Maria Noemi Iacolina
INAF-Astronomical Observatory of Cagliari, Italy
Title: Long-term timing of the double pulsar J0737-3039 with XMM-Newton
Biography
Biography: Maria Noemi Iacolina
Abstract
The relativistic double neutron star binary PSR J0737-3039 shows clear evidences of orbital phase-dependent wind-companion interaction, both in radio and X-rays. In this work, we performed the timing analysis of 2006 and 2011 XMM-Newton large programs data. We detected pulsations from PSR J0737-3039A (PSR A) - with very high precision in measuring the spin period and PSR J07370-3039B (PSR B) despite its previous disappearance in radio. Interaction of PSR A's wind with PSR B's magnetosphere could have determinate the observed orbital pulsed flux and profile variations of PSR B as well as a loss of pulsar phase coherence on timescales of years. Evidence of orbital flux variability (∼7%) is observed for the first time, involving a bow-shock scenario between PSR A's wind and PSR B's magnetosphere.