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Title:
A Radio Pulsar Spinning at 716 Hz
Authors:
Hessels, Jason W. T.; Ransom, Scott M.; Stairs, Ingrid H.; Freire, Paulo C. C.; Kaspi, Victoria M.; Camilo, Fernando
Affiliation:
AA(Department of Physics, McGill University, Montreal, QC H3A 2T8, Canada.), AB(National Radio Astronomy Observatory (NRAO), 520 Edgemont Road, Charlottesville, VA 22903, USA.), AC(Department of Physics and Astronomy, University of British Columbia, 6224 Agricultural Road, Vancouver, BC V6T 1Z1, Canada.), AD(National Astronomy and Ionosphere Center, Arecibo Observatory, HC03 Box 53995, PR 00612, USA.), AE(Department of Physics, McGill University, Montreal, QC H3A 2T8, Canada.), AF(Columbia Astrophysics Laboratory, Columbia University, 550 West 120th Street, New York, NY 10027, USA.)
Publication:
Science, Volume 311, Issue 5769, pp. 1901-1904 (2006).
Publication Date:
03/2006
Category:
ASTRONOMY
Origin:
SCIENCE
Abstract Copyright:
(c) 2006: Science
DOI:
10.1126/science.1123430
Bibliographic Code:
2006Sci...311.1901H

Abstract

We have discovered a 716-hertz eclipsing binary radio pulsar in the globular cluster Terzan 5 using the Green Bank Telescope. It is the fastest spinning neutron star found to date, breaking the 24-year record held by the 642-hertz pulsar B1937+21. The difficulty in detecting this pulsar, because of its very low flux density and high eclipse fraction (~40% of the orbit), suggests that even faster spinning neutron stars exist. If the pulsar has a mass less than twice the mass of the Sun, then its radius must be constrained by the spin rate to be <16 kilometers. The short period of this pulsar also constrains models that suggest that gravitational radiation, through an r-mode (Rossby wave) instability, limits the maximum spin frequency of neutron stars.
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