标量张量理论的牛顿极限与星系动力学：孤立星系与相互作用星系
Newtonian limit of scalar-tensor theories and galactic dynamics: isolated and interacting galaxies
摘要：
我们使用牛顿极限的一般标量张量理论周围的背景场来研究天体物理效应。引力理论通过增加一个汤川项来修正标准牛顿势，汤川项由两个理论参数来量化：$λ$，引力相互作用的长度尺度及其强度，$α$。在这个形式主义，我们首先提出了一个孤立星系中的酒吧形成的数值研究。我们发现，对于正的$α$，修正的引力使星系盘不稳定，并导致孤立星系中快速形成棒。$λ$值在$\approx 8$ - 14 kpc范围内，在孤立模型中产生最强的条。然后，我们通过考虑相互作用星系的潮汐效应来扩展这项工作。我们发送两个螺旋碰撞，并研究剩余物的酒吧属性。我们的参数（$λ, α$）的杆运动学特性的特点。
英文摘要：
We use the Newtonian limit of a general scalar-tensor theory around a background field to study astrophysical effects. The gravitational theory modifies the standard Newtonian potential by adding a Yukawa term to it, which is quantified by two theoretical parameters: $λ$, the lenghtscale of the gravitational interaction and its strength, $α$. Within this formalism we firstly present a numerical study on the formation of bars in isolated galaxies. We have found for positive $α$ that the modified gravity destabilizes the galactic discs and leads to rapid bar formation in isolated galaxies. Values of $λ$ in the range $\approx 8$ -- 14 kpc produce strongest bars in isolated models. Then, we extent this work by considering tidal effects due to interacting galaxies. We send two spirals to collide and study the bar properties of the remnant. We characterize the bar kinematical properties in terms of our parameters ($λ, α$).
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