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来自一个候选银河磁星的耀斑表明,它是暗淡的孤立中子星的缺失环节
A J Castro-Tirado1, A de Ugarte Postigo, J Gorosabel
1Instituto de Astrofísica de Andalucía del Consejo Superior de Investigaciones Científicas (IAA-CSIC), PO Box 03004, E-18080 Granada, Spain. ajct@iaa.es
Nature
|September 27, 2008
概括
研究人员观察到SWIFT J195509+261406的强烈光学发光,这表明它是一个孤立的磁星. 这一发现将柔软的玛射线重复器与暗淡的孤立中子星联系起来.
科学领域:
- * 天文学和天体物理学
- *高能天体物理学 *高能天体物理学
- * 中子星物理学
背景情况:
- *磁星是年轻的中子星,其特点是具有极强磁场 (10^14-10^15 G).
- *它们通常被观察为软玛射线重复器 (SGR) 或异常X射线脉冲星 (AXP).
- * 磁星耀斑或静止状态的光学对应物仍然难以捉摸.
研究的目的:
- * 为了研究神秘的天体源的性质SWIFT J195509+261406.
- * 描述其在多个波长的发火活动.
- *确定其作为磁星的潜在分类及其与其他中子星类型的关系.
主要方法:
- *多波长观测,包括光学,红外和无线电天文学.
- * 长期监测燃烧事件的情况.
- * 无线电观测以确定银河系起源和估计距离.
主要成果:
- *在三天内,从SWIFT J195509+261406检测到超过40次光学发光事件.
- *在初始光学活动11天后,观察到一个微弱的红外发光.
- *无线电观测证实了源头的银河系起源,并设定了~3.7 kpc的最低距离.
结论:
- *建议SWIFT J195509+261406是一个孤立的磁星,表现出光学爆发活动.
- * 这一事件表明,这种磁星的X射线发射阶段可能是短暂的.
- * 源可能代表一个连接持久SGRs/AXPs与昏暗的孤立中子星的过渡物体.
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