论文标题

大规模调查中的GPU加速定期来源识别:测量$ P $和$ \ dot {p} $

GPU-Accelerated Periodic Source Identification in Large-Scale Surveys: Measuring $P$ and $\dot{P}$

论文作者

Katz, Michael L., Cooper, Olivia R., Coughlin, Michael W., Burdge, Kevin B., Breivik, Katelyn, Larson, Shane L.

论文摘要

许多灵感和合并恒星残余物在轨道或碰撞时会发出引力和电磁辐射。这些引力波及其相关的电磁对应物提供了有关合并性质的见解,从而使我们能够进一步限制二进制的特性。随着激光干涉仪空间天线(LISA)的未来启动,需要对超模型二进制(UCB)系统进行后续观测和模型。当前和即将进行的长基线时间域调查将观察到许多UCB。我们提出了一个新的快速周期性搜索工具,该工具能够根据条件熵算法搜索通用的周期性信号。这种新的实现允许在期间($ p $)和该期间的时间派生($ \ dot {p} $)进行网格搜索。为了证明该工具的使用情况,我们使用了由人口合成代码\ cosmic产生的UCB种群的小型,手工挑选的子集,以及在固定固有参数下在不同时期内的自定义目录。我们通过使用现有的黯然失色的二进制光曲线模型来计算由于重力辐射引起的轨道时期变化,从而模拟了未来时间域调查观察到的光曲线。我们发现,对于在小于$ \ sim $ 10分钟的轨道周期中检测二进制文件,具有$ \ dot {p} $值的搜索是必需的。我们还表明,它可用于查找和表征较长时期的二进制文件,但计算成本更高。我们的代码称为GCE(GPU加速条件熵)。它可在https://github.com/mikekatz04/gce上找到。

Many inspiraling and merging stellar remnants emit both gravitational and electromagnetic radiation as they orbit or collide. These gravitational wave events together with their associated electromagnetic counterparts provide insight about the nature of the merger, allowing us to further constrain properties of the binary. With the future launch of the Laser Interferometer Space Antenna (LISA), follow up observations and models are needed of ultracompact binary (UCB) systems. Current and upcoming long baseline time domain surveys will observe many of these UCBs. We present a new fast periodic object search tool capable of searching for generic periodic signals based on the Conditional Entropy algorithm. This new implementation allows for a grid search over both the period ($P$) and the time derivative of the period ($\dot{P}$). To demonstrate the usage of this tool, we use a small, hand-picked subset of a UCB population generated from the population synthesis code \cosmic, as well as a custom catalog for varying periods at fixed intrinsic parameters. We simulate light curves as likely to be observed by future time domain surveys by using an existing eclipsing binary light curve model accounting for the change in orbital period due to gravitational radiation. We find that a search with $\dot{P}$ values is necessary for detecting binaries at orbital periods less than $\sim$10 min. We also show it is useful in finding and characterizing binaries with longer periods, but at a higher computational cost. Our code is called gce (GPU-Accelerated Conditional Entropy). It is available at https://github.com/mikekatz04/gce.

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