arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1901.07567astro-ph.IMastro-ph.EPastro-ph.SR
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对单模光纤光谱仪的需求

The need for single-mode fiber-fed spectrographs

Jonathan Crass, Andrew Bechter, Eric Bechter, Charles Beichman, Cullen Blake, David Coutts, Tobias Feger, Sam Halverson, Robert J. Harris, Nemanja Jovanovic, Pe… 展开作者

Jonathan Crass, Andrew Bechter, Eric Bechter, Charles Beichman, Cullen Blake, David Coutts, Tobias Feger, Sam Halverson, Robert J. Harris, Nemanja Jovanovic, Peter Plavchan, Christian Schwab, Gautam Vasisht, James K. Wallace, Ji Wang

摘要:

精确的多普勒径向速度(RV)仪器将继续在推进我们对系外行星系统的全面理解方面发挥重要作用。从过境调查和后续RV测量的轨道参数的组合是至关重要的解锁质量和密度估计检测到的行星,让我们深入了解他们的环境和结构。然而,系外行星领域正处于一个关键时刻:现有径向速度仪器的测量灵敏度正在成为进一步增加我们知识的限制因素。如果不提高RV测量精度,我们将无法为新的凌日任务(包括凌日系外行星勘测卫星(TESS))预期的一些最令人兴奋(因此也是最具挑战性)的发现提供动态质量和密度估计(Plavchan et al. 2015,Ricker et al. 2014)。RV的精度需要达到10厘米/秒的水平,以充分确认类似地球的类似物,提供质量并测量这些任务的密度到1-5%的水平。此外,这种RV能力对于詹姆斯韦伯太空望远镜(JWST)等设施的有效目标选择也很重要。实现这一目标的一个有希望的方法是使用单模光纤将光注入光谱仪。这减轻了当前一代视见受限RV仪器面临的许多误差项,同时在较小的光学足迹内提供了高分辨率光谱的能力(Schwab等人,2012年; Crepp 2014年; Jovanovic等人,2016年a)。我们讨论了这种技术的好处,它的挑战,以及目前的发展状况。

英文摘要:

Precise Doppler radial-velocity (RV) instruments will continue to play an essential role in advancing our holistic understanding of exoplanetary systems. The combination of orbital parameters from transit surveys and follow-up RV measurements is vital to unlock mass and density estimates of detected planets, giving us insight into their environment and structure. However, the exoplanet field is reaching a critical juncture: the measurement sensitivity of existing radial-velocity instruments is becoming the limiting factor in further increasing our knowledge. Without improvement in delivered RV measurement precision, we will not be able to provide dynamical mass and density estimates for some of the most exciting (and consequently most challenging) discoveries expected from new transit missions including the Transiting Exoplanet Survey Satellite (TESS) (Plavchan et al. 2015, Ricker et al. 2014). RV precisions at the 10cm/s level are required to fully confirm earth-like analogues, provide masses and measure density to the 1-5% level from these missions. Additionally, this RV capability will also be important to allow for efficient target selection for facilities such as the James Webb Space Telescope (JWST). A promising way forward to achieve this goal is to use single-mode fibers to inject light to a spectrograph. This mitigates many of the error terms facing current generation seeing-limited RV instruments while simultaneously offering the capability of high resolution spectroscopy within a small optical footprint (Schwab et al. 2012, Crepp 2014, Jovanovic et al. 2016a). We discuss the benefits of this technique, its challenges, and the current status of development.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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