Astronomers2 using the Atacama Large Millimeter/submillimeter Array have observed what may be the first-ever signs of windy weather around a T Tauri star, an infant analog3 of our own Sun. This may help explain why some T Tauri stars have disks that glow weirdly4 in infrared5 light while others shine in a more expected fashion. T Tauri stars are the infant versions of stars like our Sun. They are relatively6 normal, medium-size stars that are surrounded by the raw materials to build both rocky and ga网站优化us7 planets. Though nearly invisible in optical light, these disks shine in both infrared and millimeter-wavelength light.The material in the disk of a T Tauri star usually, but not always, emits infrared radiation with a predictable energy distribution, said Colette Salyk, an astronomer1 with the National Optical Astronomical8 Observatory9 in Tucson, Ariz., and lead author on a paper published in the Astrophysical Journal. Some T Tauri stars, however, like to act up by emitting infrared radiation in unexpected ways.To account for the different infrared signature around such similar stars, astronomers propose that winds may be emanating10 from within some T Tauri stars proTOPlanetary disks. These winds could have important implications for planet formation, potentially robbing the disk of some of the gas required for the formation of giant Jupiter-like planets, or stirring up the disk and causing the building blocks of planets to change location entirely11. These winds have been predicted by astronomers, but have never been clearly detected.Using ALMA, Salyk and her colleagues looked for evidence of a possible wind in AS 205 N -- a T Tauri star located 407 light-years away at the edge of a star-forming region in the constellation12 Ophiuchus, the Snake Bearer. This star seems to exhibit the strange infrared signature that has intrigued13 astronomers.
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1 astronomer n.天文学家 参考例句： A new star attracted the notice of the astronomer.新发现的一颗星引起了那位天文学家的注意。 He is reputed to have been a good astronomer.他以一个出色的天文学者闻名于世。
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