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主題: MWC 758c_ A Planet has Whipped Up Spiral Arms Around a Young Star 作者: peter 於 2023-07-10 12:47:18 原恆星盤 MWC 758 巨大的系外行星MWC 758c
http://www.uux.cn/viewnews-116386.html https://www.nature.com/articles/s41550-023-02028-3 MWC 758c_ A Planet has Whipped Up Spiral Arms Around a Young Star https://www.universetoday.com/162323/a-planet-has-whipped-up-spiral-arms-around-a-young-star/#more-162323 Astronomers have found a Jovian protoplanet orbiting a young star known as MWC 758, which is about 500 light-years from Earth. The planet, called MWC 758c, is about twice the mass of Jupiter and orbits its young star at a distance of about 100 AU, or more than three times the distance of Neptune from the Sun. The spiral disk system has been known for a while, but previous observations showed no evidence of a planet. That’s because MWC 758c is particularly red, meaning either it is very cool or shrouded by lots of dust. Low red wavelengths are difficult for ground-based telescopes to observe due to the thermal noise of Earth’s atmosphere. It took the Large Binocular Telescope Interferometer (LBTI), which specializes in infrared and near-infrared observations, to finally observe the gas giant. |