论文标题
二进制脉冲星的新重力质量
New Graviton Mass Bound from Binary Pulsars
论文作者
论文摘要
在爱因斯坦的一般相对论中，重力是由无质量度量场介导的。一般相对论的扩展始终包括重力的质量对引力和宇宙学具有深远的影响。各种大型重力理论的显着特征可以通过Galileon模型来捕获，其中最简单的是Cubic Galileon。加里龙场的存在导致二元脉冲星中的额外重力辐射，在二元脉冲星中，vainshtein机制的抑制作用不如其第五强度对应物，这值得与观察结果进行详细的对抗。我们谨慎地选择了十四位二进制二进制脉冲星，从它们的固有轨道衰减率中，我们对吸引人的质量进行了新的限制，$ m_g \ lyssim 2 \ times 10^{ - 28} \，{\ rm ev}/c ev}/c ev}/c^2 $在95％的信心水平上，在$ \ ln m_ m_ g $ \ ln m_ g $。它等效于绑定在Graviton Compton波长$λ_g\ gtrsim 7 \ times 10^{21} \，{\ rm m} $。此外，我们广泛模拟了旋转恒星质量黑洞和银河系中心的超质量黑洞的脉冲星的到达时间，并调查了他们在不久的将来探测立方伽利略理论的前景。
In Einstein's general relativity, gravity is mediated by a massless metric field. The extension of general relativity to consistently include a mass for the graviton has profound implications for gravitation and cosmology. Salient features of various massive gravity theories can be captured by Galileon models, the simplest of which is the cubic Galileon. The presence of the Galileon field leads to additional gravitational radiation in binary pulsars where the Vainshtein mechanism is less suppressed than its fifth-force counterpart, which deserves a detailed confrontation with observations. We prudently choose fourteen well-timed binary pulsars, and from their intrinsic orbital decay rates we put a new bound on the graviton mass, $m_g \lesssim 2 \times 10^{-28}\,{\rm eV}/c^2$ at the 95% confidence level, assuming a flat prior on $\ln m_g$. It is equivalent to a bound on the graviton Compton wavelength $λ_g \gtrsim 7 \times 10^{21}\,{\rm m}$. Furthermore, we extensively simulate times of arrival for pulsars in orbit around stellar-mass black holes and the supermassive black hole at the Galactic center, and investigate their prospects in probing the cubic Galileon theory in the near future.
