The geometric distance and binary orbit of PSR B1259-63
MetadataShow full item record
The pulsar/massive star binary system PSR B1259-63/LS 2883 is one of the best-studied gamma-ray binaries, a class of systems whose bright gamma-ray flaring can provide important insights into high-energy physics. Using the Australian Long Baseline Array, we have conducted very long baseline interferometric observations of PSR B1259-63 over 4.4 years, fully sampling the 3.4-year orbital period. From our measured parallax of 0.38 ± 0.05 maswe use a Bayesian approach to infer a distance of 2.6+0.4-0.3 kpc. We find that the binary orbit is viewed at an angle of 154 ± 3° to the line of sight, implying that the pulsar moves clockwise around its orbit as viewed on the sky. Taking our findings together with previous results from pulsar timing observations, all seven orbital elements for the system are now fully determined. We use our measurement of the inclination angle to constrain the mass of the stellar companion to lie in the range 15-31M?. Our measured distance and proper motion are consistent with the system having originated in the Cen OB1 association and receiving a modest natal kick, causing it to have moved ~8 pc from its birthplace over the past ~3 × 105 years. The orientation of the orbit on the plane of the sky matches the direction of motion of the X-ray synchrotron-emitting knot observed by the Chandra X-ray Observatory to be moving away from the system.
This article has been accepted for publication in Monthly Notices of the Royal Astronomical Society © 2018 The Author(s). Published by Oxford University Press on behalf of the Royal Astronomical Society. All rights reserved.
Showing items related by title, author, creator and subject.
The high time resolution universe pulsar survey - XII. Galactic plane acceleration search and the discovery of 60 pulsarsNg, C.; Champion, D.; Bailes, M.; Barr, E.; Bates, S.; Bhat, Ramesh; Burgay, M.; Burke-Spolaor, S.; Flynn, C.; Jameson, A.; Johnston, S.; Keith, M.; Kramer, M.; Levin, L.; Petroff, E.; Possenti, A.; Stappers, B.; Van Straten, W.; Tiburzi, C.; Eatough, R.; Lyne, A. (2015)© 2015 The Authors. We present initial results from the low-latitude Galactic plane region of the High Time Resolution Universe pulsar survey conducted at the Parkes 64-m radio telescope. We discuss the computational ...
A Multiwavelength View of the Neutron Star Binary 1FGL J1417.7-4402: A Progenitor to Canonical Millisecond PulsarsSwihart, S.; Strader, J.; Shishkovsky, L.; Chomiuk, L.; Bahramian, A.; Heinke, C.; Miller-Jones, James; Edwards, P.; Cheung, C. (2018)© 2018. The American Astronomical Society. All rights reserved.. The Fermi ?-ray source 1FGL J1417.7-4407 (J1417) is a compact X-ray binary with a neutron star primary and a red giant companion in a ~5.4 days orbit. This ...
Shannon, Ryan; Johnston, S.; Manchester, R. (2014)We present an analysis of 23 yr of pulse arrival times for PSR B1259−63. The pulsar is in a binary orbit about its approximately 20 M⊙ companion LS 2883. Our best-fitting timing solution has none of the pulse-number ...