论文标题
二进制系统中毫秒中子星对R模式和山脉的限制
Constraints on r-modes and mountains on millisecond neutron stars in binary systems
论文作者
论文摘要
连续重力波是旋转中子星中不对称发射的几乎是单色信号。这些信号尚未检测到。从孤立的中子恒星中深入搜索连续重力波需要大量的计算费用。对二进制系统中的中子星的深入搜索甚至更昂贵，但是这些目标可能是更有前途的发射器，尤其是在数百个HZ区域，在该区域，地面引力波检测器最敏感。我们在这里展示了整个搜索连续信号的频率在300至500 Hz之间，从轨道周期为15至60天的二元系统中的中子星，预计的半肌轴介于10到40光秒之间。这是探测此频率范围的高级基因数据上唯一的二进制搜索。与以前的结果相比，我们的搜索超过一个数量级。我们没有检测到任何信号，但是我们的结果排除了合理且未探索的中子恒星构型，例如，相对变形的中子星在距地球1 kpc内的相对变形大于3E-6的中子星，而在同一距离内的Alpha〜几乎没有1E-4的R模式发射。
Continuous gravitational waves are nearly monochromatic signals emitted by asymmetries in rotating neutron stars. These signals have not yet been detected. Deep all-sky searches for continuous gravitational waves from isolated neutron stars require significant computational expense. Deep searches for neutron stars in binary systems are even more expensive, but potentially these targets are more promising emitters, especially in the hundreds-Hz region, where ground-based gravitational wave detectors are most sensitive. We present here an all-sky search for continuous signals with frequency between 300 and 500 Hz, from neutron stars in binary systems with orbital period between 15 and 60 days, and projected semi-major axis between 10 and 40 light-seconds. This is the only binary search on Advanced-LIGO data that probes this frequency range. Compared to previous results, our search is over an order of magnitude more sensitive. We do not detect any signals, but our results exclude plausible and unexplored neutron star configurations, for example, neutron stars with relative deformations greater than 3e-6 within 1 kpc from Earth and r-mode emission at the level of alpha ~ few 1e-4 within the same distance.
