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PSR J1024–0719: A Millisecond Pulsar in an Unusual Long-period Orbit

Kaplan, David L. and Kupfer, Thomas and Prince, Tom A. (2016) PSR J1024–0719: A Millisecond Pulsar in an Unusual Long-period Orbit. Astrophysical Journal, 826 (1). Art. No. 86. ISSN 0004-637X.

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PSR J1024–0719 is a millisecond pulsar that was long thought to be isolated. However, puzzling results concerning its velocity, distance, and low rotational period derivative have led to a reexamination of its properties. We present updated radio timing observations along with new and archival optical data which show that PSR J1024–0719 is most likely in a long-period (2–20 kyr) binary system with a low-mass (≈0.4 M⊙), low-metallicity (z ≈ -0.9 dex) main-sequence star. Such a system can explain most of the anomalous properties of this pulsar. We suggest that this system formed through a dynamical exchange in a globular cluster that ejected it into a halo orbit, which is consistent with the low observed metallicity for the stellar companion. Further astrometric and radio timing observations such as measurement of the third period derivative could strongly constrain the range of orbital parameters.

Item Type:Article
Related URLs:
URLURL TypeDescription Paper
Kaplan, David L.0000-0001-6295-2881
Kupfer, Thomas0000-0002-6540-1484
Prince, Tom A.0000-0002-8850-3627
Additional Information:© 2016 The American Astronomical Society. Received 2016 March 31; accepted 2016 May 10; published 2016 July 25. We thank J. Creighton, C. Bassa, and S. Phinney for useful discussions. The NANOGrav project receives support from National Science Foundation (NSF) PIRE program award number 0968296 and NSF Physics Frontiers Center award number 1430284. P.S.R.'s work at NRL is supported by the Chief of Naval Research. Pulsar research at UBC is supported by an NSERC Discovery Grant and by the Canadian Institute for Advanced Research. A.A.M. acknowledges support for this work by NASA from a Hubble Fellowship grant: HST-HF-51325.01, awarded by STScI, operated by AURA, Inc., for NASA, under contract NAS 5-26555. Part of the research was carried out at the Jet Propulsion Laboratory, California Institute of Technology, under a contract with NASA. The National Radio Astronomy Observatory is a facility of the National Science Foundation operated under cooperative agreement by Associated Universities, Inc. Facilities: GBT - Green Bank Telescope, PO:1.5m - Palomar Observatory's 1.5 meter Telescope, Hale (Double Beam Spectrograph) - , VLT:Antu (FORS1) - .
Group:Palomar Transient Factory
Funding AgencyGrant Number
Chief of Naval ResearchUNSPECIFIED
Natural Sciences and Engineering Research Council of Canada (NSERC)UNSPECIFIED
Canadian Institute for Advanced Research (CIFAR)UNSPECIFIED
NASA Hubble FellowshipHST-HF-51325.01
NASANAS 5-26555
Subject Keywords:binaries: general – pulsars: individual (PSR J1024–0719) – stars: distances
Issue or Number:1
Record Number:CaltechAUTHORS:20160916-150307252
Persistent URL:
Official Citation:David L. Kaplan et al 2016 ApJ 826 86
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:70407
Deposited By: Tony Diaz
Deposited On:19 Sep 2016 15:08
Last Modified:22 Nov 2019 19:12

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