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arXiv 0811.1576astro-ph
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星系尺度上的高度电离气体:相互作用的塞弗特星系LEDA 135736的测绘

Highly ionized gas on galaxy scales: mapping the interacting Seyfert galaxy LEDA 135736

J. Gerssen, D. J. Wilman, L. Christensen, R. G. Bower, V. Wild

摘要:

我们已使用VIMOS IFU绘制Seyfert 1.9 galaxy LEDA 135736的属性。这些地图揭示了一些有趣的特征,包括:一个可探测到9千秒差距的扩展窄线区,一个位于距离中心12千秒差距投影距离处的强烈恒星形成区,一个椭圆形伴星系,以及沿ENLR长轴排列的运动学特征,这些特征与射电喷流驱动的质量外流一致。我们认为ENLR是由AGN电离的面外气体引起的,而AGN又可能是由与伴星系的相互作用触发的,这也可以解释恒星形成和形态特征的爆发。只有大约百分之二的ENLR的动能是在质量流出。我们由此推断,射流所提供的大部分机械能是用来加热这种气体的。

英文摘要:

We have used the VIMOS IFU to map the properties of the Seyfert 1.9 galaxy LEDA 135736. These maps reveal a number of interesting features including: an Extended Narrow Line Region detectable out to 9 kpc, an area of intense star formation located at a projected distance of 12 kpc from the centre, an elliptical companion galaxy, and kinematic features, aligned along the long-axis of the ENLR, that are consistent with radio jet-driven mass outflow. We propose that the ENLR results from extra-planar gas ionized by the AGN, and that the AGN in turn might be triggered by interaction with the companion galaxy, which can also explain the burst of star formation and morphological features. Only about two percent of the ENLR's kinetic energy is in the mass outflow. We infer from this that the bulk of mechanical energy imparted by the jet is used to heat this gas.

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