Type Ia supernova observations combining data from the Euclid mission and the Vera C. Rubin Observatory
Type Ia supernova observations combining data from the Euclid mission and the Vera C. Rubin Observatory
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Ia 型超新星观测结合了 Euclid 任务和 Vera C. Rubin 天文台的数据
DOI：
10.1093/mnras/stad2179
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发表时间：
2023
影响因子：
4.8
通讯作者：
Bailey A
中科院分区：
文献类型：
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作者：
Bailey A
欧几里德任务将首次提供近红外深（三个区域，每个区域10-20平方度）和宽（10000平方度）区域的覆盖。虽然这项调查的目的不是发现瞬变现象，但深场将在两周内进行重复观测，然后间隔大约六个月。在这个分析中，我们探讨如何有用的深场观测将测量Ia型超新星（SNe Ia）的属性。使用模拟，包括Euclid的计划深度，面积和节奏在深场，我们计算出，超过3700 SNe之间的0.0 << 1.5将有至少五个Euclid检测周围的峰值与信噪比大于3。虽然欧几里德光变曲线本身不足以直接限制距离，但当与传统的时空调查（LSST）深场观测相结合时，我们发现SN距离的不确定性降低了20- 30%< 0.8 and by 40-50 per cent for>。此外，我们预测如何以及additionalEuclidmock数据可以用来约束一个关键的系统在超新星Ia研究-之间的SNe托管在高质量（> 1010 M <$）和低质量（<1010 M <$）星系的光度“步骤”的大小。该测量在静止帧近红外（NIR）中具有独特的信息。我们预测，如果该步骤是由灰尘引起的，我们将能够在4σ水平上测量其在NIR中与光学相比的减少。我们强调，LSST和Euclidobserving在这项工作中使用的策略仍然是临时的，需要一定程度的联合处理。尽管如此，这些最初的结果是有希望的，假设欧几里得在南希罗曼太空望远镜（罗曼）之前就开始观测，我们希望这些数据集对罗曼本身的准备工作非常有帮助。
TheEuclidmission will provide first-of-its-kind coverage in the near-infrared over deep (three fields, ∼10–20 square degrees each) and wide (∼10 000 square degrees) fields. While the survey is not designed to discover transients, the deep fields will have repeated observations over a two-week span, followed by a gap of roughly six months. In this analysis, we explore how useful the deep field observations will be for measuring properties of Type Ia supernovae (SNe Ia). Using simulations that includeEuclid’s planned depth, area, and cadence in the deep fields, we calculate that more than 3700 SNe between 0.0 << 1.5 will have at least fiveEucliddetections around peak with signal-to-noise ratio larger than 3. While on their own,Euclidlight curves are not good enough to directly constrain distances, when combined with legacy survey of space and time (LSST) deep field observations, we find that uncertainties on SN distances are reduced by 20–30 per cent for< 0.8 and by 40–50 per cent for> 0.8. Furthermore, we predict how well additionalEuclidmock data can be used to constrain a key systematic in SN Ia studies – the size of the luminosity ‘step’ found between SNe hosted in high-mass (>1010M⊙) and low-mass (<1010M⊙) galaxies. This measurement has unique information in the rest-frame near-infrared (NIR). We predict that if the step is caused by dust, we will be able to measure its reduction in the NIR compared to optical at the 4σ level. We highlight that the LSST andEuclidobserving strategies used in this work are still provisional and some level of joint processing is required. Still, these first results are promising, and assuming thatEuclidbegins observations well before theNancy Roman Space Telescope(Roman), we expect this data set to be extremely helpful for preparation forRomanitself.