منابع مشابه
PSR J1829+2456: a relativistic binary pulsar
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...
متن کاملTiming of the Binary Pulsar PSR B1259−63
Timing of PSR B1259−63, the first radio pulsar discovered to have a massive main-sequence companion, has been carried out since 1990. The timing is complicated because the orbital period is very long, the pulsar is eclipsed for 40 days around periastron, the pulsar has significant timing noise and also has been seen to glitch. A model for the timing data based on spin-orbit coupling no longer p...
متن کاملThe Binary Pulsar PSR 1908 + 00 in NGC 6760
We present orbital parameters of the 3.6ms binary pulsar 1908+00 in the globular cluster NGC 6760. The orbital period is 3.4 hr and the mass function is 3 10 6M , implying a minimum companion mass of 0.018M . The companion is probably degenerate; and if it is hydrogen, it is close to over owing its Roche lobe. The only other millisecond binary radio pulsar systems with orbital period < 10hr and...
متن کاملPsr J1518+4904: a Mildly Relativistic Binary Pulsar System
PSR J1518+4904 is a recently discovered 40.9 ms pulsar in an 8.6 day, moderately eccentric orbit. We have measured pulse arrival times for this pulsar over 1.4 yr at several radio frequencies, from which we have derived high precision rotational, astrometric, and orbital parameters. The upper limit for the period derivative of the pulsar, Ṗ < 4 × 10, gives a characteristic age of at least 1.6 ×...
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ژورنال
عنوان ژورنال: International Astronomical Union Colloquium
سال: 2000
ISSN: 0252-9211
DOI: 10.1017/s0252921100060498