A precise mass measurement of PSR J2045 + 3633

McKee, J. W.; Freire, P. C.C.; Berezina, M.; Champion, D. J.; Cognard, I.; Graikou, E.; Guillemot, L.; Keith, M. J.; Kramer, M.; Lyne, A. G.; Stappers, B. W.; Tauris, T. M.; Theureau, G.

Abstract

We present the results of a timing analysis undertaken with the goal of obtaining an improved mass measurement of the recycled pulsar J2045 + 3633. Using regular high-cadence observations with the Effelsberg, Nançay, and Lovell radio telescopes, together with targeted campaigns with the Arecibo Telescope and Effelsberg, we have assembled a 6-yr timing data set for this pulsar. We measure highly significant values for the proper motion and the related rate of change of orbital semimajor axis (x.), and have obtained high-precision values of the rate of advance of periastron time (ω.), and two of the Shapiro delay parameters (h3 and ς). This has allowed us to improve the measurements of the pulsar and companion masses by an order of magnitude, yielding (with 1σ uncertainties) 1.251+−00021021 M☉ for PSR J2045 + 3633, and 0.873+−00016014 M☉ for its white dwarf companion, and has allowed us to place improved constraints on the geometrical orientation of the binary system. Using our measurements of the binary component masses and the orbital size, we consider possible evolutionary scenarios for the system.

Citation

McKee, J. W., Freire, P. C., Berezina, M., Champion, D. J., Cognard, I., Graikou, E., Guillemot, L., Keith, M. J., Kramer, M., Lyne, A. G., Stappers, B. W., Tauris, T. M., & Theureau, G. (2020). A precise mass measurement of PSR J2045 + 3633. Monthly notices of the Royal Astronomical Society, 499(3), 4082-4096. https://doi.org/10.1093/mnras/staa2994

• Journal Article Type: Article
• Acceptance Date: Sep 25, 2020
• Online Publication Date: Oct 2, 2020
• Publication Date: 2020-12
• Deposit Date: Nov 29, 2022
• Publicly Available Date: Jan 9, 2023
• Journal: Monthly Notices of the Royal Astronomical Society
• Print ISSN: 0035-8711
• Electronic ISSN: 1365-2966
• Publisher: Oxford University Press
• Peer Reviewed: Peer Reviewed
• Volume: 499
• Issue: 3
• Pages: 4082-4096
• DOI: https://doi.org/10.1093/mnras/staa2994
• Public URL: https://hull-repository.worktribe.com/output/4134740