NARIT scientists have joined forces to discover ‘water’ on planets outside the solar system.


Planet KELT-11b that looks like Saturn.

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

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

The study of the atmosphere of exoplanets is done by observing this phenomenon. # Planet transits, or transits as an exoplanet passes in front of a star. The star’s light is blocked by the planet’s surface. Making astronomers notice a star’s decrease in brightness But for planets with atmosphere As the side passes, some of the star’s light is absorbed by elements and particles in the planet’s atmosphere. Done when observing the transits of planets at different wavelengths Astronomers will notice uneven declines of light for each wavelength. It depends on the chemical composition of the planet’s atmosphere.

Prof. Supachai Aviphan, researcher at Exoplanet and Biophysics Research Group One of the co-authors said the work investigated the atmosphere of exoplanet KELT-11b, a Saturn-like planet with a mass of just 0.171 Jupiter. It is 1.35 times the radius of Jupiter, orbiting the star KELT-11 with an orbit period of only 4.74 days from its small but high mass, making KELT-11b one of the densest planets ever discovered. Found Due to its low density, astronomers predicted the planet KELT-11b would have a thicker atmosphere. It is suitable for studying the atmosphere of planets

A team of astronomers, led by NASA’s Goddard Space Flight Center’s Knicole Colon, along with an international team of astronomers and researchers Dr., observed the teleportation of KELT-11b with the Hubble Space Telescope. The Spitzer Space Telescope I the Tess Space Telescope And the study of stellar variability when observing with telescopes around the world. Including 0.5-meter telescope at the Royal Observatory for the 7th Anniversary or National Observatory A study conducted at Doi Inthanon in Chom Thong District, Chiang Mai Province in April 2018 found that KELT-11b has water as part of the atmosphere. With HCN, TiO and AlO particles

Dr. Supachai added that One of the main studies is currently studying the atmosphere of planets outside the solar system. In the past, many exoplanet studies and biomedical studies have been carried out in the atmosphere of exoplanets, such as the study of the atmosphere of the exoplanet GJ3470b, which has a blue sky like Earth. Development of an appropriate exoplanet assessment equation to study the atmosphere and the use of machine learning techniques to simulate the atmosphere of exoplanets

In addition, Dr. Sor has been continuing the development of a telescope network for astronomical research since 2019, the 0.5-meter telescope at the Royal 7th Anniversary Observatory used in this research. It was replaced with a 1.0 m telescope, which will increase the observation capabilities of astronomers. To continue international research in the future

Compiled by Dr. Supachai Aviphan, researcher of exoplanets in the solar system


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