2023-06-25 01:56:04
A research team led by Sebastian Zieba, a graduate student at the Max Planck Institute for Astronomy (MPIA), has discovered an exoplanet, TRAPPIST-1 c, regarding 40 light years away in the constellation Aquarius. ) has revealed that it does not have a thick atmosphere like that of Venus. According to the research team, when thermal radiation (wavelength 15 μm) from the dayside surface of TRAPPIST-1 c was observed with the James Webb Space Telescope’s Mid-Infrared Observatory (MIRI), the dayside temperature was approximately It turned out to be 110°C (approximately 380 Kelvin). This is up to 390°C lower than that of Venus, meaning that there is no thick atmosphere that produces a strong greenhouse effect, mainly composed of carbon dioxide. 【▲ An artist’s impression of the exoplanet TRAPPIST-1 c (left) reflecting the results of this research (Credit: Illustration: NASA, ESA, CSA, Joseph Olmsted (STScI); Science: Sebastian Zieba (MPI-A) , Laura Kreidberg (MPI-A))]TRAPPIST-1 c is one of the seven exoplanets found in the red dwarf “TRAPPIST-1″, and orbits outside the habitable zone of TRAPPIST-1. doing. With a diameter of 1.10 times and a mass of 1.31 times that of Earth, it is believed to be a rocky planet similar in size to Earth and Venus. The distance to its main star, TRAPPIST-1, is only regarding 1.6% of the distance from the Earth to the Sun. It is believed that In this case, one side of TRAPPIST-1 c is always daytime and the other side is always nighttime. Red dwarfs are smaller than the Sun and have a lower surface temperature, but it has been pointed out that they may strip away the planet’s atmosphere because they emit strong stellar winds and ultraviolet rays. Zieba commented on the motivation for the research, “I wanted to know whether TRAPPIST-1 c might escape the fate of atmospheric dissipation and retain a solid atmosphere, and whether it might resemble Venus.” doing. Regarding TRAPPIST-1 b, which revolves further inside TRAPPIST-1 c, research results have already been announced that it has become clear from observations with the Webb Space Telescope that it is a Mercury-like planet without an atmosphere. It has been. RELATED: Webb Space Telescope measures temperature of exoplanet TRAPPIST-1b No atmosphere possible It is said that the possibility of existence in 1 c still remains. Whether or not TRAPPIST-1 c has an atmosphere will be revealed by additional observations by the Webb Space Telescope or by observations by the European Southern Observatory (ESO)’s Very Large Telescope (ELT), which is scheduled to start observations by around 2030. It is expected that A paper summarizing the results of the research team was published in Nature on June 19, 2023. SourceImage Credit: Illustration: NASA, ESA, CSA, Joseph Olmsted (STScI); Science: Sebastian Zieba (MPI-A), Laura Kreidberg (MPI-A)MPIA – Searching for an atmosphere on the rocky exoplanet TRAPPIST-1 cSTScI – Webb Rules Out Thick Carbon Dioxide Atmosphere for Rocky ExoplanetZieba et al. – No thick carbon dioxide atmosphere on the rocky exoplanet TRAPPIST-1 c (Nature) by sorae Editorial Department
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