In Orbit

Frank Morring Jr.

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In Orbit

机译：在轨

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Near-infrared speetroscopy of a Jupiter-size planet orbiting a star 63 light-years from Earth has found carbon dioxide in its atmosphere, demonstrating a technique that may be used with the James Webb Space Telescope and other large observatories operating at near-IR wavelengths to spot the signatures of life on other extrasolar planets. While the planet HD 189733b is too hot for life, detection of CO_2 there "is significant for the long-term effort char-acterizing planets," says Mark Swain of the Jet Propulsion Laboratory. Swain led a team that used the Near-Infrared Camera and Multi-Object Spectrometer on the Hubble Space Telescope to study HD 189733b, which orbits its star every 2.2 days. By comparing the light emitted by the star when the planet is in eclipse behind it with combined light when the planet is facing Earth, Swain's team found both CO_2 and carbon monoxide. Such biomarkers are best seen in near-IR wavelengths, raising hopes the Webb instrument will be able to detect them on Earth-size planets.

机译：在距离地球63光年远的一颗恒星上运行的木星大小行星的近红外光谱学发现其大气中存在二氧化碳，这证明了可与James Webb太空望远镜以及其他在近红外波长工作的大型天文台一起使用的技术发现其他太阳系外行星的生命特征。喷气推进实验室的马克·斯温说，虽然HD 189733b行星的使用寿命太热，但对CO_2的检测“对于长期努力鉴定行星具有重要意义。”斯温（Swain）领导的团队使用哈勃太空望远镜上的近红外相机和多目标光谱仪研究了HD 189733b，该恒星每2.2天绕恒星运行一次。 Swain的团队通过比较当行星处于月食之后恒星发出的光与面对地球时的组合光，发现了CO_2和一氧化碳。最好在近红外波长看到此类生物标记，这使韦伯仪器有望在地球大小的行星上检测到它们。

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《Aviation Week & Space Technology》 |2008年第23期|p.14|共1页
作者
Frank Morring Jr.;
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收录信息美国《工程索引》(EI);
原文格式 PDF
正文语种 eng
中图分类航空;
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In Orbit

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