1 Ocak 2016 Dergi makalesi Açık Erişim

Eksi, K. Y.; Andac, I. C.; Cikintoglu, S.; Gugercinoglu, E.; Motlagh, A. Vahdat; Kiziltan, B.

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        "name": "Eksi, K. Y."
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        "affiliation": "Istanbul Tech Univ, Fac Sci & Letters, Dept Engn Phys, TR-34469 Istanbul, Turkey", 
        "name": "Andac, I. C."
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      {
        "affiliation": "Istanbul Tech Univ, Fac Sci & Letters, Dept Engn Phys, TR-34469 Istanbul, Turkey", 
        "name": "Cikintoglu, S."
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      {
        "affiliation": "Istanbul Univ, Dept Astron & Space Sci, Fac Sci, TR-34119 Istanbul, Turkey", 
        "name": "Gugercinoglu, E."
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      {
        "affiliation": "Istanbul Tech Univ, Fac Sci & Letters, Dept Engn Phys, TR-34469 Istanbul, Turkey", 
        "name": "Motlagh, A. Vahdat"
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      {
        "affiliation": "Harvard Smithsonian Ctr Astrophys, 60 Garden St, Cambridge, MA 02138 USA", 
        "name": "Kiziltan, B."
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    "description": "The recently discovered rotationally powered pulsar PSR J1640-4631 is the first to have a braking index measured, with high enough precision, that is greater than 3. An inclined magnetic rotator in vacuum or plasma would be subject not only to spin-down but also to an alignment torque. The vacuum model can address the braking index only for an almost orthogonal rotator, which is incompatible with the single-peaked pulse profile. The magnetic dipole model with the corotating plasma predicts braking indices between 3 and 3.25. We find that the braking index of 3.15 is consistent with two different inclination angles, 18 degrees.5 +/- 3 degrees and 56 degrees +/- 4 degrees. The smaller angle is preferred given that the pulse profile has a single peak and the radio output of the source is weak. We infer the change in the inclination angle to be at the rate -0 degrees.23 per century, three times smaller in absolute value than the rate recently observed for the Crab pulsar.", 
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    "journal": {
      "issue": "1", 
      "title": "ASTROPHYSICAL JOURNAL", 
      "volume": "823"
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    "title": "THE INCLINATION ANGLE AND EVOLUTION OF THE BRAKING INDEX OF PULSARS WITH PLASMA-FILLED MAGNETOSPHERE: APPLICATION TO THE HIGH BRAKING INDEX OF PSR J1640-4631"
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