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Title:
Transformation of a Star into a Planet in a Millisecond Pulsar Binary
Authors:
Bailes, M.; Bates, S. D.; Bhalerao, V.; Bhat, N. D. R.; Burgay, M.; Burke-Spolaor, S.; D'Amico, N.; Johnston, S.; Keith, M. J.; Kramer, M.; Kulkarni, S. R.; Levin, L.; Lyne, A. G.; Milia, S.; Possenti, A.; Spitler, L.; Stappers, B.; van Straten, W.
Affiliation:
AA(Centre for Astrophysics and Supercomputing and ARC Centre for All-Sky Astrophysics (CAASTRO), Swinburne University of Technology, Post Office Box 218 Hawthorn, VIC 3122, Australia.; Department of Astronomy, University of California, Berkeley, CA 94720, USA), AB(Jodrell Bank Centre for Astrophysics, School of Physics and Astronomy, The University of Manchester, Manchester M13 9PL, UK), AC(Caltech Optical Observatories, California Institute of Technology, MS 249-17, Pasadena, CA 91125, USA), AD(Centre for Astrophysics and Supercomputing and ARC Centre for All-Sky Astrophysics (CAASTRO), Swinburne University of Technology, Post Office Box 218 Hawthorn, VIC 3122, Australia), AE(Istituto Nazionale di Astrofisica--Osservatorio Astronomico di Cagliari, Poggio dei Pini, 09012 Capoterra, Italy), AF(Australia Telescope National Facility, Commonwealth Scientific and Industrial Research Organisation (CSIRO) Astronomy and Space Science, Post Office Box 76, Epping NSW 1710, Australia), AG(Istituto Nazionale di Astrofisica--Osservatorio Astronomico di Cagliari, Poggio dei Pini, 09012 Capoterra, Italy.; Dipartimento di Fisica, Università degli Studi di Cagliari, Cittadella Universitaria, 09042 Monserrato (CA), Italy), AH(Australia Telescope National Facility, Commonwealth Scientific and Industrial Research Organisation (CSIRO) Astronomy and Space Science, Post Office Box 76, Epping NSW 1710, Australia), AI(Australia Telescope National Facility, Commonwealth Scientific and Industrial Research Organisation (CSIRO) Astronomy and Space Science, Post Office Box 76, Epping NSW 1710, Australia), AJ(Max-Planck Institut für Radioastronomie, Auf dem Huegel 69, 53121 Bonn, Germany.; Jodrell Bank Centre for Astrophysics, School of Physics and Astronomy, The University of Manchester, Manchester M13 9PL, UK), AK(Caltech Optical Observatories, California Institute of Technology, MS 249-17, Pasadena, CA 91125, USA), AL(Centre for Astrophysics and Supercomputing and ARC Centre for All-Sky Astrophysics (CAASTRO), Swinburne University of Technology, Post Office Box 218 Hawthorn, VIC 3122, Australia.; Australia Telescope National Facility, Commonwealth Scientific and Industrial Research Organisation (CSIRO) Astronomy and Space Science, Post Office Box 76, Epping NSW 1710, Australia), AM(Jodrell Bank Centre for Astrophysics, School of Physics and Astronomy, The University of Manchester, Manchester M13 9PL, UK), AN(Dipartimento di Fisica, Università degli Studi di Cagliari, Cittadella Universitaria, 09042 Monserrato (CA), Italy.; Istituto Nazionale di Astrofisica--Osservatorio Astronomico di Cagliari, Poggio dei Pini, 09012 Capoterra, Italy), AO(Istituto Nazionale di Astrofisica--Osservatorio Astronomico di Cagliari, Poggio dei Pini, 09012 Capoterra, Italy), AP(Centre for Astrophysics and Supercomputing and ARC Centre for All-Sky Astrophysics (CAASTRO), Swinburne University of Technology, Post Office Box 218 Hawthorn, VIC 3122, Australia), AQ(Jodrell Bank Centre for Astrophysics, School of Physics and Astronomy, The University of Manchester, Manchester M13 9PL, UK), AR(Centre for Astrophysics and Supercomputing and ARC Centre for All-Sky Astrophysics (CAASTRO), Swinburne University of Technology, Post Office Box 218 Hawthorn, VIC 3122, Australia)
Publication:
Science, Volume 333, Issue 6050, pp. 1717- (2011). (Sci Homepage)
Publication Date:
09/2011
Category:
ASTRONOMY
Origin:
SCIENCE
Abstract Copyright:
(c) 2011: Science
DOI:
10.1126/science.1208890
Bibliographic Code:
2011Sci...333.1717B

Abstract

Millisecond pulsars are thought to be neutron stars that have been spun-up by accretion of matter from a binary companion. Although most are in binary systems, some 30% are solitary, and their origin is therefore mysterious. PSR J1719-1438, a 5.7-millisecond pulsar, was detected in a recent survey with the Parkes 64-meter radio telescope. We show that this pulsar is in a binary system with an orbital period of 2.2 hours. The mass of its companion is near that of Jupiter, but its minimum density of 23 grams per cubic centimeter suggests that it may be an ultralow-mass carbon white dwarf. This system may thus have once been an ultracompact low-mass x-ray binary, where the companion narrowly avoided complete destruction.
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