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http://hdl.handle.net/20.500.12386/24965
Titolo: | Long-term Study of the Double Pulsar J0737-3039 with XMM-Newton: Pulsar Timing | Autori: | Iacolina, M. N. PELLIZZONI, ALBERTO PAOLO EGRON, ELISE MARIE JEANNE POSSENTI, ANDREA Breton, R. Lyutikov, M. Kramer, M. BURGAY, MARTA Motta, S. E. DE LUCA, Andrea Tiengo, A. |
Data pubblicazione: | 2016 | Rivista: | THE ASTROPHYSICAL JOURNAL | Numero: | 824 | Fascicolo: | 2 | Da pagina:: | 87 | Abstract: | The relativistic double neutron star binary PSR J0737-3039 shows clear evidence of orbital phase-dependent wind-companion interaction, both in radio and X-rays. In this paper, we present the results of timing analysis of PSR J0737-3039 performed during 2006 and 2011 XMM-Newton Large Programs that collected ∼20,000 X-ray counts from the system. We detected pulsations from PSR J0737-3039A (PSR A) through the most accurate timing measurement obtained by XMM-Newton so far, the spin period error being of 2 × 10<SUP>-13</SUP> s. PSR A’s pulse profile in X-rays is very stable despite significant relativistic spin precession that occurred within the time span of observations. This yields a constraint on the misalignment between the spin axis and the orbital momentum axis {δ }<SUB>{{A</SUB>}}≈ {6.6}<SUB>-5.4</SUB><SUP>+1.3</SUP> deg, consistent with estimates based on radio data. We confirmed pulsed emission from PSR J0737-3039B (PSR B) in X-rays even after its disappearance in radio. The unusual phenomenology of PSR B’s X-ray emission includes orbital pulsed flux and profile variations as well as a loss of pulsar phase coherence on timescales of years. We hypothesize that this is due to the interaction of PSR A’s wind with PSR B’s magnetosphere and the orbital-dependent penetration of the wind plasma onto PSR B closed field lines. Finally, the analysis of the full XMM-Newton data set provided evidence of orbital flux variability (∼7%) for the first time, involving a bow-shock scenario between PSR A’s wind and PSR B’s magnetosphere. | URI: | http://hdl.handle.net/20.500.12386/24965 | URL: | https://iopscience.iop.org/article/10.3847/0004-637X/824/2/87/meta | ISSN: | 0004-637X | DOI: | 10.3847/0004-637X/824/2/87 | Bibcode ADS: | 2016ApJ...824...87I | Fulltext: | open |
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