Статья

Transformation of a Star into a Planet in a Millisecond Pulsar Binary

M. BailesCentre for Astrophysics and Supercomputing and ARC Centre for All-Sky Astrophysics (CAASTRO), Swinburne University of Technology, Post Office Box 218 Hawthorn, VIC 3122, AustraliaS. D. BatesJodrell Bank Centre for Astrophysics, School of Physics and Astronomy, The University of Manchester, Manchester M13 9PL, UKV. BhaleraoCaltech Optical Observatories, California Institute of Technology, MS 249-17, Pasadena, CA 91125, USAN. D. R. BhatCentre for Astrophysics and Supercomputing and ARC Centre for All-Sky Astrophysics (CAASTRO), Swinburne University of Technology, Post Office Box 218 Hawthorn, VIC 3122, AustraliaM. BurgayIstituto Nazionale di Astrofisica–Osservatorio Astronomico di Cagliari, Poggio dei Pini, 09012 Capoterra, ItalySarah Burke-SpolaorAustralia Telescope National Facility, Commonwealth Scientific and Industrial Research Organisation (CSIRO) Astronomy and Space Science, Post Office Box 76, Epping NSW 1710, AustraliaN. D’AmicoDipartimento di Fisica, Università degli Studi di Cagliari, Cittadella Universitaria, 09042 Monserrato (CA), ItalyS. JohnstonAustralia Telescope National Facility, Commonwealth Scientific and Industrial Research Organisation (CSIRO) Astronomy and Space Science, Post Office Box 76, Epping NSW 1710, AustraliaM. J. KeithAustralia Telescope National Facility, Commonwealth Scientific and Industrial Research Organisation (CSIRO) Astronomy and Space Science, Post Office Box 76, Epping NSW 1710, AustraliaM. KrämerJodrell Bank Centre for Astrophysics, School of Physics and Astronomy, The University of Manchester, Manchester M13 9PL, UKS. R. KulkarniCaltech Optical Observatories, California Institute of Technology, MS 249-17, Pasadena, CA 91125, USAL. LevinAustralia Telescope National Facility, Commonwealth Scientific and Industrial Research Organisation (CSIRO) Astronomy and Space Science, Post Office Box 76, Epping NSW 1710, AustraliaA. G. LyneJodrell Bank Centre for Astrophysics, School of Physics and Astronomy, The University of Manchester, Manchester M13 9PL, UKS. MiliaDipartimento di Fisica, Università degli Studi di Cagliari, Cittadella Universitaria, 09042 Monserrato (CA), ItalyAndrea PossentiIstituto Nazionale di Astrofisica–Osservatorio Astronomico di Cagliari, Poggio dei Pini, 09012 Capoterra, ItalyLee R. SpitlerCentre for Astrophysics and Supercomputing and ARC Centre for All-Sky Astrophysics (CAASTRO), Swinburne University of Technology, Post Office Box 218 Hawthorn, VIC 3122, AustraliaB. W. StappersJodrell Bank Centre for Astrophysics, School of Physics and Astronomy, The University of Manchester, Manchester M13 9PL, UKW. van StratenCentre for Astrophysics and Supercomputing and ARC Centre for All-Sky Astrophysics (CAASTRO), Swinburne University of Technology, Post Office Box 218 Hawthorn, VIC 3122, Australia

2011en

ABI

Аннотация

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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Идентификаторы

DOI: 10.1126/science.1208890

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Цитирований: 2Использованных источников: 0

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