2018MNRAS.475L..57C

Query : 2018MNRAS.475L..57C

2018MNRAS.475L..57C - Mon. Not. R. Astron. Soc., 475, L57-L61 (2018)

The High Time Resolution Universe Pulsar Survey - XIII. PSR J1757-1854, the most accelerated binary pulsar.

CAMERON A.D., CHAMPION D.J., KRAMER M., BAILES M., BARR E.D., BASSA C.G., BHANDARI S., BHAT N.D.R., BURGAY M., BURKE-SPOLAOR S., EATOUGH R.P., FLYNN C.M.L., FREIRE P.C.C., JAMESON A., JOHNSTON S., KARUPPUSAMY R., KEITH M.J., LEVIN L., LORIMER D.R., LYNE A.G., McLAUGHLIN M.A., NG C., PETROFF E., POSSENTI A., RIDOLFI A., STAPPERS B.W., VAN STRATEN W., TAURIS T.M., TIBURZI C. and WEX N.

Abstract (from CDS):

We report the discovery of PSR J1757-1854, a 21.5-ms pulsar in a highly-eccentric, 4.4-h orbit with 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 damping, with a merger time of 76 Myr. Following a 1.6-yr timing campaign, we have measured five post-Keplerian parameters, yielding the two component masses (mp = 1.3384(9) M☉ and mc = 1.3946(9) M☉) plus three tests of general relativity, 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-σ measurements of both the contribution of Lense-Thirring precession to the rate of change of the semimajor axis and the relativistic deformation of the orbit within ∼7-9 yr, PSR J1757-1854 stands out as a unique laboratory for new tests of gravitational theories.

Abstract Copyright: © 2018 The Author(s) Published by Oxford University Press on behalf of the Royal Astronomical Society

Journal keyword(s): gravitation - surveys - binaries: close - pulsars: individual: PSR J1757-1854

Simbad objects: 6

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Number of rows : 6
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 PSR J0737-3039 Psr 07 37 51.248 -30 39 40.83           ~ 445 1
2 PSR B1534+11 Psr 15 37 09.9603 +11 55 55.554           ~ 453 1
3 PSR J1738+0333 Psr 17 38 53.966386 +03 33 10.87200           ~ 191 1
4 PSR J1757-1854 Psr 17 57 03.78438 -18 54 03.3760           ~ 67 0
5 PSR J1915+1606 Psr 19 15 27.99999 +16 06 27.4034     22.5     ~ 1032 1
6 PSR J2129+1209C Psr 21 30 01.2030 +12 10 38.159           ~ 215 2

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