, Monthly Notices of the Royal Astronomical Society, 476, 4794
  5. Lynch et al., 2018, “The Green Bank North Celestial Cap Pulsar Survey. III. 45 New Pulsar Timing Solutions”, The Astrophysical Journal, 859, 93
  6. Lam et al., 2018, “Optimal Frequency Ranges for Submicrosecond Precision Pulsar Timing”, The Astrophysical Journal, 861, 12
  7. Stappers et al., 2018, “The prospects of pulsar timing with new-generation radio telescopes and the Square Kilometre Array”, Philosophical Transactions of the Royal Society of London Series A, 376, 20170293
  8. Shaw, Stappers, & Weltevrede, 2018, “Resolving discrete pulsar spin-down states with current and future instrumentation”, Monthly Notices of the Royal Astronomical Society, 475, 5443
  9. Kawash et al., 2018, “The Green Bank Northern Celestial Cap Pulsar Survey. II. The Discovery and Timing of 10 Pulsars”, The Astrophysical Journal, 857, 131
  10. Camilo et al., 2018, “Revival of the Magnetar PSR J1622-4950: Observations with MeerKAT, Parkes, XMM-Newton, Swift, Chandra, and NuSTAR”, The Astrophysical Journal, 856, 180
  11. Iorio, 2018, “Perspectives on Constraining a Cosmological Constant-Type Parameter with Pulsar Timing in the Galactic Center”, Universe, 4, 59
  12. Tiburzi, 2018, “Pulsars Probe the Low-Frequency Gravitational Sky: Pulsar Timing Arrays Basics and Recent Results”, Publications of the Astronomical Society of Australia, 35, e013
  13. Tan et al., 2018, “Ensemble candidate classification for the LOTAAS pulsar survey”, Monthly Notices of the Royal Astronomical Society, 474, 4571
  14. Cadelano et al., 2018, “Discovery of Three New Millisecond Pulsars in Terzan 5”, The Astrophysical Journal, 855, 125
  15. Perera et al., 2018, “Improving timing sensitivity in the microhertz frequency regime: limits from PSR J1713+0747 on gravitational waves produced by supermassive black hole binaries”, Monthly Notices of the Royal Astronomical Society, 478, 218
  16. Verbiest & Shaifullah, 2018, “Measurement uncertainty in pulsar timing array experiments”, Classical and Quantum Gravity, 35, 133001
  17. Parent et al., 2018, “The Implementation of a Fast-folding Pipeline for Long-period Pulsar Searching in the PALFA Survey”, The Astrophysical Journal, 861, 44
  18. Shao, Wex & Kramer, 2018, “Testing the Universality of Free Fall towards Dark Matter with Radio Pulsars”, Physical Review Letters, 120, 241104
  19. Roshi et al., 2018, “Performance of a Highly Sensitive, 19-element, Dual-polarization, Cryogenic L-band Phased-array Feed on the Green Bank Telescope”, The Astronomical Journal, 155, 202
  20. Guo, Lee, & Caballero, 2018, “A dynamical approach in exploring the unknown mass in the Solar system using pulsar timing arrays”, Monthly Notices of the Royal Astronomical Society, 475, 3644

Report provided by the Pulsars SWG