论文标题
LSST调查策略和棕色矮人视差
LSST Survey Strategies and Brown Dwarf Parallaxes
论文作者
论文摘要
Vera C. Rubin天文台对时空的遗产调查（LSST）有可能测量数千个附近的Ultracool Dwarfs的视差，从而改善了棕色矮人亮度功能的测量。我们开发了一个简单的模型，以估计具有信噪比比率大于十个的LSST调查中十矮人和T矮人的数量。高质量的天体构成计划限制。我们使用定量指标评估不同可能的观察策略，并作为LSST社区输入过程的一部分提出建议。我们发现，新的替代视差样品将代表现有样品的几乎刻度级增长，每个光谱类型bin的〜50-100个物体用于L中期至中期矮人。样本量很健壮（+/- 5％）与正在考虑的大多数调查策略变化相对于大多数调查策略变更，尽管我们确实可以通过暮光之际的其他用途来确定张力可能会产生较大影响的区域。
The Vera C. Rubin Observatory's Legacy Survey of Space and Time (LSST) has the potential to measure parallaxes for thousands of nearby ultracool dwarfs, enabling improved measurements of the brown dwarf luminosity function. We develop a simple model to estimate the number of L dwarfs and T dwarfs with parallaxes with signal-to-noise ratio greater than ten in the baseline LSST survey. High quality astrometry imposes scheduling constraints. We assess different possible observing strategies using quantitative metrics and make recommendations as part of the LSST community input process. We find that the new substellar parallax sample will represent a nearly order-of-magnitude increase on existing samples, with ~50-100 objects per spectral type bin for late-L to mid-T dwarfs. The sample size is robust (+/- 5%) against most survey strategy changes under consideration, although we do identify areas of tension with other uses of twilight time that could have larger impact.
