Résumé du preprint Irfu-12-39

Irfu-12-39
IS IGR J11014–6103 A pulsar with the higthest known kick velocity?
J.A. Tomsick, A. Bodaghee, J. Rodriguez, S. Chaty, F. Camilo, F. Fornasini, F. Rahoui
We report on Chandra X-ray and Parkes radio observations of IGR J110146103, which is a possible pulsar wind nebula with a complex X-ray morphology and a likely radio counterpart. With the superb angular resolu- tion of Chandra, we find evidence that a portion of the extended emission may be related to a bow shock due to the putative pulsar moving through the interstellar medium. The inferred direction of motion is consistent with IGR J110146103 having been born in the event that produced the supernova remnant (SNR) MSH 1161A. If this association is correct, then previous constraints on the expansion of MSH 1161A imply a transverse velocity for IGR J110146103 of 2,4002,900 km s−1 , depending on the SNR model used. This would surpass the kick velocities of any known pulsars and rival or surpass the velocities of any compact objects that are associated with SNRs. While it is important to confirm the nature of the source, our radio pulsation search did not yield a detection.