TITLE:
High Energy Emission from Magnetar Due to Giant Flare
AUTHORS:
A. Kader, K. Duorah
KEYWORDS:
Solar Flares; Magnetic Reconnection; Gamma-Rays; Observations—Neutron Stars; Magnetic Fields—Magnetars
JOURNAL NAME:
International Journal of Astronomy and Astrophysics,
Vol.3 No.2,
June
7,
2013
ABSTRACT: We propose a theoretical
model for magnetar giant flare to explain the flaring activity on 2004 December
27 from SGR1806-20 comprehensively. A global rearrangement is expected by the
magnetic reconnection that requires explaining the giant SGR
flares. In this paper we propose two regions of flares: preflare on the surface
of magnetar and main burst at a distance of light cylinder radius. Acquiring
the maximum potential drop on the magnetar surface, adopting space charge
limited flow model, and using magnetic field B ≈ 1015 G, the luminosities of flare energies release for the preflare phase and main
burst phase are found to be in the order of 1041 erg·sˉ1 and 1044 erg·sˉ1 respectively, conforming to magnetar
burst energy and flare temperature is determined by considering black body
radiation.