12-15 July 2011
Saint George Hotel
Africa/Johannesburg timezone

Modeling X-ray Emission and the SED of the Binary Radio Pulsar AE Aquarii

13 Jul 2011, 14:15
15m
Acro2

Acro2

Oral Presentation Track D1 - Astrophysics APSS

Speaker

Mr Bosco Oruru (University of the Free State)

Description

The highly transient novalike variable AE Aqr is perhaps an ideal laboratory to study accretion related astrophysical fluid dynamics. It consists of a fast spinning highly magnetic white dwarf (WD) orbiting, and accreting mass, from a low-mass main sequence companion. The system emits, and has been detected in almost all wavelengths. AE Aqr is in a propeller state, and most of its emission properties are associated with the turbulent interaction between the accretion flow and the fast rotating magnetosphere of the WD. We have analysed its X-ray spectra using contemporaneous Chandra and Swift X-ray data. The results of this study show that the X-ray emission has both thermal and non-thermal characteristics. The thermal X-ray emission is modeled to be the result of bremsstrahlung emission of heated mass outflow above the polar caps, whereas the non-thermal X-ray emission is the result of synchrotron radiation of accelerated electrons outside the light cylinder radius of the WD. In this paper, some of the results, based on the constraints of the proposed thermal and non-thermal emission mechanisms, will be presented.

Consider for a student <br> &nbsp; award (Yes / No)? Yes
Would you like to <br> submit a short paper <br> for the Conference <br> Proceedings (Yes / No)? Yes
Level (Hons, MSc, <br> &nbsp; PhD, other)? PhD

Primary author

Mr Bosco Oruru (University of the Free State)

Co-author

Prof. Pieter Johannes Meintjes (University of the Free State)

Presentation Materials