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NARIT scientists collaborated to discover “water” on planets outside the solar system.



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The planet KELT-11b, which looks like Saturn.

NARIT National Astronomical Research Institute In a Facebook post, researchers #NARIT collaborated to discover “water” in the atmosphere of the planets outside the solar system.

A team of researchers from NARIT together with an international team of astronomers. Water was discovered on the exoplanet KELT-11b through observations and data collection by the Hubble Space Telescope. Spitzer Space Telescope Tess Space Telescope And other telescopes around the world, including a 0.5 meter telescope at the National Observatory. About Doi Inthanon, Chiang Mai Province, the research was published in The Astronomical Journal, No. 160, No. 6, on November 23, 2020.

The study of the atmosphere on exoplanets is done by observing the phenomenon. # The transit of planets or transit when an exoplanet passes in front of a star. The star’s light is blocked by the planet’s surface. Getting astronomers to notice a decrease in the star’s brightness But for planets with an atmosphere Below the page Some of the star’s light is absorbed by elements and molecules in the planet’s atmosphere. Do while observing the planet’s passages in different wavelengths Astronomers will see uneven dips in light for each wavelength. It depends on the chemical composition of the planet’s atmosphere.

Prof. Supachai Aviphan, researcher at Dr. One of the co-authors said that the work studied the atmosphere on the exoplanet KELT-11b, a Saturn-like planet with a mass of only 0.171 times Jupiter. Its radius is 1.35 times larger than Jupiter’s radius and orbits the star KELT-11 with a orbital period of only 4.74 days from its small but large mass, making KELT-11b one of the densest planets ever discovered. Found Due to its low density, astronomers have predicted that the planet KELT-11b will have a thicker atmosphere. Suitable for studying the atmosphere on the planets

A team of astronomers, led by Knicole Colon from NASA’s Goddard Space Flight Center, along with an international team of astronomers and scientists Dr, observed the KELT-11b teleportation with the Hubble Space Telescope. Spitzer Space Telescope And the Tess Space Telescope And to study the variation of stars during telescope observations around the world. Including a 0.5 meter telescope at the Royal Observatory to honor the 7th anniversary or National Observatory Located at Doi Inthanon, Chom Thong District, Chiang Mai Province in April 2018, the study found that the planet KELT-11b has water as an element in the atmosphere . With molecules of HCN, TiO and AlO

Dr. Supachai added that Currently, the study of the atmosphere of planets outside the solar system is one of the most important studies. Previously, there are many exoplanet atmospheres in the research area, such as the study of the atmosphere in the exoplanet GJ3470b, which has a blue sky like the earth. Development of an appropriate exoplanet evaluation equation for atmospheric studies And the use of machine learning techniques to develop atmospheric simulation of exoplanets

In addition, Dr. Sor has continued to develop a network of telescopes for astronomy research since 2019, a 0.5 meter telescope at the Royal Observatory of 7th Anniversary used in this research. It has been replaced by a 1.0 m telescope, which increases the potential for astronomers to observe. To continue research internationally in the future

Compiled by: Dr. Supachai Aviphan, scientist on exoplanets in the solar system



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