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  PALFA Discovery of a Highly Relativistic Double Neutron Star Binary

Stovall, K., Freire, P. C. C., Chatterjee, S., Demorest, P. B., Lorimer, D. R., McLaughlin, M. A., et al. (2018). PALFA Discovery of a Highly Relativistic Double Neutron Star Binary. Astrophysical Journal, Letters, 854: L22. doi:10.3847/2041-8213/aaad06.

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Item Permalink: http://hdl.handle.net/21.11116/0000-0000-771E-A Version Permalink: http://hdl.handle.net/21.11116/0000-0002-FA2F-1
Genre: Journal Article

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 Creators:
Stovall, K., Author
Freire, P. C. C., Author
Chatterjee, S., Author
Demorest, P. B., Author
Lorimer, D. R., Author
McLaughlin, M. A., Author
Pol, N., Author
van Leeuwen, J., Author
Wharton, R. S., Author
Allen, B.1, Author              
Boyce, M., Author
Brazier, A., Author
Caballero, K., Author
Camilo, F., Author
Camuccio, R., Author
Cordes, J. M., Author
Crawford, F., Author
Deneva, J. S., Author
Ferdman, R. D., Author
Hessels, J. W. T., Author
Jenet, F. A., AuthorKaspi, V. M., AuthorKnispel, B.1, Author              Lazarus, P., AuthorLynch, R., AuthorParent, E., AuthorPatel, C., AuthorPleunis, Z., AuthorRansom, S. M., AuthorScholz, P., AuthorSeymour, A., AuthorSiemens, X., AuthorStairs, I. H., AuthorSwiggum, J., 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 the discovery and initial follow-up of a double neutron star (DNS) system, PSR J1946$+$2052, with the Arecibo L-Band Feed Array pulsar (PALFA) survey. PSR J1946$+$2052 is a 17-ms pulsar in a 1.88-hour, eccentric ($e \, =\, 0.06$) orbit with a $\gtrsim 1.2 \, M_\odot$ companion. We have used the Jansky Very Large Array to localize PSR J1946$+$2052 to a precision of 0.09 arcseconds using a new phase binning mode. We have searched multiwavelength catalogs for coincident sources but did not find any counterparts. The improved position enabled a measurement of the spin period derivative of the pulsar ($\dot{P} \, = \, 9\,\pm \, 2 \,\times 10^{-19}$); the small inferred magnetic field strength at the surface ($B_S \, = \, 4 \, \times \, 10^9 \, \rm G$) indicates that this pulsar has been recycled. This and the orbital eccentricity lead to the conclusion that PSR J1946$+$2052 is in a DNS system. Among all known radio pulsars in DNS systems, PSR J1946$+$2052 has the shortest orbital period and the shortest estimated merger timescale, 46 Myr; at that time it will display the largest spin effects on gravitational wave waveforms of any such system discovered to date. We have measured the advance of periastron passage for this system, $\dot{\omega} \, = \, 25.6 \, \pm \, 0.3\, \deg \rm yr^{-1}$, implying a total system mass of only 2.50 $\pm$ 0.04 $M_\odot$, so it is among the lowest mass DNS systems. This total mass measurement combined with the minimum companion mass constrains the pulsar mass to $\lesssim 1.3 \, M_\odot$.

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 Dates: 2018-02-052018
 Publication Status: Published in print
 Pages: -
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 Table of Contents: -
 Rev. Method: -
 Identifiers: arXiv: 1802.01707
URI: http://arxiv.org/abs/1802.01707
DOI: 10.3847/2041-8213/aaad06
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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: 854 Sequence Number: L22 Start / End Page: - Identifier: ISSN: 0004-637X
CoNE: /journals/resource/954922828215_1