Please use this identifier to cite or link to this item: http://hdl.handle.net/1959.3/240052

Title

A Shapiro delay detection in the binary system hosting the millisecond pulsar PSRJ1910-5959A

Author(s)

Corongiu, A.;  Burgay, M.;  Possenti, A.;  Camilo, F.;  D'Amico, N.;  Lyne, A. G.;  Manchester, R. N.;  Sarkissian, J. M.;  Bailes, M.;  Johnston, S.;  Kramer, M.;  van Straten, W.

Abstract

PSR J1910-5959A is a binary pulsar with a helium white dwarf (HeWD) companion located about 6 arcmin from the center of the globular cluster NGC 6752. Based on 12 years of observations at the Parkes radio telescope, the relativistic Shapiro delay has been detected in this system. We obtain a companion mass MC = 0.180 ± 0.018 M ☉ (1σ) implying that the pulsar mass lies in the range 1.1 M ☉ ≤ MP ≤ 1.5 M ☉. We compare our results with previous optical determinations of the companion mass and examine prospects for using this new measurement for calibrating the mass-radius relation for HeWDs and for investigating their evolution in a pulsar binary system. Finally, we examine the set of binary systems hosting a millisecond pulsar and a low-mass HeWD for which the mass of both stars has been measured. We confirm that the correlation between the companion mass and the orbital period predicted by Tauris & Savonije reproduces the observed values but find that the predicted MP -PB correlation overestimates the neutron star mass by about 0.5 M ☉ in the orbital period range covered by the observations. Moreover, a few systems do not obey the observed MP -PB correlation. We discuss these results in the framework of the mechanisms that inhibit the accretion of matter by a neutron star during its evolution in a low-mass X-ray binary.

Publication type

Journal article

Research centre

Swinburne University of Technology. Faculty of Information and Communication Technologies. Centre for Astrophysics and Supercomputing

Source

Astrophysical Journal, Vol. 760, no. 2 (Dec 2012), article no. 100

Publication year

2012

FOR Code(s)

0201 Astronomical and Space Sciences;  0305 Organic Chemistry;  0306 Physical Chemistry (Incl. Structural)

Keyword(s)

Globular clusters;  NGC 6752;  PSR J1910-5959A;  Pulsars

Publisher

Institute of Physics Publishing

ISSN

0004-637X

Publisher URL

http://dx.doi.org/10.1088/0004-637x/760/2/100

Copyright

Copyright © 2012 The American Astronomical Society. All rights reserved. The American Astronomical Society does not allow Swinburne Research Bank to archive either the accepted manuscript or the published version of the article. However you can find an earlier version of the full text here: http://arxiv.org/abs/1210.1167

Additional information

The authors acknowledge support from the y INAF, under the National Research Grant PRIN-INAF 2010, awarded with DP 28/2011.

Peer reviewed