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Publication Details
AFRICAN RESEARCH NEXUS
SHINING A SPOTLIGHT ON AFRICAN RESEARCH
earth and planetary sciences
The binary companion of young, relativistic pulsar J1906+0746
Astrophysical Journal, Volume 798, No. 2, Article 118, Year 2015
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Description
PSR J1906+0746 is a young pulsar in the relativistic binary with the second-shortest known orbital period, of 3.98 hr. We here present a timing study based on five years of observations, conducted with the five largest radio telescopes in the world, aimed at determining the companion nature. Through the measurement of three post-Keplerian orbital parameters, we find the pulsar mass to be 1.291(11) M ⊙, and the companion mass 1.322(11) M ⊙, respectively. These masses fit well in the observed collection of double neutron stars (DNSs), but are also compatible with other systems where a young pulsar such as J1906+0746 is orbited by a white dwarf (WD). Neither radio pulsations nor dispersion-inducing outflows that could have further established the companion nature were detected. We derive an H I-absorption distance, which indicates that an optical confirmation of a WD companion is very challenging. The pulsar is fading fast due to geodetic precession, limiting future timing improvements. We conclude that the young pulsar J1906+0746 is likely part of a DNS, or is otherwise orbited by an older WD, in an exotic system formed through two stages of mass transfer. © 2015. The American Astronomical Society. All rights reserved.
Authors & Co-Authors
van Leeuwen, Joeri
Netherlands, Dwingeloo
Netherlands Foundation for Research in Astronomy
Netherlands, Amsterdam
Universiteit Van Amsterdam
Stairs, Ingrid H.
Canada, Vancouver
The University of British Columbia
Lorimer, Duncan R.
United States, Morgantown
West Virginia University
Camilo, Fernando
United States, Arecibo
Arecibo Observatory
United States, New York
Columbia University
Chatterjee, S.
United States, Ithaca
Cornell University
Cognard, Ismaël
France, Orleans
Laboratoire de Physique et de Chimie de L'environnement et de L'espace Lpc2e
France, Nancay
Station de Radioastronomie de Nancay
Desvignes, Gregory
Germany, Bonn
Max Planck Institute for Radio Astronomy
Freire, Paulo C.C.
Germany, Bonn
Max Planck Institute for Radio Astronomy
Janssen, Gemma H.
Netherlands, Dwingeloo
Netherlands Foundation for Research in Astronomy
United Kingdom, Manchester
The University of Manchester
Kramer, Michael
Germany, Bonn
Max Planck Institute for Radio Astronomy
Lyne, Andrew G.
United Kingdom, Manchester
The University of Manchester
Nice, David J.
United States, Easton
Lafayette College
Ransom, Scott M.
United States, Charlottesville
National Radio Astronomy Observatory
Stappers, Benjamin W.
United Kingdom, Manchester
The University of Manchester
Statistics
Citations: 81
Authors: 14
Affiliations: 14
Identifiers
Doi:
10.1088/0004-637X/798/2/118
ISSN:
0004637X