Rapid gas supply to a nuclear region by self-gravitational instability in a weak barred potential
Rapid gas supply to a nuclear region by self-gravitational instability in a weak barred potential
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通过弱禁止势中的自引力不稳定性向核区域快速供应天然气
DOI：
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发表时间：
1992
期刊：
影响因子：
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通讯作者：
A. Habe
中科院分区：
文献类型：
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作者：
K. Wada;A. Habe
为了解释星暴星系中心区域气体快速流入的机制，在考虑气体自引力的条件下，利用二维数值模拟研究了弱棒势下的气体动力学。假设在弱棒势内存在内林德布莱德共振（ILR）的情况下，气体最初均匀分布在弱棒势的旋转半径内，并进行自引力气体运动。数值结果表明，当初始气体与恒星的质量比大于10%时，在ILR半径附近气体聚集形成拉长的气体环后，中心拉长的气体环变得不稳定并坍缩
Gas dynamics are studied in a weak barred potential with 2D numerical simulations, taking into account self-gravity of gas in order to explain the mechanism of rapid gas inflow into the central region of a starburst galaxy. It is assumed that the gas is initially uniformly distributed inside the corotation radius of the weak barred potential and pursue the self-gravitational gas motion in the case that the inner Lindblad resonance (ILR) exists in this potential. The numerical results show that, for an initial gas-to-stellar mass ratio greater than 10 per cent, a central elongated gas ring becomes unstable and collapses after gas accumulates to form the elongated gas ring near the ILR radius