A millisecond pulsar in a stellar triple system

doi:10.1038/nature12917

. 2014 Jan 23;505(7484):520-4.

doi: 10.1038/nature12917. Epub 2014 Jan 5.

A millisecond pulsar in a stellar triple system

S M Ransom¹, I H Stairs², A M Archibald³, J W T Hessels⁴, D L Kaplan⁵, M H van Kerkwijk⁶, J Boyles⁷, A T Deller⁸, S Chatterjee⁹, A Schechtman-Rook¹⁰, A Berndsen², R S Lynch¹¹, D R Lorimer¹², C Karako-Argaman¹¹, V M Kaspi¹¹, V I Kondratiev¹³, M A McLaughlin¹², J van Leeuwen⁴, R Rosen¹⁴, M S E Roberts¹⁵, K Stovall¹⁶

Affiliations

¹ National Radio Astronomy Observatory, 520 Edgemont Road, Charlottesville, Virginia 22903-2475, USA.
² Department of Physics and Astronomy, University of British Columbia, 6224 Agricultural Road, Vancouver, British Columbia V6T 1Z1, Canada.
³ 1] Netherlands Institute for Radio Astronomy (ASTRON), Postbus 2, 7990 AA Dwingeloo, The Netherlands [2] Department of Physics, McGill University, 3600 University Street, Montreal, Quebec H3A 2T8, Canada.
⁴ 1] Netherlands Institute for Radio Astronomy (ASTRON), Postbus 2, 7990 AA Dwingeloo, The Netherlands [2] Astronomical Institute 'Anton Pannekoek', University of Amsterdam, Science Park 904, 1098 XH Amsterdam, The Netherlands.
⁵ 1] Physics Department, University of Wisconsin-Milwaukee, PO Box 413, Milwaukee, Wisconsin 53201, USA [2] Department of Astronomy, University of Wisconsin-Madison, 475 North Charter Street, Madison, Wisconsin 53706-1582, USA.
⁶ Department of Astronomy and Astrophysics, University of Toronto, 50 St George Street, Toronto, Ontario M5S 3H4, Canada.
⁷ 1] Department of Physics and Astronomy, West Virginia University, White Hall, Box 6315, Morgantown, West Virginia 26506-6315, USA [2] Physics and Astronomy Department, Western Kentucky University, 1906 College Heights Boulevard, Bowling Green, Kentucky 42101-1077, USA.
⁸ Netherlands Institute for Radio Astronomy (ASTRON), Postbus 2, 7990 AA Dwingeloo, The Netherlands.
⁹ Center for Radiophysics and Space Research, Cornell University, 524 Space Sciences Building, Ithaca, New York 14853, USA.
¹⁰ Department of Astronomy, University of Wisconsin-Madison, 475 North Charter Street, Madison, Wisconsin 53706-1582, USA.
¹¹ Department of Physics, McGill University, 3600 University Street, Montreal, Quebec H3A 2T8, Canada.
¹² Department of Physics and Astronomy, West Virginia University, White Hall, Box 6315, Morgantown, West Virginia 26506-6315, USA.
¹³ 1] Netherlands Institute for Radio Astronomy (ASTRON), Postbus 2, 7990 AA Dwingeloo, The Netherlands [2] Astro Space Center of the Lebedev Physical Institute, 53 Leninskij Prospekt, Moscow 119991, Russia.
¹⁴ 1] National Radio Astronomy Observatory, 520 Edgemont Road, Charlottesville, Virginia 22903-2475, USA [2] Department of Physics and Astronomy, West Virginia University, White Hall, Box 6315, Morgantown, West Virginia 26506-6315, USA.
¹⁵ 1] Eureka Scientific Inc., 2452 Delmer Street, Suite 100, Oakland, California 94602-3017, USA [2] Physics Department, New York University at Abu Dhabi, PO Box 129188, Abu Dhabi, United Arab Emirates.
¹⁶ 1] Department of Physics and Astronomy, University of Texas at Brownsville, One West University Boulevard, Brownsville, Texas 78520, USA [2] Physics and Astronomy Department, University of New Mexico, 1919 Lomas Boulevard NE, Albuquerque, New Mexico 87131-0001, USA.

PMID: 24390352
DOI: 10.1038/nature12917

A millisecond pulsar in a stellar triple system

S M Ransom et al. Nature. 2014.

. 2014 Jan 23;505(7484):520-4.

doi: 10.1038/nature12917. Epub 2014 Jan 5.

Authors

Affiliations

¹ National Radio Astronomy Observatory, 520 Edgemont Road, Charlottesville, Virginia 22903-2475, USA.
² Department of Physics and Astronomy, University of British Columbia, 6224 Agricultural Road, Vancouver, British Columbia V6T 1Z1, Canada.
³ 1] Netherlands Institute for Radio Astronomy (ASTRON), Postbus 2, 7990 AA Dwingeloo, The Netherlands [2] Department of Physics, McGill University, 3600 University Street, Montreal, Quebec H3A 2T8, Canada.
⁴ 1] Netherlands Institute for Radio Astronomy (ASTRON), Postbus 2, 7990 AA Dwingeloo, The Netherlands [2] Astronomical Institute 'Anton Pannekoek', University of Amsterdam, Science Park 904, 1098 XH Amsterdam, The Netherlands.
⁵ 1] Physics Department, University of Wisconsin-Milwaukee, PO Box 413, Milwaukee, Wisconsin 53201, USA [2] Department of Astronomy, University of Wisconsin-Madison, 475 North Charter Street, Madison, Wisconsin 53706-1582, USA.
⁶ Department of Astronomy and Astrophysics, University of Toronto, 50 St George Street, Toronto, Ontario M5S 3H4, Canada.
⁷ 1] Department of Physics and Astronomy, West Virginia University, White Hall, Box 6315, Morgantown, West Virginia 26506-6315, USA [2] Physics and Astronomy Department, Western Kentucky University, 1906 College Heights Boulevard, Bowling Green, Kentucky 42101-1077, USA.
⁸ Netherlands Institute for Radio Astronomy (ASTRON), Postbus 2, 7990 AA Dwingeloo, The Netherlands.
⁹ Center for Radiophysics and Space Research, Cornell University, 524 Space Sciences Building, Ithaca, New York 14853, USA.
¹⁰ Department of Astronomy, University of Wisconsin-Madison, 475 North Charter Street, Madison, Wisconsin 53706-1582, USA.
¹¹ Department of Physics, McGill University, 3600 University Street, Montreal, Quebec H3A 2T8, Canada.
¹² Department of Physics and Astronomy, West Virginia University, White Hall, Box 6315, Morgantown, West Virginia 26506-6315, USA.
¹³ 1] Netherlands Institute for Radio Astronomy (ASTRON), Postbus 2, 7990 AA Dwingeloo, The Netherlands [2] Astro Space Center of the Lebedev Physical Institute, 53 Leninskij Prospekt, Moscow 119991, Russia.
¹⁴ 1] National Radio Astronomy Observatory, 520 Edgemont Road, Charlottesville, Virginia 22903-2475, USA [2] Department of Physics and Astronomy, West Virginia University, White Hall, Box 6315, Morgantown, West Virginia 26506-6315, USA.
¹⁵ 1] Eureka Scientific Inc., 2452 Delmer Street, Suite 100, Oakland, California 94602-3017, USA [2] Physics Department, New York University at Abu Dhabi, PO Box 129188, Abu Dhabi, United Arab Emirates.
¹⁶ 1] Department of Physics and Astronomy, University of Texas at Brownsville, One West University Boulevard, Brownsville, Texas 78520, USA [2] Physics and Astronomy Department, University of New Mexico, 1919 Lomas Boulevard NE, Albuquerque, New Mexico 87131-0001, USA.

PMID: 24390352
DOI: 10.1038/nature12917

Abstract

Gravitationally bound three-body systems have been studied for hundreds of years and are common in our Galaxy. They show complex orbital interactions, which can constrain the compositions, masses and interior structures of the bodies and test theories of gravity, if sufficiently precise measurements are available. A triple system containing a radio pulsar could provide such measurements, but the only previously known such system, PSR B1620-26 (refs 7, 8; with a millisecond pulsar, a white dwarf, and a planetary-mass object in an orbit of several decades), shows only weak interactions. Here we report precision timing and multiwavelength observations of PSR J0337+1715, a millisecond pulsar in a hierarchical triple system with two other stars. Strong gravitational interactions are apparent and provide the masses of the pulsar M[Symbol: see text](1.4378(13), where M[Symbol: see text]is the solar mass and the parentheses contain the uncertainty in the final decimal places) and the two white dwarf companions (0.19751(15)M[Symbol: see text] and 0.4101(3))M[Symbol: see text], as well as the inclinations of the orbits (both about 39.2°). The unexpectedly coplanar and nearly circular orbits indicate a complex and exotic evolutionary past that differs from those of known stellar systems. The gravitational field of the outer white dwarf strongly accelerates the inner binary containing the neutron star, and the system will thus provide an ideal laboratory in which to test the strong equivalence principle of general relativity.

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[1] Science. 2003 Jul 11;301(5630):193-6 - PubMed

[2] Science. 2003 Jul 11;301(5630):193-6 - PubMed

[3] Science. 1994 Apr 22;264(5158):538-42 - PubMed

[4] Science. 1994 Apr 22;264(5158):538-42 - PubMed

[5] Science. 2008 Jun 6;320(5881):1309-12 - PubMed

[6] Science. 2008 Jun 6;320(5881):1309-12 - PubMed

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A millisecond pulsar in a stellar triple system

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A millisecond pulsar in a stellar triple system

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Abstract

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