论文标题
罗马银河膨胀时间域调查中的丽莎银河二进制
LISA Galactic Binaries in the Roman Galactic Bulge Time-Domain Survey
论文作者
论文摘要
丽莎可检测到的短期银河白矮人二进制文件是唯一保证的多通信剂重力 - 重力波天文学的持续来源。 2020年代的大规模调查为开展准备科学运动的机会提供了机会，以最大程度地提高未来多理性目标的科学收益率。 Nancy Grace Roman Space望远镜银河凸出时间域调查（在其参考调查设计中）将在银河凸起的七个字段中图像大约40,000次。尽管参考调查的节奏是针对通过微透镜检测系外行星的优化的，但它也能够检测短期白矮人二进制。在本文中，我们介绍了对罗马银河凸出时间域调查的分离短周期二进制数量的预测，以及对电磁调查设计的影响。尽管人口模型高度不确定，但我们发现基线调查检测到约5个分离的白矮二进制文件的可能性很大。参考调查还将有一个$ \ gtrsim20 \％$的机会，可以在银河凸起的距离处检测几个已知的基准白矮人二进制文件。
Short-period Galactic white dwarf binaries detectable by LISA are the only guaranteed persistent sources for multi-messenger gravitational-wave astronomy. Large-scale surveys in the 2020s present an opportunity to conduct preparatory science campaigns to maximize the science yield from future multi-messenger targets. The Nancy Grace Roman Space Telescope Galactic Bulge Time Domain Survey will (in its Reference Survey design) image seven fields in the Galactic Bulge approximately 40,000 times each. Although the Reference Survey cadence is optimized for detecting exoplanets via microlensing, it is also capable of detecting short-period white dwarf binaries. In this paper, we present forecasts for the number of detached short-period binaries the Roman Galactic Bulge Time Domain Survey will discover and the implications for the design of electromagnetic surveys. Although population models are highly uncertain, we find a high probability that the baseline survey will detect of order ~5 detached white dwarf binaries. The Reference Survey would also have a $\gtrsim20\%$ chance of detecting several known benchmark white dwarf binaries at the distance of the Galactic Bulge.
