Arecibo PALFA survey and Einstein@Home: Binary pulsar discovery by volunteer computing
MetadataShow full item record
We report the discovery of the 20.7ms binary pulsar J1952+2630, made using the distributed computing project Einstein@Home in Pulsar ALFA survey observations with the Arecibo telescope. Follow-up observations with the Arecibo telescope confirm the binary nature of the system. We obtain a circular orbital solution with an orbital period of 9.4hr, a projected orbital radius of 2.8lt-s, and a mass function of f = 0.15 M ? by analysis of spin period measurements. No evidence of orbital eccentricity is apparent; we set a 2s upper limit e ? 1.7 × 10 -3 . The orbital parameters suggest a massive white dwarf companion with a minimum mass of 0.95 M ? , assuming a pulsar mass of 1.4 M ? . Most likely, this pulsar belongs to the rare class of intermediate-mass binary pulsars. Future timing observations will aim to determine the parameters of this system further, measure relativistic effects, and elucidate the nature of the companion star. © 2011. The American Astronomical Society. All rights reserved.
Showing items related by title, author, creator and subject.
Shannon, Ryan; Johnston, S.; Manchester, R. (2014)We present an analysis of 23 yr of pulse arrival times for PSR B1259−63. The pulsar is in a binary orbit about its approximately 20 M⊙ companion LS 2883. Our best-fitting timing solution has none of the pulse-number ...
Binary supermassive black hole environments diminish the gravitational wave signal in the pulsar timing bandRavi, V.; Wyithe, J.; Shannon, Ryan; Hobbs, G.; Manchester, R. (2014)We assess the effects of supermassive black hole (SMBH) environments on the gravitational wave (GW) signal from binary SMBHs. To date, searches with pulsar timing arrays for GWs from binary SMBHs, in the frequency band ...
The High Time Resolution Universe survey - XI. Discovery of five recycled pulsars and the optical detectability of survey white dwarf companionsBates, S.; Thornton, D.; Bailes, M.; Barr, E.; Bassa, C.; Bhat, Ramesh; Burgay, M.; Burke-Spolaor, S.; Champion, D.; Flynn, C.; Jameson, A.; Johnston, S.; Keith, M.; Kramer, M.; Levin, L.; Lyne, A.; Milia, S.; Ng, C.; Petroff, E.; Possenti, A.; Stappers, B.; van Straten, W.; Tiburzi, C. (2015)We present the discovery of a further five recycled pulsar systems in the mid-Galactic latitude portion of the High Time Resolution Universe survey. The pulsars have rotational periods ranging from 2 to 66 ms, and four ...