论文标题
马尔可夫链蒙特卡洛方法，用于测量无线电高的活性银核中喷气裂纹的方法
A Markov Chain Monte Carlo approach for measurement of jet precession in radio-loud active galactic nuclei
论文作者
论文摘要
喷气序列可以揭示出超大型黑洞的二元系统的存在。从无线电大通AGN中准确测量射流进液参数的能力对于限制二进制超质量黑洞种群很重要，这是由于分层星系的演化而预期的。沿特定来源的视线的年龄，形态和方向通常会导致有关喷气路径的不确定性。本文提出了一种使用2D MCMC曲线拟合算法有效确定进动参数的新方法，该算法为我们提供了拟合参数的完整后验概率分布。将方法应用于Cygnus A，我们发现了先前建议的证据表明该来源正在进攻。在二进制黑洞的背景下进行解释会导致parsec量表的限制，并可能对推定的超大型二进制尺寸分离。
Jet precession can reveal the presence of binary systems of supermassive black holes. The ability to accurately measure the parameters of jet precession from radio-loud AGN is important for constraining the binary supermassive black hole population, which are expected as a result of hierarchical galaxy evolution. The age, morphology, and orientation along the line of sight of a given source often result in uncertainties regarding jet path. This paper presents a new approach for efficient determination of precession parameters using a 2D MCMC curve-fitting algorithm which provides us a full posterior probability distribution on the fitted parameters. Applying the method to Cygnus A, we find evidence for previous suggestions that the source is precessing. Interpreted in the context of binary black holes leads to a constraint of parsec scale and likely sub-parsec orbital separation for the putative supermassive binary.
