PSR J1909-3744: A Binary Millisecond Pulsar with a Very Small Duty Cycle
نویسندگان
چکیده
منابع مشابه
PSR J1909−3744, a Binary Millisecond Pulsar with a Very Small Duty Cycle
We report the discovery of PSR J1909−3744, a 2.95 millisecond pulsar in a nearly circular 1.53 day orbit. Its narrow pulse width of 43 μs allows pulse arrival times to be determined with great accuracy. We have spectroscopically identified the companion as a moderately hot (T ≈ 8500K) white dwarf with strong absorption lines. Radial velocity measurements of the companion will yield the mass rat...
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In this paper we try to dynamically constrain the quadrupole mass moment Q of the binary millisecond pulsar PSR J1909-3744, which has a white dwarf as companion, from deviations of the third Kepler law. By determining the pulsar’s mass mp from the general relativistic expression of the phenomenologically determined post-Keplerian parameter s, we get Q = (−0.1 ± 1.3) × 10 kg m which is compatibl...
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We report on nearly two years of timing observations of the low-mass binary millisecond pulsar, PSR J1909−3744 with the Caltech-Parkes-Swinburne Recorder II (CPSR2), a new instrument that gives unprecedented timing precision. Daily observations give a weighted rms residual of 74 ns, indicating an extremely low level of systematic error. We have greatly improved upon the previous parallax and pr...
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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 ω̇ = 0.28 ± 0.01 deg yr is derived from our timing observations spanning 200 days. Assuming that the advance of periastron is pu...
متن کاملIs PSR B1757-24 a binary pulsar?
Binary pulsars with very small radial velocity corresponds to weak orbital effect at time scale of orbital period, and thus be treated as singular ones. However such pulsars may show their binary nature at long time scale by affecting pulsar frequency derivatives. Subtracting the magnetic dipole radiation predicted frequency derivatives from the measured ones, the intensity of long term orbital...
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ژورنال
عنوان ژورنال: The Astrophysical Journal
سال: 2003
ISSN: 0004-637X,1538-4357
DOI: 10.1086/381260