标题： 3C 293中由喷流引发的温暖气体外流 显示英文标题

标题： A jet-induced outflow of warm gas in 3C 293

摘要： 利用长缝发射线光谱，我们在附近的强射电星系 3C 293（红移 z = 0.045）中探测到一个速度高达 1000 公里/秒的电离气体高速外流。 该高速外流位于核区以东约 1 千秒差距处，在因扭曲的射电喷流而增强的射电辐射区域。我们展示了表明该高速外流是由喷流与星际物质相互作用引起的证据。 外流电离气体的运动学特征与该星系中中性氢气体的高速外流非常相似，这表明这两种外流都是由相同的驱动机制引起的。 虽然外流电离气体的质量约为 1 × 10⁵ 倍太阳质量，但参与中性外流的总 HI 质量大约高出 100 倍（10⁷ 倍太阳质量）。这表明，尽管推动外流所需的能量非常高，但大多数气体仍然保持中性或重新变为中性。 在内射电喷流轴向的其他几个区域也观察到了电离气体的其他外流现象，尽管不像在增强射电辐射区域那样显著。宿主星系主轴上发射线气体的规则运动学特性揭示了一个延伸达 30 千秒差距的旋转电离气体盘。 显示英文摘要

摘要： Using long slit emission-line spectra we detect a fast outflow of ionized gas, with velocities up to 1000 km/s, in the nearby powerful radio galaxy 3C 293 (z = 0.045). The fast outflow is located about 1 kpc east of the nucleus, in a region of enhanced radio emission due to the presence of a distorted radio jet. We present results that indicate that this fast outflow is caused by a jet-ISM interaction. The kinematics of the outflowing ionized gas are very similar to those of a fast outflow of neutral hydrogen gas in this galaxy, suggesting that both outflows are the result of the same driving mechanism. While the mass of the outflowing ionized gas is about 1 x 10e5 M_sun, the total HI mass involved in the neutral outflow is about 100 times higher (10e7 M_sun). This shows that, despite the high energies that must be involved in driving the outflow, most of the gas remains, or becomes again, neutral. Other outflows of ionized gas, although not as pronounced as in the region of the enhanced radio emission, are also seen in various other regions along the axis of the inner radio jets. The regular kinematics of the emission-line gas along the major axis of the host galaxy reveal a rotating ionized gas disk 30 kpc in extent.