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Publication Details
AFRICAN RESEARCH NEXUS
SHINING A SPOTLIGHT ON AFRICAN RESEARCH
earth and planetary sciences
Arecibo pulsar survey using alfa. ii. the young, highly relativistic binary pulsar J1906+0746
Astrophysical Journal, Volume 640, No. 1 I, Year 2006
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Description
We report the discovery of PSR J1906+0746, a young 144 ms pulsar in a highly relativistic 3.98 hr orbit with an eccentricity of 0.085 and expected gravitational wave coalescence time of ∼300 Myr. The new pulsar was found during precursor survey observations with the Arecibo 1.4 GHz feed array system and retrospectively detected in the Parkes Multibeam plane pulsar survey data. From radio follow-up observations with Arecibo, Jodrell Bank, Green Bank, and Parkes, we have measured the spin-down and binary parameters of the pulsar and its basic spectral and polarization properties. We also present evidence for pulse profile evolution, which is likely due to geodetic precession, a relativistic effect caused by the misalignment of the pulsar spin and total angular momentum vectors. Our measurements show that PSR J1906+0746 is a young object with a characteristic age of 112 kyr. From the measured rate of orbital periastron advance (7°.57 ± 0°.03 yr-1), we infer a total system mass of 2.61 ± 0.02 M⊙. While these parameters suggest that the PSR J1906+0746 binary system might be a younger version of the double pulsar system, intensive searches for radio pulses from the companion have so far been unsuccessful. It is therefore not known whether the companion is another neutron star or a massive white dwarf. Regardless of the nature of the companion, a simple calculation suggests that the Galactic birthrate of binaries similar to PSR J1906+0746 is ∼60 Myr-1. This implies that PSR J1906+0746 will make a significant contribution to the computed cosmic inspiral rate of compact binary systems. © 2006. The American Astronomical Society. All rights reserved.
Authors & Co-Authors
Lorimer, Duncan R.
United Kingdom, Manchester
The University of Manchester
Stairs, Ingrid H.
Canada, Vancouver
The University of British Columbia
Freire, Paulo C.C.
Puerto Rico, Arecibo
National Astronomy and Ionosphere Center Arecibo Observatory
Cordes, James M.
United States, Ithaca
Cornell University
Camilo, Fernando
United States, New York
Columbia University
Faulkner, Andrew J.
United Kingdom, Manchester
The University of Manchester
Lyne, Andrew G.
United Kingdom, Manchester
The University of Manchester
Nice, David J.
United States, Bryn Mawr
Bryn Mawr College
Ransom, Scott M.
United States, Charlottesville
National Radio Astronomy Observatory
Arzoumanian, Zaven
United States, Columbia
Universities Space Research Association
Manchester, Richard N.
Australia, Canberra
Commonwealth Scientific and Industrial Research Organisation
Champion, David J.
United Kingdom, Manchester
The University of Manchester
van Leeuwen, Joeri
Canada, Vancouver
The University of British Columbia
McLaughlin, Maura Ann
United Kingdom, Manchester
The University of Manchester
Hessels, Jason W.T.
Canada, Montreal
Université Mcgill
Vlemmings, Wouter H.T.
United Kingdom, Manchester
The University of Manchester
Deshpande, Avinash A.
Puerto Rico, Arecibo
National Astronomy and Ionosphere Center Arecibo Observatory
Bhat, N. D. R.
Australia, Hawthorn
Swinburne University of Technology
Chatterjee, S.
United States, Charlottesville
National Radio Astronomy Observatory
United States, Cambridge
Harvard-smithsonian Center for Astrophysics
Han, Jinlin
China, Beijing
Chinese Academy of Sciences
Gaensler, B. M.
United States, Cambridge
Harvard-smithsonian Center for Astrophysics
Deneva, Julia S.
United States, Ithaca
Cornell University
Reid, Beth Ann
United States, Princeton
Princeton University
Lazio, T. Joseph W.
United States, Washington, D.c.
U.s. Naval Research Laboratory
Kaspi, Victoria M.
Canada, Montreal
Université Mcgill
Crawford, Fronefield M.
United States, Haverford
Haverford College
Lommen, Andrea N.
United States, Lancaster
Franklin and Marshall College, Lancaster
Backer, Donald C.
United States, Berkeley
University of California, Berkeley
Kramer, Michael
United Kingdom, Manchester
The University of Manchester
Stappers, Benjamin W.
Netherlands, Dwingeloo
Netherlands Foundation for Research in Astronomy
Netherlands, Amsterdam
Universiteit Van Amsterdam
Hobbs, George B.
Australia, Canberra
Commonwealth Scientific and Industrial Research Organisation
Possenti, Andrea
Italy, Rome
Istituto Nazionale Di Astrofisica, Rome
D'Amico, Nicolò D.
Italy, Rome
Istituto Nazionale Di Astrofisica, Rome
Burgay, Marta
Italy, Rome
Istituto Nazionale Di Astrofisica, Rome
Statistics
Citations: 112
Authors: 34
Affiliations: 21
Identifiers
Doi:
10.1086/499918
ISSN:
0004637X
Study Design
Cross Sectional Study
Cohort Study
Study Approach
Quantitative