UCL official website published information on the 16th that the school’s astronomers conducted direct detection of a “super-Earth†atmosphere for the first time, discovered evidence of the presence of hydrogen and helium, but found no water. The trail.
This "Super Earth" named "55 Cancri e" belongs to a rocky planet, which is about twice as large as the Earth and eight times as massive as Earth. It is very close to the central star, and it takes only 18 hours to turn around. The surface temperature exceeds 2000 degrees Celsius. Its parent star, 55 Cancri, named “Copernicusâ€, is 40 light-years away from Earth. It is part of Cancer. Because it is very bright, scientists can use it to provide the spectral information to uncover the atmosphere in the “Super Earth†atmosphere. The "veil."
The researchers published a paper in the latest issue of the journal Astrophysics that they used the third-generation wide-area camera (WFC3) on the Hubble Space Telescope to scan the entire “Copernicus†star to create many spectra. . In the latest study, the scientists compared the differences between these fast scans and processed the information using a computer “Pipeline†analysis software to obtain the spectral imprint of “55 Cancri†planets embedded in stellar light. Previously, WFC3 had been ordered to probe the other two "Super Earth" atmospheres, but no spectral features were found.
Giovanna Tinetti, a research collaborator and professor of the UCL physics and astronomy department, said that the latest study is the first to understand the “Super Earth†atmosphere of the “55 Cancri e†and to understand its formation and evolution as well as its current appearance. It is of great significance to learn more about it and other "super-Earth."
In addition, researchers also found evidence of the existence of hydrocyanic acid in the data of this study. This chemical is often used as a carbon-rich marker in the atmosphere. This conclusion again confirms that “55 Cancri e "It is also a diamond planet with a high carbon content. However, hydrocyanic acid is very toxic and may not be suitable for human habitation here. Jonathan Tennyson, another co-author of the study, said whether the planet is truly carbon-rich and that it will take several years for the next-generation infrared telescope to further explore its atmospheric hydrogen cyanide and other molecules. (Reporter Liu Xia)
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