Monday , June 27 2022

179 light-years away from the world are detecting water on an outer planet. Technology and Science | science


Using the most advanced technology, there is a team of astronomers at Keck Observatory. water detected in exoplanet atmosphere 179 light years away from ours. About HR 8799 cStar HR 8799 is in the solar system turning around.

In 2008, scientists explained using the Keck and Gemini telescopes that they directly observed three limbs around the aforementioned star: HR 8799b, c and d. Then, in 2010 they announced the discovery of a fourth planet, HR 8799 e.

Now, the presented work is based on the data obtained in 2008. New observations made with direct images are HR 8779, a young giant gas planet that is about seven times the mass of Jupiter, which is over 200 of our solar system. star orbit years.

According to the authors, the data obtained from this opportunity, the presence of water in the atmosphere and absence of methane in.

— Technology —

Researchers to achieve this result The combination of two Keck telescope technology. First, adaptive optics that eliminate the common effects of Earth's atmosphere. The second is a spectrometer on the Keck 2 telescope called the Echelle Near Infrared Cryogenic Spectrograph (NIRSPEC), a high resolution spectrometer that works with infrared light.

According to Dimitri Mawet, professor and research co-author at Caltech, he explained:

"This kind of technology is what we want to use in the future to look for signs of life on a planet similar to the Earth. We're not there yet, but we're moving forward."

— Research —

New findings published in the journal Journal of Astronomy. He is a former postdoctoral fellow at Caltech, and is now an assistant professor at Ohio State University, Ji Wang.

So far, astronomers have taken more pictures than a dozen outer planets. The HR 8799 system is the first multi-planetary system in which images are acquired directly. However, this is only the first step of this study.

Upon receipt, images can be analyzed for the chemical composition in their atmosphere. This is where spectroscopy comes from. In this case, the improved skills of NIRSPEC were important.

NIRSPEC is an infrared band. It is an infrared light type having a region of the spectrum with a wavelength of about 3.5 micrometers and large detailed chemical footprints.

"The L group had been overlooked because the sky was brighter at this wavelength, if you were an alien with eyes in harmony with the L band, you would see an extremely bright sky, so it's hard to see the outer planets," Mawet explains.

By combining the band with adaptive optics, they were able to make the most accurate measurements of the planet, thus confirming the presence of water and the absence of methane.

With information from the Universe Today and Busness Insider

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