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  Einstein@Home discovery of a Double Neutron Star Binary in the PALFA Survey

Lazarus, P., Freire, P. C. C., Allen, B., Aulbert, C., Bock, O., Bogdanov, S., et al. (2016). Einstein@Home discovery of a Double Neutron Star Binary in the PALFA Survey. Astrophysical Journal, Letters, 831(2): 150. doi:10.3847/0004-637X/831/2/150.

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Item Permalink: http://hdl.handle.net/11858/00-001M-0000-002C-3E36-C Version Permalink: http://hdl.handle.net/21.11116/0000-0002-F665-7
Genre: Journal Article

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 Creators:
Lazarus, P., Author
Freire, P. C. C., Author
Allen, B.1, Author              
Aulbert, C.1, Author              
Bock, O.1, Author              
Bogdanov, S., Author
Brazier, A., Author
Camilo, F., Author
Cardoso, F., Author
Chatterjee, S., Author
Cordes, J. M., Author
Crawford, F., Author
Deneva, J. S., Author
Eggenstein, H.-B.1, Author
Fehrmann, H.1, Author              
Ferdman, R., Author
Hessels, J. W. T., Author
Jenet, F. A., Author
Karako-Argaman, C., Author
Kaspi, V. M., Author
Knispel, B.1, Author              Lynch, R., Authorvan Leeuwen, J., AuthorMachenschalk, B.1, Author              Madsen, E., AuthorMcLaughlin, M. A., AuthorPatel, C., AuthorRansom, S. M., AuthorScholz, P., AuthorSeymour, A., AuthorSiemens, X., AuthorSpitler, L. G., AuthorStairs, I. H., AuthorStovall, K., AuthorSwiggum, J., AuthorVenkataraman, A., AuthorZhu, W. W., Author more..
Affiliations:
1Observational Relativity and Cosmology, AEI-Hannover, MPI for Gravitational Physics, Max Planck Society, ou_24011              

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Free keywords: Astrophysics, High Energy Astrophysical Phenomena, astro-ph.HE
 Abstract: We report here the Einstein@Home discovery of PSR J1913+1102, a 27.3-ms pulsar found in data from the ongoing Arecibo PALFA pulsar survey. The pulsar is in a 4.95-hr double neutron star (DNS) system with an eccentricity of 0.089. From radio timing with the Arecibo 305-m telescope, we measure the rate of advance of periastron to be 5.632(18) deg/yr. Assuming general relativity accurately models the orbital motion, this corresponds to a total system mass of 2.875(14) solar masses, similar to the mass of the most massive DNS known to date, B1913+16, but with a much smaller eccentricity. The small eccentricity indicates that the second-formed neutron star (the companion of PSR J1913+1102) was born in a supernova with a very small associated kick and mass loss. In that case this companion is likely, by analogy with other systems, to be a light (1.2 solar mass) neutron star; the system would then be highly asymmetric. A search for radio pulsations from the companion yielded no plausible detections, so we can't yet confirm this mass asymmetry. By the end of 2016, timing observations should permit the detection of two additional post-Keplerian parameters: the Einstein delay, which will enable precise mass measurements and a verification of the possible mass asymmetry of the system, and the orbital decay due to the emission of gravitational waves, which will allow another test of the radiative properties of gravity. The latter effect will cause the system to coalesce in ~0.5 Gyr.

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 Dates: 2016-08-292016-08-312016
 Publication Status: Published in print
 Pages: 20 pages in referee format, 3 figures, 2 tables, Accepted for publication in the Astrophysical Journal
 Publishing info: -
 Table of Contents: -
 Rev. Method: -
 Identifiers: arXiv: 1608.08211
DOI: 10.3847/0004-637X/831/2/150
URI: http://arxiv.org/abs/1608.08211
 Degree: -

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Title: Astrophysical Journal, Letters
  Other : ApJL
Source Genre: Journal
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Publ. Info: Chicago, IL : University of Chicago Press for the American Astronomical Society
Pages: - Volume / Issue: 831 (2) Sequence Number: 150 Start / End Page: - Identifier: ISSN: 0004-637X
CoNE: /journals/resource/954922828215_1