High Energy Emission from Magnetar Due to Giant Flare

• 作者: A. Kader K. Duorah
• 来源期刊: 天文学与天体物理学国际期刊(英文)
• 学科: 地球科学
• 关键词: Solar FLARES MAGNETIC RECONNECTION GAMMA-RAYS Observations—Neutron Stars MAGNETIC Fields—Magnetars
• 年，卷（期）: 2013,（2）
• 页码范围: 174-179
• 页数: 6页
• 分类号: P1

摘要

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.