WFIRST用Redder滤波器的科学优势
The Science Advantage of a Redder Filter for WFIRST
摘要：
WFIRST将能够在数千平方度的天空中提供哈勃质量的成像性能。WFIRST的广域、高空间分辨率调查数据在未来几十年内都将是无与伦比的。在目前的基线设计中，WFIRST滤光片将从光学设计允许的最蓝波长延伸到红色截止波长为2.0微米的最红滤光片（F184W）。在本白皮书中，我们概述了添加中心波长为2.15微米的Ks滤波器的一些科学优势，以便在考虑到天文台的热性能和探测器的灵敏度的情况下，尽可能将WFIRST的波长覆盖范围扩展到红色。
英文摘要：
WFIRST will be capable of providing Hubble-quality imaging performance over several thousand square degrees of the sky. The wide-area, high spatial resolution survey data from WFIRST will be unsurpassed for many decades into the future. With the current baseline design, the WFIRST filter complement will extend from the bluest wavelength allowed by the optical design to a reddest filter (F184W) that has a red cutoff at 2.0 microns. In this white paper, we outline some of the science advantages for adding a Ks filter with a 2.15 micron central wavelength in order to extend the wavelength coverage for WFIRST as far to the red as the possible given the thermal performance of the observatory and the sensitivity of the detectors.
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