PSR J2322-2650 - a low-luminosity millisecond pulsar with a planetary-mass companion
MetadataShow full item record
We present the discovery of a binary millisecond pulsar (MSP), PSR J2322-2650, found in the southern section of the High Time Resolution Universe survey. This system contains a 3.5-ms pulsar with a ~10 -3 MâŠ™ companion in a 7.75-h circular orbit. Follow-up observations at the Parkes and Lovell telescopes have led to precise measurements of the astrometric and spin parameters, including the period derivative, timing parallax, and proper motion. PSR J2322-2650 has a parallax of 4.4 Â± 1.2 mas, and is thus at an inferred distance of 230 +90 -50 pc, making this system a candidate for optical studies. We have detected a source of R ~ 26.4 mag at the radio position in a single R-band observation with the Keck telescope, and this is consistent with the blackbody temperaturewewould expect from the companion if it fills its Roche lobe. The intrinsic period derivative of PSR J2322-2650 is among the lowest known, 4.4(4) Ã— 10 -22 s s -1 , implying a low surface magnetic field strength, 4.0(4) Ã— 10 7 G. Its mean radio flux density of 160 Î¼Jy combined with the distance implies that its radio luminosity is the lowest ever measured, 0.008(5) mJy kpc 2 . The inferred population of these systems in the Galaxy may be very significant, suggesting that this is a common MSP evolutionary path.
Showing items related by title, author, creator and subject.
The Age Distribution of Detrital Zircons in Quartzites from the Toodyay-Lake Grace Domain, Western Australia: Implications for the early Evolution of the Yilgarn CratonPidgeon, Robert; Wingate, Michael; Bodorkos, S.; Nelson, D. (2010)Evidence for the early history of the Archean Yilgarn Craton has been largely obliterated by the craton-wide emplacement of granitic rocks at c. 2650 Ma. However, detrital zircons from rare, c. 3.1 Ga quartz-rich metasediments ...
Geochronological and Stable Isotope Evidence for Widespread Orogenic Gold Mineralization from a Deep-Seated Fluid Source at ca 2.65 Ga in the Laverton Gold Province, Western AustraliaSalier, B.; Groves, D.; McNaughton, Neal; Fletcher, Ian (2005)Many gold deposits in the Laverton greenstone belt, in the northeast of the Eastern Goldfields province of the Yilgarn craton, are located adjacent to, or hosted by, granitoids. This has led to controversy over whether ...
Thermal History and Deep Overpressure Modelling in the Northern Carnarvon Basin, North West Shelf, AustraliaHe, Sheng (2002)The Northern Carnarvon Basin is the richest petroleum province in Australia. About 50 gas/condensate and oil fields, associated mainly with Jurassic source rocks, have been discovered in the sub-basins and on the Rankin ...