An international team of scientists, using the ground-based Gemini Observatory telescope in Chile, is the first to directly measure the amount of both water and carbon monoxide in the atmosphere of a planet in another solar system roughly 340 light-years away.
The team is led by Assistant Professor Michael Line of Arizona State University’s School of Earth and Space Exploration, and the results were published today (October 27, 2021) in the journal Nature.
There are thousands of known planets outside of our own solar system (called exoplanets). Scientists use both space telescopes and ground-based telescopes to examine how these exoplanets form and how they are different from the planets in our own solar system.
“These amounts were in line with our expectations and are about the same as the host star’s,” Line said.
Obtaining ultra-precise gas abundances in exoplanet atmospheres is not only an important technical achievement, especially with a ground-based telescope, it may also help scientists look for life on other planets.
“This work represents a pathfinder demonstration for how we will ultimately measure biosignature gases like oxygen and methane in potentially habitable worlds in the not-too-distant future,” Line said.
What Line and the team expect to do next is repeat this analysis for many more planets and build up a “sample” of atmospheric measurements on at least 15 more planets.
“We are now at the point where we can obtain comparable gas abundance precisions to those planets in our own solar system. Measuring the abundances of carbon and oxygen (and other elements) in the atmospheres of a larger sample of exoplanets provides much needed context for understanding the origins and evolution of our own gas giants like Jupiter and DOI: 10.1038/s41586-021-03912-6
In addition to Line, the research team includes Joseph Zalesky, Evgenya Shkolnik, Jennifer Patience, and Peter Smith of ASU’s School of Earth and Space Exploration; Matteo Brogi and Siddharth Gandhi of the
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