可居住区的宽带稳定星球探测器Fabry-PérotEtalon校准系统:染色变化的证据
Ryan C Terrien1, Joe P Ninan2,3, Scott A Diddams4,5
1Carleton College, One North College Street, Northfield, MN 55057, USA.
概括
一个Fabry-Pérot标准为精确的多普勒测量提供了稳定的参考光谱. 宽带稳定性监测显示了色谱漂移,影响了对外行星探测的长期校准准确性.
科学领域:
- 天文学和天体物理学
- 光学物理学的光学物理学
- 探测系外行星的探测器
背景情况:
- 法布里 - 佩罗特标准为精确的多普勒测量提供了具有成本效益的,稳定的光谱参考.
- 了解宽带稳定性对于它们作为多普勒校准器的应用至关重要.
- 之前的研究缺乏全面的宽带或长期稳定性数据.
研究的目的:
- 进行一个Fabry-Pérot标准系统的长期宽带稳定性监测活动.
- 为了评估标准的适用性作为一个精确的波长校准器可居住区行星探测器 (HPF) 光谱仪.
- 为了研究随着时间的推移,标准模式稳定性的色彩变化.
主要方法:
- 监测了Fabry-Pérot标准的约3500个共振模式 (30GHz FSR,820-1280nm带宽) 在约6个月内.
- 使用电光频率子进行高精度波长引用.
- 分析HPF光谱仪数据以追踪模式波长演变.
主要成果:
- 在Fabry-Pérot模式位置和它们的时间演变中观察到的色谱结构.
- 测量平均漂移~2厘米s-1日-1日,局部变化高达±5厘米s-1日-1.
- 证明了对HPF的波长校准支持,波长为每天10厘米-1和每天30厘米-1 (约10天).
结论:
- 法布里 - 佩罗标准稳定性表现出色素依赖,受镜 dispersion 的影响.
- 该系统支持HPF波长校准在指定精度范围内.
- 长期的,光谱分辨率的研究对于达到~10cm s-1的多普勒精度至关重要.
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