论文标题
Einstein Dilaton Gauss Bonnet重力中GW150914的数值相对性模拟
Numerical relativity simulation of GW150914 in Einstein dilaton Gauss-Bonnet gravity
论文作者
论文摘要
目前用二进制黑洞重力波检测测试一般相对性（GR）的挑战是由于超越GR理论中缺乏合并波形而无法执行模型依赖性测试。在这项研究中，我们在爱因斯坦Dilaton Gauss-Bonnet（EDGB）重力中产生了第一个数值相对性二进制黑洞重力波形，这是一种更高的重力理论，具有弦理论中的动机。我们在降级降低的EDGB重力中进化了二进制黑洞系统，参数与GW150914一致。由于灵感阶段存在世俗的生长，我们关注波形的合并部分。我们计算与相应的一般相对性合并波形的不匹配，发现从仅弹性后的分析中，我们可以将EDGB Lengthscale限制为$ \ sqrt {α_\ Mathrm {gb}}} \ Lessim 11 $ km。
A present challenge in testing general relativity (GR) with binary black hole gravitational wave detections is the inability to perform model-dependent tests due to the lack of merger waveforms in beyond-GR theories. In this study, we produce the first numerical relativity binary black hole gravitational waveform in Einstein dilaton Gauss-Bonnet (EDGB) gravity, a higher-curvature theory of gravity with motivations in string theory. We evolve a binary black hole system in order-reduced EDGB gravity, with parameters consistent with GW150914. We focus on the merger portion of the waveform, due to the presence of secular growth in the inspiral phase. We compute mismatches with the corresponding general relativity merger waveform, finding that from a post-inspiral-only analysis, we can constrain the EDGB lengthscale to be $\sqrt{α_\mathrm{GB}} \lesssim 11$ km.
