1. The High Time Resolution Universe Pulsar Survey - XIII. PSR J1757-1854, the most accelerated binary pulsar
- Author
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Thomas M. Tauris, Michael Kramer, Paulo C. C. Freire, Duncan R. Lorimer, Caterina Tiburzi, A. D. Cameron, Matthew Bailes, Andrew Jameson, Benjamin Stappers, N. D. R. Bhat, Michael Keith, Lina Levin, Cherry Ng, Ramesh Karuppusamy, Ralph Eatough, Ewan Barr, Norbert Wex, Shivani Bhandari, Simon Johnston, Chris Flynn, D. J. Champion, Maura McLaughlin, A. Possenti, W. van Straten, C. G. Bassa, E. Petroff, Alessandro Ridolfi, M. Burgay, Sarah Burke-Spolaor, and Andrew Lyne
- Subjects
astro-ph.SR ,Astrophysics::High Energy Astrophysical Phenomena ,Pulsar planet ,FOS: Physical sciences ,Astrophysics ,General Relativity and Quantum Cosmology (gr-qc) ,01 natural sciences ,Binary pulsar ,General Relativity and Quantum Cosmology ,Gravitation ,Pulsar ,surveys ,Millisecond pulsar ,Tests of general relativity ,0103 physical sciences ,010306 general physics ,010303 astronomy & astrophysics ,Solar and Stellar Astrophysics (astro-ph.SR) ,Physics ,High Energy Astrophysical Phenomena (astro-ph.HE) ,astro-ph.HE ,binaries: close ,pulsars: individual: PSR ,Astronomy ,Astronomy and Astrophysics ,J1757-1854 ,Neutron star ,Astrophysics - Solar and Stellar Astrophysics ,Space and Planetary Science ,gravitation ,Astrophysics::Earth and Planetary Astrophysics ,Relativistic quantum chemistry ,Astrophysics - High Energy Astrophysical Phenomena - Abstract
We report the discovery of PSR J1757$-$1854, a 21.5-ms pulsar in a highly-eccentric, 4.4-h orbit around a neutron star (NS) companion. PSR J1757$-$1854 exhibits some of the most extreme relativistic parameters of any known pulsar, including the strongest relativistic effects due to gravitational-wave (GW) damping, with a merger time of 76 Myr. Following a 1.6-yr timing campaign, we have measured five post-Keplerian (PK) parameters, yielding the two component masses ($m_\text{p}=1.3384(9)\,\text{M}_\odot$ and $m_\text{c}=1.3946(9)\,\text{M}_\odot$) plus three tests of general relativity (GR), which the theory passes. The larger mass of the NS companion provides important clues regarding the binary formation of PSR J1757$-$1854. With simulations suggesting 3-$\sigma$ measurements of both the contribution of Lense-Thirring precession to the rate of change of the semi-major axis and the relativistic deformation of the orbit within $\sim7-9$ years, PSR J1757$-$1854 stands out as a unique laboratory for new tests of gravitational theories., Comment: 6 pages, 2 figures, 2 tables
- Published
- 2017