Fermi-LAT Observations of Magnetars and their Environments
P. H. T. Tam
K. H. Yeung, A. K. H. Kong
Abstract:
The very strong magnetic field of magnetars (with SGRs/AXPs being the best candidates) is the main energy reservoir for radiations from magnetars. High-energy emission up to ~200 keV has been seen by INTEGRAL, while some models predict magnetars may produce persistent or transient gamma-rays detectable by the LAT. Given the very strong surface magnetic field of SGRs/AXPs and their high X-ray luminosities during flares or outbursts, any gamma-ray emission produced close to the magnetar is largely subject to absorption by the pair production processes. In this presentation, we show our results using more than six years of Fermi-LAT data. In several cases gamma-rays are found towards the direction of magnetars, but in no case can these gamma-rays be unambiguously associated with magnetars yet. We discuss possible explanations for the observed gamma-rays.
- Curator: J.D. Myers
- NASA Official: Phil Newman
- Science Official: Elizabeth Hays
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