Physics and Astronomy
Monthly Notices of the Royal Astronomical Society
pulsars, individual J1829+2456
We report the discovery of a new binary pulsar, PSR J1829+2456, found during a mid-latitude drift-scan survey with the Arecibo telescope. Our initial timing observations show the 41-ms pulsar to be in a 28-hr, slightly eccentric, binary orbit. The advance of periastron ˙ω = 0 .28 ± 0 .01 deg yr − 1 is derived from our timing observations spanning 200 days. Assuming that the advance of periastron is purely relativistic and a reasonable range of neutron star masses for PSR J1829+2456 we constrain the companion mass to be between 1.22 M ⊙ and 1.38 M ⊙, making it likely to be another neutron star. We also place a firm upper limit on the pulsar mass of 1.38 M ⊙. The expected coalescence time due to gravitational-wave emission is long ( ∼ 60 Gyr) and this system will not significantly impact upon calculations of merger rates that are relevant to upcoming instruments such as LIGO.
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Champion, D. J., D. R. Lorimer, M. A. McLaughlin, James M. Cordes, Zaven Arzoumanian, Joel M. Weisberg, and Joseph H. Taylor., "PSR J1829+2456: a relativistic binary pulsar". Monthly Notices of the Royal Astronomical Society, vol. 350, no. 4, 2004. [Online]. Accessed via Faculty Work. Physics and Astronomy. Carleton Digital Commons. Available: https://digitalcommons.carleton.edu/phys_faculty/1.