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  Arecibo PALFA Survey and Einstein@Home: Binary Pulsar Discovery by Volunteer Computing

Knispel, B., Lazarus, P., Allen, B., Anderson, D., Aulbert, C., Bhat, N. D. R., et al. (2011). Arecibo PALFA Survey and Einstein@Home: Binary Pulsar Discovery by Volunteer Computing. The Astrophysical Journal Letters, 732(1): L1. doi:10.1088/2041-8205/732/1/L1.

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 Creators:
Knispel, B.1, Author           
Lazarus, P., Author
Allen, B.1, Author           
Anderson, D., Author
Aulbert, C.1, Author           
Bhat, N. D. R., Author
Bock, O., Author
Bogdanov, S., Author
Brazier, A., Author
Camilo, F., Author
Chatterjee, S., Author
Cordes, J. M., Author
Crawford, F., Author
Deneva, J. S., Author
Desvignes, G., Author
Fehrmann, H., Author
Freire, P. C. C., Author
Hammer, D., Author
Hessels, J. W. T., Author
Jenet, F. A., Author
Kaspi, V. M., AuthorKramer, M., Authorvan Leeuwen, J., AuthorLorimer, D. R., AuthorLyne, A. G., AuthorMachenschalk, B.1, Author           McLaughlin, M. A., AuthorMessenger, C.1, Author           Nice, D. J., AuthorPapa, M. A.2, Author           Pletsch, H. J.1, Author           Prix, R.1, Author           Ransom, S. M., AuthorSiemens, X., AuthorStairs, I. H., AuthorStappers, B. W., AuthorStovall, K., AuthorVenkataraman, A., Author more..
Affiliations:
1Observational Relativity and Cosmology, AEI-Hannover, MPI for Gravitational Physics, Max Planck Society, ou_24011              
2Astrophysical and Cosmological Relativity, AEI-Golm, MPI for Gravitational Physics, Max Planck Society, ou_1933290              

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Free keywords: Astrophysics, Galaxy Astrophysics, astro-ph.GA
 Abstract: We report the discovery of the 20.7 ms 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 9.4 hr, a projected orbital radius
of 2.8 lt-s, and a mass function of f = 0.15 solar masses by analysis of spin
period measurements. No evidence of orbital eccentricity is apparent; we set a
2-sigma upper limit e < 1.7e-3. The orbital parameters suggest a massive white
dwarf companion with a minimum mass of 0.95 solar masses, assuming a pulsar
mass of 1.4 solar masses. 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.

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 Dates: 2011-02-252011-04-072011
 Publication Status: Published in print
 Pages: 5 pages, 3 figures, 1 table; updated to published version
 Publishing info: -
 Table of Contents: -
 Rev. Type: -
 Degree: -

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Title: The Astrophysical Journal Letters
Source Genre: Journal
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Pages: - Volume / Issue: 732 (1) Sequence Number: L1 Start / End Page: - Identifier: -