Wide-field adaptive optics performance in cosmological deep fields for multi-object spectroscopy with the European Extremely Large Telescope

Wide-field adaptive optics performance in cosmological deep fields for multi-object spectroscopy with the European Extremely Large Telescope
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欧洲极大望远镜在宇宙深场多目标光谱中的宽视场自适应光学性能

DOI:
10.1093/mnras/stu2022
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发表时间:
2014
影响因子:
4.8
通讯作者:
Basden A
Basden A
中科院分区:
物理与天体物理2区
文献类型:
--
作者:
Basden A

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为了在良好的天空覆盖范围内运行,将需要在即将到来的欧洲极大望远镜上安装一台多物体摄谱仪。许多有趣的深宇宙学领域被故意选择为没有明亮的前景恒星,因此对自适应光学(AO)系统具有潜在的挑战性。在这里,我们调查多对象AO性能随机选择的子字段内的大天文台起源深调查(GOODS)-S字段,这是最坏的情况下广泛用于高红移星系的研究五个深场。我们的AO系统模型是基于建议的MOSAIC仪器,但我们的研究结果同样适用于任何计划中的超大望远镜的多目标光谱计划。潜在的引导星在这些子领域内的识别和用于模拟AO校正。我们在75质量标准内实现了25- 35%的能量,这取决于子场,这足以探测高红移星系中的次千秒差距尺度。我们还研究了探测器读出噪声对AO系统性能的影响,并考虑了自然导星用于高阶和倾斜仅AO校正的情况。我们还考虑了性能如何与能量盒大小成比例。总之,预期的AO性能对于MOSAIC类仪器来说是足够的,即使在以缺乏明亮前景恒星为特征的深视场中也是如此。
A multi-object spectrograph on the forthcoming European Extremely Large Telescope will be required to operate with good sky coverage. Many of the interesting deep cosmological fields were deliberately chosen to be free of bright foreground stars, and therefore are potentially challenging for adaptive optics (AO) systems. Here, we investigate multi-object AO performance using subfields chosen at random from within the Great Observatories Origins Deep Survey (GOODS)-S field, which is the worst case scenario for five deep fields used extensively in studies of high-redshift galaxies. Our AO system model is based on that of the proposed MOSAIC instrument but our findings are equally applicable to plans for multi-object spectroscopy on any of the planned Extremely Large Telescopes. Potential guide stars within these subfields are identified and used for simulations of AO correction. We achieve ensquared energies within 75 mas of between 25–35 per cent depending on the subfield, which is sufficient to probe sub-kpc scales in high-redshift galaxies. We also investigate the effect of detector readout noise on AO system performance, and consider cases where natural guide stars are used for both high-order and tip-tilt-only AO correction. We also consider how performance scales with ensquared energy box size. In summary, the expected AO performance is sufficient for a MOSAIC-like instrument, even within deep fields characterized by a lack of bright foreground stars.
E-ELT 的 MOSAIC:用于天体物理学、IGM 和宇宙学的多目标光谱仪
DOI: 10.1117/12.2055148
发表时间: 2014
期刊: Deutsche Zeitschrift fur Nervenheilkunde
影响因子: --
作者:
F. Hammer;B. Barbuy;J. Cuby;L. Kaper;S. Morris;C. Evans;P. Jagourel;G. Dalton;P. Rees;M. Puech;M. Rodrigues;D. Pearson;K. Disseau
通讯作者: K. Disseau
天文自适应光学的实时相关参考更新
DOI: 10.1093/mnras/stu027
发表时间: 2014
影响因子: 4.8
作者:
Basden A
通讯作者: Basden A
DOI: 10.1111/j.1365-2966.2008.13808.x
发表时间: 2008
影响因子: 4.8
作者:
M. Puech;H. Flores;M. Lehnert;B. Neichel;T. Fusco;P. Rosati;J. Cuby;G. Rousset
通讯作者: G. Rousset
C.A.诺曼:《天体物理学杂志》。
DOI: --
发表时间: --
期刊:
影响因子: --
作者:
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蒙特卡罗自适应光学仿真中 EAGLE 的注意事项
DOI: 10.1364/ao.49.0000g1
发表时间: 2010
期刊: Applied Optics
影响因子: 1.9
作者:
Basden A
通讯作者: Basden A