Next-Gen modelling for high-precision exoplanet microlensing surveys

用于高精度系外行星微透镜勘测的下一代建模

• 批准号: 2107389
• 金额: --
• 依托单位: University of Manchester
• 依托单位国家: 英国
• 项目类别: Studentship
• 财政年份: 2018
• 资助国家: 英国
• 起止时间: 2018 至 无数据
• 项目状态: 已结题
• 来源: https://gtr.ukri.org/projects?ref=studentship-2107389
• 关键词: Next; Gen; modelling; precision; exoplanet

The abundance of exoplanets not bound to any star, floating in the interstellar medium, known asfree floating planets (FFPs) is currently poorly constrained. Direct imaging has provided severalconfirmed FFPs, but does not allow us to extract FFP statistics. Via the gravitational microlensingmethod, we are more likely to find these illusive objects due to the methods invariability to the lensflux. Nonetheless, microlensing surveys have also provided only a handful of candidates. This is dueto the comparatively small masses of FFPs, on similar scales to planet masses, and thecorrespondingly short timescale of microlensing events. Upcoming surveys such as by the LargeSynoptic Survey Telescope (LSST) and the Wide Field Infrared Survey Telescope (WFIRST) couldprovide unprecedented detail on the galactic population of FFPs and also allow for properties such asFFP mass measurements to be made, also providing insight into planetary formation. To this end, theproject will focus on developing an FFP search strategy for the LSST and WFIRST. This will involvedeveloping more a more rigorous calculation of the microlensing optical depth, as well asinvestigating the potential for FFP mass measurements given the technology of the respectivetelescopes.

当前，浮动的恒星不束缚在星际介质中，已知的无效浮动行星（FFPS）的丰度不受限制。直接成像提供了几个确认的FFP，但不允许我们提取FFP统计信息。通过重力微透镜方法，由于镜头不可分性的方法，我们更有可能找到这些虚幻的物体。尽管如此，微透镜调查也仅提供了少数候选人。这是Dueto的FFP质量相对较小，在与行星质量相似的尺度上，以及相应地相应的微透镜事件的时间尺度。即将进行的调查，例如宽符号调查望远镜（LSST）和大型现场红外调查望远镜（WFIRST）可以证明有关FFP的银河系群体的前所未有的细节，还允许制造Aspffp质量测量的属性，从而提供洞察力形成。为此，该项目将集中于为LSST和WFIRST制定FFP搜索策略。这将涉及更严格的微透镜光学深度计算，并考虑到鉴于相关eScopes的技术，还可以对FFP质量测量的潜力进行评估。

项目成果

MaBµlS-2: high-precision microlensing modelling for the large-scale survey era

MaB µlS-2：大规模测量时代的高精度微透镜建模

• DOI: 10.1093/mnras/staa2375
• 发表时间: 2020
• 期刊: Monthly Notices of the Royal Astronomical Society
• 影响因子: 4.8
• 作者: Specht D