论文标题
从超级质量黑洞位置对加利益的限制
Constraints on galileons from the positions of supermassive black holes
论文作者
论文摘要
Galileons是标量场理论，遵守Galileon对称性$φ\至φ + B +C_μx^μ$，如果它们具有动力学术语的倒置符号，则能够自动加速。这些理论违反了强大的等效原则，因此黑洞（BHS）不会偶尔到加利昂领域，而非权利的对象则具有第五力量，强度$ΔG / g _ {\ rm n} $相对于重力。对于在加利昂领域掉落梯度的星系，这会导致星系中心与其宿主超级质量BH之间的偏移。我们通过一组受约束的N体模拟（我们将其配音）重建了局部重力和Galileon场，并在逐式的基础上为这些偏移量开发了基于蒙特卡洛的前向模型。利用文献中1916年星系中的光学中心和主动银河核之间的测量偏移，在描述天体物理和观察性噪声的经验噪声模型上传播不确定性并边缘化，我们将galileon耦合为$ΔG / g_ _ $ _ = $ n} $ 16 <0.16 <0.16 <0.16 <0.16 <0.16 $ r _ {\ rm c} \ gtrsim h_0^{ - 1} $。
Galileons are scalar field theories which obey the Galileon symmetry $φ\to φ+ b + c_μx^μ$ and are capable of self-acceleration if they have an inverted sign for the kinetic term. These theories violate the Strong Equivalence Principle, such that black holes (BHs) do not couple to the Galileon field, whereas non-relativistic objects experience a fifth force with strength $ΔG / G_{\rm N}$ relative to gravity. For galaxies falling down a gradient in the Galileon field, this results in an offset between the centre of the galaxy and its host supermassive BH. We reconstruct the local gravitational and Galileon fields through a suite of constrained N-body simulations (which we dub CSiBORG) and develop a Monte Carlo-based forward model for these offsets on a galaxy-by-galaxy basis. Using the measured offset between the optical centre and active galactic nucleus of 1916 galaxies from the literature, propagating uncertainties in the input quantities and marginalising over an empirical noise model describing astrophysical and observational noise, we constrain the Galileon coupling to be $ΔG / G_{\rm N} < 0.16$ at $1σ$ confidence for Galileons with crossover scale $r_{\rm C} \gtrsim H_0^{-1}$.
