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Hunting Planets and Observing Disks with the JWST NIRCam Coronagraph

机译:使用JWST NIRCam日冕仪搜寻行星和观测盘

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摘要

The expected stable point spread function, wide field of view, and sensitivity of the NIRCam instrument on the James Webb Space Telescope (JWST) will allow a simple, classical Lyot coronagraph to detect warm Jovian-mass companions orbiting young stars within 150 pc as well as cool Jupiters around the nearest low-mass stars. The coronagraph can also be used to study protostellar and debris disks. At λ = 4.5 urn, where young planets are particularly bright relative to their stars, and at separations beyond ~0.5 arcseconds, the low space background gives JWST significant advantages over ground-based telescopes equipped with adaptive optics. We discuss the scientific capabilities of the NIRCam coronagraph, describe the technical features of the instrument, and present end-to-end simulations of coronagraphic observations of planets and circumstellar disks.
机译:詹姆斯·韦伯太空望远镜(JWST)上预期的稳定点扩展功能,宽视野和NIRCam仪器的灵敏度,将使简单的经典Lyot日冕仪也能探测到150星以内的年轻恒星的温暖木星质量伴星像最近的低质量恒星周围的酷木星。日冕仪也可用于研究原恒星和碎片盘。在λ= 4.5 urn时,年轻的行星相对于恒星特别明亮,并且相隔超过约0.5弧秒时,低空间背景为JWST提供了优于配备自适应光学元件的地基望远镜的显着优势。我们讨论了NIRCam日冕仪的科学能力,描述了仪器的技术特征,并提出了对行星和恒星盘日冕观测的端对端模拟。

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