LSST Survey Strategy in the Galactic Plane and Magellanic Clouds
LSST Survey Strategy in the Galactic Plane and Magellanic Clouds
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DOI：
10.3847/1538-4365/acd6f4
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发表时间：
2023-05
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影响因子：
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通讯作者：
R. Street;X. Li;S. Khakpash;E. Bellm;L. Girardi;L. Jones;N. Abrams;Y. Tsapras;M. Hundertmark;E. Bachelet;P. Gandhi;P. Szkody;W. Clarkson;R. Szabo;L. Prisinzano;R. Bonito;D. Buckley;J. P. Marais;R. D. Stefano
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文献类型：
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作者：
R. Street;X. Li;S. Khakpash;E. Bellm;L. Girardi;L. Jones;N. Abrams;Y. Tsapras;M. Hundertmark;E. Bachelet;P. Gandhi;P. Szkody;W. Clarkson;R. Szabo;L. Prisinzano;R. Bonito;D. Buckley;J. P. Marais;R. D. Stefano
银河系科学涵盖了研究银河系和麦哲伦星云的广泛课题，从年轻的恒星物体到X射线双星。绘制这些种群的地图，并探索其中的瞬变现象，是维拉·C·鲁宾天文台空间和时间遗产调查的主要科学目标之一。虽然早期版本的调查战略专门用于对银河系平面区域进行相对较少的访问，但正在考虑的较新战略设想在选定的具有高度科学兴趣的区域内有更高的节奏。银河系科学的范围对评估哪些战略提供最高的科学回报提出了挑战。在这里，我们介绍了旨在评估Rubin调查策略模拟的指标，基于它们在感兴趣的区域内向星系科学中的不同主题提供的观测的节奏，使用由Timescale定义的可变性类别。我们还比较了在每个滤镜中获得的曝光比例与针对不同科学目标推荐的曝光比例。我们发现，Baseline_v2.x模拟以足够高的节奏提供对高优先级区域的观察，以可靠地检测时间尺度上的可变性&>10天或更长时间。后续观察可能是必要的，以便在较短的时间尺度上适当地描述变异性，特别是瞬变。结合所考虑的所有科学案例的感兴趣区域，我们确定了银河系平面和麦哲伦云中最优先的区域。我们建议在未来的模拟中使用这些改进的调查足迹，以探索滚动节奏情景，并优化不同频段中的观测序列。
Galactic science encompasses a wide range of subjects in the study of the Milky Way and Magellanic Clouds, from young stellar objects to X-ray binaries. Mapping these populations, and exploring transient phenomena within them, are among the primary science goals of the Vera C. Rubin Observatory’s Legacy Survey of Space and Time. While early versions of the survey strategy dedicated relatively few visits to the Galactic Plane region, more recent strategies under consideration envision a higher cadence within selected regions of high scientific interest. The range of galactic science presents a challenge in evaluating which strategies deliver the highest scientific returns. Here we present metrics designed to evaluate Rubin survey strategy simulations, based on the cadence of observations they deliver within regions of interest to different topics in galactic science, using variability categories defined by timescale. We also compare the fractions of exposures obtained in each filter with those recommended for the different science goals. We find that the baseline_v2.x simulations deliver observations of the high-priority regions at sufficiently high cadence to reliably detect variability on timescales >10 days or more. Follow-up observations may be necessary to properly characterize variability, especially transients, on shorter timescales. Combining the regions of interest for all the science cases considered, we identify those areas of the Galactic Plane and Magellanic Clouds of highest priority. We recommend that these refined survey footprints be used in future simulations to explore rolling cadence scenarios, and to optimize the sequence of observations in different bandpasses.