The Discovery of an Eccentric Millisecond Pulsar in the Galactic Plane
| Autor: | David J. Champion, Scott M. Ransom, Patrick Lazarus, Fernando Camilo, Victoria M. Kaspi, David J. Nice, Paulo C. C. Freire, James M. Cordes, Jason W. T. Hessels, Cees Bassa, Duncan R. Lorimer, Ingrid H. Stairs, Joeri van Leeuwen, Zaven Arzoumnian, Don C. Backer, N. D. Ramesh Bhat, Shami Chatterjee, Fronefield Crawford, Julia S. Deneva, Claude-André Faucher-Giguère, B. M. Gaensler, JinLin Han, Fredrick A. Jenet, Laura Kasian, Vlad I. Kondratiev, Michael Kramer, Joseph Lazio, Maura A. McLaughlin, Ben W. Stappers, Arun Venkataraman, Wouter Vlemmings, C. Bassa, Z. Wang, A. Cumming, V. M. Kaspi |
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| Přispěvatelé: | High Energy Astrophys. & Astropart. Phys (API, FNWI), Bassa, C.G., Wang, Z., Cumming, A., Kaspi, V.M. |
| Rok vydání: | 2008 |
| Předmět: |
Physics
010308 nuclear & particles physics Astronomy Astrophysics::High Energy Astrophysical Phenomena X-ray binary Astrophysics Astrophysics::Cosmology and Extragalactic Astrophysics 01 natural sciences Binary pulsar Neutron star Pulsar Millisecond pulsar Globular cluster 0103 physical sciences Binary star Astrophysics::Solar and Stellar Astrophysics Astrophysics::Earth and Planetary Astrophysics 010303 astronomy & astrophysics GeneralLiterature_REFERENCE(e.g. dictionaries encyclopedias glossaries) Astrophysics::Galaxy Astrophysics X-ray pulsar |
| Zdroj: | Bassa, C.G.; Wang, Z.; Cumming, A. (ed.), 40 Years of Pulsars: Millisecond Pulsars, Magnetars and More, 448-452. [S.l.] : American Institute of Physics STARTPAGE=448;ENDPAGE=452;TITLE=Bassa, C.G.; Wang, Z.; Cumming, A. (ed.), 40 Years of Pulsars: Millisecond Pulsars, Magnetars and More 40 Years of Pulsars: Millisecond Pulsars, Magnetars and More: McGill University, Montréal, Canada, 12-17 August 2007, 448-452 STARTPAGE=448;ENDPAGE=452;TITLE=40 Years of Pulsars: Millisecond Pulsars, Magnetars and More Bassa, C.G.; Wang, Z.; Cumming, A. (ed.), 40 Years of Pulsars: Millisecond Pulsars, Magnetars and More, pp. 448-452 |
| Popis: | The evolution of binary systems is governed by their orbital properties and the stellar density of the local environment. Studies of neutron stars in binary star systems offer unique insights into both these issues. In an Arecibo survey of the Galactic disk, we have found PSR J1903+0327, a radio emitting neutron star (a "pulsar") with a 2.15 ms rotation period, in a 95-day orbit around a massive companion. Observations in the infra-red suggests that the companion may be a main-sequence star. Theories requiring an origin in the Galactic disk cannot account for the extraordinarily high orbital eccentricity observed (0.44) or a main-sequence companion of a pulsar that has spin properties suggesting a prolonged accretion history. The most likely formation mechanism is an exchange interaction in a globular star cluster. This requires that the binary was either ejected from its parent globular cluster as a result of a three-body interaction, or that that cluster was disrupted by repeated passages through the disk of the Milky Way. |
| Databáze: | OpenAIRE |
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