Shock location and CME 3D reconstruction of a solar type II radio burst with LOFAR
ASTRONOMY & ASTROPHYSICS 615 (2018) ARTN A89
The galactic halo pulsar population
Monthly Notices of the Royal Astronomical Society Oxford University Press 479:3 (2018) 3094-3100
Abstract:Most population studies of pulsars have hitherto focused on the disc of the Galaxy, the Galactic centre, globular clusters, and nearby galaxies. It is expected that pulsars, by virtue of their natal kicks, are also to be found in the Galactic halo. We investigate the possible population of canonical (i.e. non-recycled) radio pulsars in the halo, estimating the number of such pulsars, and the fraction that is detectable via single pulse and periodicity searches. Additionally, we explore the distributions of flux densities and dispersion measures (DMs) of this population. We also consider the effects of different velocity models and the evolution of inclination angle and magnetic field on our results. We show that ∼33 % of all pulsars beaming towards the Earth are in the halo but the fraction reduces to ∼1.5 % if we let the inclination angle and the magnetic field evolve as a falling exponential. Moreover, the fraction that is detectable is significantly limited by the sensitivity of surveys. This population would be most effectively probed by surveys using time-domain periodicity search algorithms. The current non-detections of pulsars in the halo can be explained if we assume that the inclination angle and magnetic field of pulsars evolve with time. We also highlight a possible confusion between bright pulses from halo pulsars and fast radio bursts with low DMs where further follow-up is warranted.
Initial results from the ALFABURST survey
Proceedings of the International Astronomical Union Cambridge University Press 13:S337 (2018) 414-415
Abstract:Here, we present initial results from the ALFABURST radio transient survey, which is currently running in a commensal mode with the ALFA receiver at the Arecibo telescope. We observed for a total of 1400 hours and have detected single pulses from known pulsars but did not detect any FRBs. The non-detection of FRBs is consistent with the current FRB sky rates.
Revival of the Magnetar PSR J1622-4950: Observations with MeerKAT, Parkes, XMM-Newton, Swift, Chandra, and NuSTAR
ASTROPHYSICAL JOURNAL 856:2 (2018) ARTN 180
Tracking of an electron beam through the solar corona with LOFAR
ASTRONOMY & ASTROPHYSICS 611 (2018) ARTN A57