论文标题
从银河系超级黑洞镜头旋转的旋转中子星的连续重力波观察到连续重力波的前景
Prospects for the observation of continuous gravitational waves from spinning neutron stars lensed by the galactic supermassive black hole
论文作者
论文摘要
我们研究了从旋转中子星（NSS）检测连续重力波（CGW）的前景，由银河系超质量黑洞在重力镜头上。假设银河NSS的各种天体动机的空间分布，我们发现应强烈镜头上的几个（$ \ sim 0-6 $）中子星的CGW信号。镜头将产生两个信号的副本（随着秒至分钟的时间延迟），它们会彼此干扰。 NS相对于镜头光轴的相对运动将改变干扰模式，这将有助于我们识别镜头信号。考虑到镜头信号的重大和时间延迟，我们通过基于地面检测器进行了研究。建模基于已知脉冲星的NSS的自旋分布，并假设$ε= 10^{ - 7} $的椭圆度，在涉及$ \ Mathcal {O}（O}（O}（O}（10^{12}}} {12}}）$ templete的$ \ nericist搜索中但是，第三代探测器具有$ \ sim 2-51 \％$检测到至少一个镜头CGW信号的概率。对于$ε= 10^{ - 8} $的椭圆度，检测概率将降低至$ \ sim 0-18 \，\％$。尽管很少见，但这种观察将使超级质量黑洞及其环境的有趣探索。
We study the prospects of detecting continuous gravitational waves (CGWs) from spinning neutron stars (NSs), gravitationally lensed by the galactic supermassive black hole. Assuming various astrophysically motivated spatial distributions of galactic NSs, we find that CGW signals from a few ($\sim 0-6$) neutron stars should be strongly lensed. Lensing will produce two copies of the signal (with time delays of seconds to minutes) that will interfere with each other. The relative motion of the NS with respect to the lensing optical axis will change the interference pattern, which will help us to identify a lensed signal. Accounting for the magnifications and time delays of the lensed signals, we investigate their detectability by ground-based detectors. Modelling the spin distribution of NSs based on that of known pulsars and assuming an ellipticity of $ε= 10^{-7}$, lensed CGWs are unlikely to be detectable by LIGO and Virgo in realistic searches involving $\mathcal{O}(10^{12})$ templates. However, third generation detectors have a $\sim 2-51\%$ probability of detecting at least one lensed CGW signal. For an ellipticity of $ε= 10^{-8}$, the detection probability reduces to $\sim 0-18 \, \% $. Though rare, such an observation will enable interesting probes of the supermassive black hole and its environment.
