13–17 Sept 2021
Africa/Johannesburg timezone

Low power pulsed emission at the spin period of the WD in AR Scorpii?

16 Sept 2021, 16:55
15m
Contributed talk Pulsars Pulsars I

Speaker

Quinton Kaplan (University of the Free State)

Description

Previous studies indicate that AR Sco’s surrounding region complicates the search for Gamma-ray emission from this source. The fact that AR Sco lies close to the Galactic plane and strong nearby VHE Fermi sources, make it difficult to constrain and quantify an upper-limit of the emission from AR Sco’s location in the sky. In this study, a search for high energy gamma-ray emission was conducted to identify possible pulsed emission signatures within or above the noise level. A period analysis revealed low level but consistent emission at the spin period of the white dwarf (117 sec) over a period of 10 years. A control analysis also shows a decrease in signal strength at the spin period in regions further away from the coordinates centred on AR Sco, which may indicate the presence of low level pulsed Gamma-ray emission from AR Sco.

Author

Quinton Kaplan (University of the Free State)

Co-authors

H.J. van Heerden (University of the Free State) P.J. Meintjes (University of the Free State)

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