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A multiwavelength view of cooling versus AGN heating in the X-ray luminous cool-core of Abell 3581.

机译:Abell 3581的X射线发光冷芯中冷却与AGN加热的多波长视图。

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摘要

We report the results of a multiwavelength study of the nearby galaxy group, Abell 3581 (z = 0.0218). This system hosts the most luminous cool core of any nearby group and exhibits active radio mode feedback from the supermassive black hole in its brightest group galaxy, IC 4374. The brightest galaxy has suffered multiple active galactic nucleus outbursts, blowing bubbles into the surrounding hot gas, which have resulted in the uplift of cool ionized gas into the surrounding hot intragroup medium. High velocities, indicative of an outflow, are observed close to the nucleus and coincident with the radio jet. Thin dusty filaments accompany the uplifted, ionized gas. No extended star formation is observed; however, a young cluster is detected just north of the nucleus. The direction of rise of the bubbles has changed between outbursts. This directional change is likely due to sloshing motions of the intragroup medium. These sloshing motions also appear to be actively stripping the X-ray cool core, as indicated by a spiralling cold front of high-metallicity, low-temperature, low entropy gas.
机译:我们报告了附近银河系Abell 3581(z = 0.0218)的多波长研究结果。该系统拥有附近任何一个组中发光最亮的冷核,并在其最亮的银河系IC 4374中显示来自超大质量黑洞的有源无线电模式反馈。最亮的银河系遭受了多个活跃的银河系核爆发,向周围的热气中吹泡泡,这导致冷的离子化气体上升到周围的热集团内部介质中。靠近原子核并与无线电射流一致,观察到高速,表明有流出。细小的尘土细丝伴随着上升的电离气体。没有观察到扩展的恒星形成;但是,在原子核的北边发现了一个年轻的星团。在爆发之间,气泡的上升方向已经改变。这种方向变化可能是由于组内介质的晃动引起的。这些晃动似乎也正在活跃地剥夺X射线冷却芯,正如高金属,低温,低熵气体的螺旋冷锋所表明的那样。

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