Wednesday , March 3 2021

Water detects 179-light-years-old exoplanet at Earth's south Technology and science | science

Using the most advanced technology, a group of astronomers at the Keck Observatory The water of an exoplanet has been detected in water 179 light years away from us. About this HR 8799 cWith a solar radiating system with HR 8799.

In 2008, scientists announced, using Keck and Gemini telescopes, they saw three exoplanets around the stars mentioned above: HR 8799b, c and d. Then, in 2010, they discovered the fourth planet, HR 8799 e.

Now, the analysis presented is based on data obtained in 2008. Direct observations with images are HR 8779 c, Jupiter's mass fiber gas gas approximately seven times, our colossus of the solar system, 200 Years in its star orbit.

The data obtained in this option, according to the authors, would confirm the presence of water in the atmosphere as well inorganic methane in it

— Technology —

For this purpose, the researchers use it Combinations of two Keck telescopes. The first is an adaptive optic, faced with the diffuse effects of the Earth's atmosphere. The second is the Keck 2 telescope spectrometer, the Near Infrared Cryogenic Spectrograph Echelle (NIRSPEC), a high resolution, high resolution infrared light spectrometer.

According to Dimitri Mawet, author of the Caltech teacher and research, he explained:

"What kind of technology we want to use in the future is to look for life-like signs on the Earth's planet. We're not yet, but we are moving forward."

— Research —

The new findings were published in the journal Astronomy Magazine. Ji Wang, former PhD graduate from Caltech, is an Assistant Professor at Ohio State University.

So far, astronomers have photographed more than a dozen exoplanets directly. The HR 8799 system is the first multi-system system to obtain live images. But this investigation is just the first step.

When they are released, images can be analyzed in the chemical composition of chemical environments. Here is the spectroscopy. In this case, NIRSPEC's refined skills were key.

NIRSPEC is a tool that works on infrared L band. Infrared light, a wavelength and spectrum area of ​​about 3.5 microns with high specific chemical traces.

"The L team has forgotten the sky because the sky is brighter because of this wave horizon, if you were alien to a band L, you would see a bright sky, it's hard to see exoplanets through Belo," explains Mawet.

Combining Adaptive Optic Bands were able to perform accurate measurements of the planet, thus revealing lack of water and methane.

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